BEGIN:VCALENDAR PRODID:-//Inverse inc./SOGo 5.12.9//EN VERSION:2.0 METHOD:PUBLISH BEGIN:VTIMEZONE TZID:Europe/Berlin LAST-MODIFIED:20220503T203402Z X-LIC-LOCATION:Europe/Berlin BEGIN:DAYLIGHT TZNAME:CEST TZOFFSETFROM:+0100 TZOFFSETTO:+0200 DTSTART:19700329T020000 RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=-1SU END:DAYLIGHT BEGIN:STANDARD TZNAME:CET TZOFFSETFROM:+0200 TZOFFSETTO:+0100 DTSTART:19701025T030000 RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU END:STANDARD END:VTIMEZONE BEGIN:VEVENT UID:107077-65391080-3-B61FFA0 SUMMARY:TBA LOCATION:IRIS 1.221 CLASS:PUBLIC CATEGORIES:Seminar X-SOGO-SEND-APPOINTMENT-NOTIFICATIONS:NO TRANSP:OPAQUE DTSTART;TZID=Europe/Berlin:20240621T140000 DTEND;TZID=Europe/Berlin:20240621T153000 CREATED:20221010T115501Z DTSTAMP:20221010T115501Z LAST-MODIFIED:20231025T125700Z SEQUENCE:16 DESCRIPTION:Title: TBA\n\nAbstract: TBA END:VEVENT BEGIN:VEVENT UID:10734F-65391080-1-49F0E70 SUMMARY:Petr Kravchuk (King's College London) LOCATION:IRIS 1.221 CLASS:PUBLIC CATEGORIES:Seminar X-SOGO-SEND-APPOINTMENT-NOTIFICATIONS:NO TRANSP:OPAQUE DTSTART;TZID=Europe/Berlin:20240426T140000 DTEND;TZID=Europe/Berlin:20240426T153000 CREATED:20221010T115501Z DTSTAMP:20221010T115501Z LAST-MODIFIED:20240415T105751Z SEQUENCE:17 DESCRIPTION:Title: Higher-twist Regge trajectories in CFTs\n\nAbstract: On general grounds\, the spectrum of a Conformal Field Theory (CFT) is expect ed to be extremely complicated away from special limits. One such limit co nsists of the lowest energy states for every angular momentum\, known as t he leading-twist states. In this talk I will discuss the structures that e merge in the spectrum as one departs from this limit towards the higher-tw ist states\, focusing especially on the Regge trajectories. In particular\ , I will describe a general mechanism that reconciles the idea of Regge tr ajectories with the growing number of states at large spin. I will then de monstrate how this mechanism works in the case of one-loop phi^4 Wilson-Fi sher theory in epsilon-expansion. This example will also clarify the prope rties of double-twist trajectories and light-cone bootstrap at higher-twis t. Finally\, I will briefly discuss a work in progress on going beyond the double-twist limit. END:VEVENT BEGIN:VEVENT UID:1354-5DB6CE00-63-4E2CA500 SUMMARY:Dr. Rafael Porto (DESY & Hamburg U) DESCRIPTION:Title: Precision Gravity: from the LHC to LISA\n\nAbstract: The nascent field of gravitational wave (GW) science will be an interdiscipli nary subject — enriching different branches of physics — yet the associate d computational challenges are enormous. Faithful theoretical templates ar e a compulsory ingredient for data analysis and reliable physical interpre tation of the signals. \nYet\, while current templates for compact binary sources may be sufficient for detection and crude parameter estimation\, t hey are still too coarse for precision physics with GW data. We then find ourselves in a situation in which\, for key processes within empirical rea ch\, theoretical uncertainties may dominate. To move forward\, and profit the most from GW observations\, more accurate waveforms will be needed. Th is will be critical\, as I will discuss\, to study the equation of state of neutron stars and the nature of black holes\; as well as potentially su ccessful searches for exotic compact objects and putative ultra-light (dar k matter) particles in the Universe. \nThe ‘effective field theory approac h’ to the binary inspiral problem in general relativity — which my collabo rators and I have developed — has been instrumental for the construction o f the state-of-the-art GW template bank. I will review how these and other novel techniques borrowed from particle physics have transformed the stud y of the two-body problem in gravity\, providing key new results and pavin g the road forward to a new era of foundational investigations in physics through GW precision data. CLASS:PUBLIC CREATED:20190509T080107Z DTSTAMP:20190509T080107Z LAST-MODIFIED:20200212T095937Z DTSTART;TZID=Europe/Berlin:20200214T133000 DTEND;TZID=Europe/Berlin:20200214T143000 TRANSP:OPAQUE LOCATION:Konferenzraum 0'119\, Erwin Schrödinger-Zentrum\, Rudower Chaussee 26\, 12489 Berlin CATEGORIES:Seminar SEQUENCE:6 END:VEVENT BEGIN:VEVENT UID:17D53F-66E41400-25-66AB6480 SUMMARY:TBA LOCATION:IRIS 1.221 CLASS:PUBLIC CATEGORIES:Seminar X-SOGO-SEND-APPOINTMENT-NOTIFICATIONS:NO TRANSP:OPAQUE DTSTART;TZID=Europe/Berlin:20240712T140000 DTEND;TZID=Europe/Berlin:20240712T153000 CREATED:20221010T115501Z DTSTAMP:20221010T115501Z LAST-MODIFIED:20231025T125719Z SEQUENCE:16 DESCRIPTION:Title: TBA\n\nAbstract: TBA END:VEVENT BEGIN:VEVENT UID:184519-66E41400-9-17D01660 SUMMARY:TBA LOCATION:IRIS 1.221 CLASS:PUBLIC CATEGORIES:Seminar X-SOGO-SEND-APPOINTMENT-NOTIFICATIONS:NO TRANSP:OPAQUE DTSTART;TZID=Europe/Berlin:20250110T140000 DTEND;TZID=Europe/Berlin:20250110T153000 CREATED:20221010T115501Z DTSTAMP:20221010T115501Z LAST-MODIFIED:20240913T103046Z SEQUENCE:18 DESCRIPTION:Title: TBA\n\nAbstract: TBA END:VEVENT BEGIN:VEVENT UID:184519-66E41400-D-17D01660 SUMMARY:TBA LOCATION:IRIS 1.221 CLASS:PUBLIC CATEGORIES:Seminar X-SOGO-SEND-APPOINTMENT-NOTIFICATIONS:NO TRANSP:OPAQUE DTSTART;TZID=Europe/Berlin:20241115T140000 DTEND;TZID=Europe/Berlin:20241115T153000 CREATED:20221010T115501Z DTSTAMP:20221010T115501Z LAST-MODIFIED:20240913T102951Z SEQUENCE:17 DESCRIPTION:Title: TBA\n\nAbstract: TBA END:VEVENT BEGIN:VEVENT UID:184AE7-66E41400-9-293C4F80 SUMMARY:TBA LOCATION:IRIS 1.221 CLASS:PUBLIC CATEGORIES:Seminar X-SOGO-SEND-APPOINTMENT-NOTIFICATIONS:NO TRANSP:OPAQUE DTSTART;TZID=Europe/Berlin:20241213T140000 DTEND;TZID=Europe/Berlin:20241213T153000 CREATED:20221010T115501Z DTSTAMP:20221010T115501Z LAST-MODIFIED:20240913T103028Z SEQUENCE:18 DESCRIPTION:Title: TBA\n\nAbstract: TBA END:VEVENT BEGIN:VEVENT UID:1D4A-5BE1A500-1-5ED01500 SUMMARY:Prof. Dr. Karen Yeats (Waterloo U) LOCATION:Christian-Gerthsen-Hörsaal\, Lise-Meitner-Haus\, Newtonstraße 15\, 12489 Berlin DESCRIPTION:Title: Some discrete mathematical thoughts on Dyson-Schwinger e quations\n\nAbstract: Dyson-Schwinger equations are the quantum analogues of the equations of motion and so are physically very important and useful .  In their diagrammatic form they also show some nice discrete mathematic al structures.  For example\, diagrammatically they generate certain class es of Feynman diagrams and so act like combinatorial specifications\, and they are compatible with algebraic structures on Feynman diagrams\, like r enormalization Hopf algebras.  In this colloquium I will overview the phys ics and the math of this and close with a different combinatorial expansio n that can go beyond naive Feynman diagrammatics and solve some Dyson-Schw inger equations using an unusual expansion indexed by rooted connected cho rd diagrams. CLASS:PUBLIC CATEGORIES:Seminar CREATED:20181106T142834Z DTSTAMP:20181106T142834Z LAST-MODIFIED:20190201T113721Z DTSTART;TZID=Europe/Berlin:20190205T151500 DTEND;TZID=Europe/Berlin:20190205T161500 TRANSP:OPAQUE X-SOGO-SEND-APPOINTMENT-NOTIFICATIONS:NO END:VEVENT BEGIN:VEVENT UID:23BB07-64491C80-1-5E426380 SUMMARY:Dr. Agnese Bissi (ICTP\, Trieste & Upsala U.) LOCATION:IRIS 1.221 CLASS:PUBLIC CATEGORIES:Seminar X-SOGO-SEND-APPOINTMENT-NOTIFICATIONS:NO TRANSP:OPAQUE DTSTART;TZID=Europe/Berlin:20230519T140000 DTEND;TZID=Europe/Berlin:20230519T153000 CREATED:20221010T115501Z DTSTAMP:20221010T115501Z LAST-MODIFIED:20230505T140447Z SEQUENCE:10 DESCRIPTION:Title: Analytic conformal bootstrap\n\nAbstract: In this talk I will introduce a symmetry based method to study conformal field theories. In particular I will describe a framework to find analytic solutions for observables in conformal field theories. I will end the talk with an appli cation of this analytic method to a class of theories. END:VEVENT BEGIN:VEVENT UID:254172-6347EF00-5-1303D4E0 SUMMARY:Dr. Alexander Blum (MPIWG\, Berlin) LOCATION:IRIS 1.221 CLASS:PUBLIC CATEGORIES:Seminar X-SOGO-SEND-APPOINTMENT-NOTIFICATIONS:NO TRANSP:OPAQUE DTSTART;TZID=Europe/Berlin:20230630T140000 DTEND;TZID=Europe/Berlin:20230630T153000 CREATED:20221010T115501Z DTSTAMP:20221010T115501Z LAST-MODIFIED:20230503T124020Z SEQUENCE:12 DESCRIPTION:Title: On the History of Quantum Field Theory: Origins\, Transf ormations\, Problems\n\nAbstract: This talk will provide an overview of th e history of QFT from its earliest beginnings in the work of Planck and Ei nstein on heat radiation around 1900 to the renormalization of quantum ele ctrodynamics in the late 1940s. A special emphasis will be placed on the r elation between QFT and quantum mechanics\, showing how\, after a long per iod of co-evolution\, QFT to some extent became a framework of its own\, w ith different paradigmatic problems (scattering processes) and different f oundational issues (mathematical consistency). END:VEVENT BEGIN:VEVENT UID:2786-61D6DE80-D-7A7A270 SUMMARY:Prof. Dr. Gabriele Travaglini (Queen Mary\, London) DESCRIPTION:Title: From scattering amplitudes to Newton’s potential and bey ond \n\nScattering amplitudes of elementary particles exhibit a fascinatin g simplicity\, which is entirely obscured in textbook Feynman-diagram comp utations. While these quantities find their primary application to collid er physics\, describing the dynamics of the tiniest particles in the univ erse\, they also characterise the interactions among some of its heaviest objects\, such as black holes. Violent collisions among black holes occur where tremendous amounts of energy are emitted\, in the form of gravitatio nal waves. 100 years after having been predicted by Einstein\, their extra ordinary direct detection in 2015 opened a fascinating window of observati on of our universe at extreme energies never probed before\, and it is no w crucial to develop novel efficient methods for highly needed high-precis ion predictions. Thanks to their inherent simplicity\, amplitudes are idea lly suited to this task. I will begin by reviewing the computation of a v ery familiar quantity Newton's potential\, from scattering amplitudes and unitarity. I will then explain how to compute directly observable quantit ies such as the scattering angle for light or for gravitons passing by a h eavy mass such as a black hole. These computations are further simplified thanks to a remarkable\, yet still mysterious connection between scatterin g amplitudes of gluons (in Yang-Mills theory) and those of gravitons (in E instein's General relativity)\, known as the "double copy"\, whereby the l atter amplitudes can be expressed\, schematically\, as sums of squares of the former -- a property that cannot be possibly guessed by simply staring at the Lagrangians of the two theories. I will conclude by discussing the prospects of performing computations in Einstein gravity to higher orders in Newton's constant using a new\, gauge-invariant version of the double copy\, and as an example I will briefly discuss the computation of the sc attering angle for classical black hole scattering to third post-Minkowski an order (or O(G^3) in Newton's constant G). CLASS:PUBLIC CREATED:20190509T080107Z DTSTAMP:20190509T080107Z LAST-MODIFIED:20220120T153921Z DTSTART;TZID=Europe/Berlin:20220128T140000 DTEND;TZID=Europe/Berlin:20220128T150000 TRANSP:OPAQUE LOCATION:TBA CATEGORIES:Seminar SEQUENCE:13 X-SOGO-SEND-APPOINTMENT-NOTIFICATIONS:NO END:VEVENT BEGIN:VEVENT UID:2A3F-607EE300-1-1BA62B00 SUMMARY:Prof. Dr. Lorenzo Magnea (Torino U.) DESCRIPTION:Title: The infrared structure of perturbative QCD\n\nAbstract: Infrared problems in the evaluation of gauge-theory amplitudes and cross s ections have been a focus of theoretical research for close to a century. Yet\, new discoveries and new ideas continue to emerge\, and high-precisi on phenomenology requires further sharpening of our tools. I will review o ur present understanding of the infrared structure of non-abelian scatteri ng amplitudes\, emphasising the ideas of universality\, factorisation\, ev olution and resummation. I will briefly introduce new ideas for the analys is of soft divergences using conformal field theory tools\, and finally I will discuss the problem of infrared subtraction for high-order prediction s of complex collider observables. CLASS:PUBLIC CREATED:20190509T080107Z DTSTAMP:20190509T080107Z LAST-MODIFIED:20210621T174959Z DTSTART;TZID=Europe/Berlin:20210625T140000 DTEND;TZID=Europe/Berlin:20210625T150000 TRANSP:OPAQUE LOCATION:Zoom Webinar (see qft-colloquium email for meeting ID/link) CATEGORIES:Seminar SEQUENCE:12 END:VEVENT BEGIN:VEVENT UID:2C3F-626BA200-7-79EC4C00 SUMMARY:CANCELLED - Prof. Andreas Weiler (TUM\, Munich) LOCATION:TBA DESCRIPTION:CANCELLED CLASS:PUBLIC CATEGORIES:Seminar CREATED:20220404T104047Z DTSTAMP:20220404T104047Z LAST-MODIFIED:20220628T184405Z DTSTART;TZID=Europe/Berlin:20220701T140000 DTEND;TZID=Europe/Berlin:20220701T150000 TRANSP:OPAQUE SEQUENCE:4 END:VEVENT BEGIN:VEVENT UID:3034-5BE18280-1-5292D480 SUMMARY:Prof. Dr. Lance Dixon (SLAC) LOCATION:Hörsaals 0'110\, Erwin Schrödinger Zentrum\, Rudower Chaussee 26\ , 12489 Berlin DESCRIPTION:Title: Bootstrapping Amplitudes in Planar N=4 Super-Yang-Mills Theory\n\nAbstract: In the planar limit of a large number of colors\, N=4 super Yang-Mills theory is integrable\, and remarkable advances have been made in determining operator anomalous dimensions and more to all loop ord ers. In this talk I'll describe recent progress in constructing scattering amplitudes in this theory to high loop order. Planar N=4 amplitudes are dual to light-like polygonal Wilson-loops\, and are only nontrivial for si x or more gluons. The spaces of functions to which the amplitudes belong are so restrictive that only a few constraints are needed to simply write down the answer\, through seven loops in the six-gluon case and four loops in the seven-gluon case. The results are multi-variate functions of the kinematics\, which can be analyzed in various limits in order to study how high loop order amplitudes factorize. One can also extrapolate from weak to strong coupling\, and compare with the AdS/CFT dual description availab le there. CLASS:PUBLIC CREATED:20181106T120210Z DTSTAMP:20181106T120210Z LAST-MODIFIED:20181214T072824Z DTSTART;TZID=Europe/Berlin:20190108T151500 DTEND;TZID=Europe/Berlin:20190108T161500 TRANSP:OPAQUE X-SOGO-SEND-APPOINTMENT-NOTIFICATIONS:NO CATEGORIES:Seminar SEQUENCE:1 END:VEVENT BEGIN:VEVENT UID:3633-5E970D00-7-73AA3180 SUMMARY:Prof. Dr. Giulia Zanderighi (Max Planck Institut München) DESCRIPTION:Title: Precision at the LHC: why and how\n\nAbstract: With Run II\, the LHC experiment already reached an unprecedented level of precisio n compared to previous hadron colliders. The amount of data collected in R un III and the High-Luminosity run will increase quickly and dramatically. I will discuss specific challenges to theorists that must be overcome to provide predictions that have the precision necessary to match the accurac y of data. A few novel ideas to exploit this precision directly or indirec tly will also be discussed.\n\nFor Zoom Meeting ID or link\, see the annou ncement email from the qft-colloquium mailing list\, or write to Agostino Patella (agostino.patella@physik.hu-berlin.de). CLASS:PUBLIC CREATED:20190509T080107Z DTSTAMP:20190509T080107Z LAST-MODIFIED:20200522T102148Z DTSTART;TZID=Europe/Berlin:20200529T133000 DTEND;TZID=Europe/Berlin:20200529T143000 TRANSP:OPAQUE LOCATION:Zoom Webinar (see qft-colloquium email for meeting ID/link) CATEGORIES:Seminar SEQUENCE:8 END:VEVENT BEGIN:VEVENT UID:3733F7-63612000-F-7BCE7600 SUMMARY:Dr. Matthew McCullough (CERN) LOCATION:IRIS 1.221 CLASS:PUBLIC CATEGORIES:Seminar X-SOGO-SEND-APPOINTMENT-NOTIFICATIONS:NO TRANSP:OPAQUE DTSTART;TZID=Europe/Berlin:20230428T140000 DTEND;TZID=Europe/Berlin:20230428T153000 CREATED:20221010T115501Z DTSTAMP:20221010T115501Z LAST-MODIFIED:20230426T124829Z SEQUENCE:6 DESCRIPTION:Title: The Higgs Boson Under a Microscope\n\nAbstract: What doe s the Higgs boson look like if you put it under a microscope? How does it move? Is it made up of smaller parts? Does it give itself mass? In thi s talk I will sketch a theoretical range of possible answers to these ques tions and\, ultimately\, how we might hope to answer them with the LHC and future colliders. END:VEVENT BEGIN:VEVENT UID:43B2-5F966F80-B-1F973980 SUMMARY:Prof. Dr. Harvey Meyer (Johannes Gutenberg Universität Mainz) DESCRIPTION:Title: The hadronic contributions to the anomalous magnetic mom ent of the muon\n\nAbstract:\nThe anomalous magnetic moment of the muon se rves as a low-energy precision test of the Standard Model of particle phys ics. The White Paper (arXiv:2006.04822) recently published in Physics Repo rts concludes that a tension of 3.7 standard deviations persists between t he direct measurement and the Standard Model prediction of the anomalous m agnetic moment of the muon. A new direct measurement is expected very soon by the E989 experiment at Fermilab. On the theory side\, the uncertainty of the SM prediction is quasi-saturated by the hadronic contributions. I w ill focus on the effort by the lattice QCD community to compute these hadr onic contributions and compare these calculations to phenomenological dete rminations.\n\nFor Zoom Meeting ID or link\, see the announcement email fr om the qft-colloquium mailing list\, or write to Agostino Patella (agostin o.patella@physik.hu-berlin.de). CLASS:PUBLIC CREATED:20190509T080107Z DTSTAMP:20190509T080107Z LAST-MODIFIED:20201118T095849Z DTSTART;TZID=Europe/Berlin:20201127T133000 DTEND;TZID=Europe/Berlin:20201127T143000 TRANSP:OPAQUE LOCATION:Zoom Webinar (see qft-colloquium email for meeting ID/link) CATEGORIES:Seminar SEQUENCE:10 END:VEVENT BEGIN:VEVENT UID:47F8-61D6DF00-D-77930580 SUMMARY:Dr. Maxwell T. Hansen (Edinburgh U.) DESCRIPTION:Title: Multi-particle observables from a finite Euclidean space time\n\nNumerical calculations of lattice regularized QFTs are a powerful tool to understand such theories when analytic methods are not applicable. However\, the utility of numerical results can be affected by two issues: (i) calculations are necessarily performed in a finite-volume spacetime a nd (ii) Euclidean (rather than Minkowski) signature correlation functions are evaluated. Both aspects play an especially important role for multi-pa rticle observables including scattering and decay amplitudes and inclusive rates. In this colloquium\, I will discuss progress for extracting such o bservables from numerical lattice field theory based on two strategies. On e is to use the finite-volume as a tool\, rather than an unwanted artefact \, and to apply generic field theoretic relations between finite-volume qu antities and infinite-volume amplitudes. The second is to carefully regula te the inverse Laplace transform\, in order to estimate Minkowski observab les directly from numerical Euclidean correlators.\n CLASS:PUBLIC CREATED:20190509T080107Z DTSTAMP:20190509T080107Z LAST-MODIFIED:20220216T100415Z DTSTART;TZID=Europe/Berlin:20220218T140000 DTEND;TZID=Europe/Berlin:20220218T150000 TRANSP:OPAQUE LOCATION:Zoom Webinar (see qft-colloquium email for meeting ID/link) CATEGORIES:Seminar SEQUENCE:15 X-SOGO-SEND-APPOINTMENT-NOTIFICATIONS:NO END:VEVENT BEGIN:VEVENT UID:4C5-6385A180-3-6E113C00 SUMMARY:Dr. Martin Lüscher (CERN) LOCATION:Zoom\, broadcasted in IRIS 1\,221 CLASS:PUBLIC CATEGORIES:Seminar X-SOGO-SEND-APPOINTMENT-NOTIFICATIONS:NO TRANSP:OPAQUE DTSTART;TZID=Europe/Berlin:20230120T140000 DTEND;TZID=Europe/Berlin:20230120T153000 CREATED:20221010T115501Z DTSTAMP:20221010T115501Z LAST-MODIFIED:20221129T060828Z SEQUENCE:3 DESCRIPTION:Title: Chiral symmetry\, the topological charge and the Yang-Mi lls gradient flow \n\nAbstract: This talk is about an old issue that arose after the instantons were discovered and numerical lattice gauge theory b ecame a popular subject. The question is whether the division of the field space in topological sectors is a property of QCD at the fully non-pertur bative level or merely an emergent asymptotic feature of the theory in the semi-classical limit. Exactly how the topological susceptibility and the higher moments of the topological charge distribution are defined beyond t he semi-classical level is in fact not obvious\, since the formal expressi ons for the moments are manifestly ultraviolet-divergent.\n\nImportant con ceptual developments in lattice QCD (formulations preserving chiral symmet ry and the proof of the finiteness of the Yang-Mills gradient flow) eventu ally permitted the question to be answered and moreover led to expressions for the moments\, which are finite\, regularization-independent and consi stent with the chiral Ward identities. END:VEVENT BEGIN:VEVENT UID:58A6-5CD3DC80-1-306F9400 SUMMARY:Dr. Eran Palti (MPP Münich) LOCATION:Hörsaal 0'310\, Erwin Schrödinger Zentrum\, Rudower Chaussee 26\, 12489 Berlin DESCRIPTION:Title: The Swampland and Emergence\n\nAbstract: The Swampland p rogram aims to distinguish effective field theories that can be consistent ly completed into quantum gravity in the ultraviolet from those which cann ot. It has lead to a number of proposals\, or conjectures\, regarding the required properties of effective theories. I will review some of the evide nce for these and propose that they arise due to a particular aspect of du ality where propagating fields in the infrared are emergent from the colle ctive properties of infinite towers of states. Time permitting\, I will di scuss some applications of the conjectures\, in particular to accelerating cosmologies and to massive spin-2 fields. CLASS:PUBLIC CATEGORIES:Seminar CREATED:20190509T075842Z DTSTAMP:20190509T075842Z LAST-MODIFIED:20190509T075950Z DTSTART;TZID=Europe/Berlin:20190517T133000 DTEND;TZID=Europe/Berlin:20190517T143000 TRANSP:OPAQUE X-SOGO-SEND-APPOINTMENT-NOTIFICATIONS:NO SEQUENCE:1 END:VEVENT BEGIN:VEVENT UID:591B-5CD3DE00-B-449AA100 SUMMARY:CANCELLED - Dr. Claudia Frugiuele (CERN) DESCRIPTION:Title: A new quest for physics beyond the Standard Model\n\nAbs tract: The hunt for physics beyond the Standard Model is at the dawn of a new era: the quest for dark sectors. These consist of light sub-GeV partic les very weakly coupled to the visible sector\, and they are ubiquitous i n many scenarios addressing important open questions such as the microscop ic identity of dark matter or the origin of neutrino masses and mixing. Da rk sectors motivate novel search strategies that are drastically different than\, but complementary to\, those at traditional high-energy colliders. Furthermore\, several ongoing experiments\, if properly tailored\, could play a crucial role in the hunt for dark sectors. I will discuss how the d istinctive signatures of such physics can already be searched for with ex isting/planned experiments\, including neutrino-proton fixed-target experi ments and precision atomic measurements. CLASS:PUBLIC CREATED:20190509T080107Z DTSTAMP:20190509T080107Z LAST-MODIFIED:20190603T124000Z DTSTART;TZID=Europe/Berlin:20190603T151500 DTEND;TZID=Europe/Berlin:20190603T161500 TRANSP:OPAQUE LOCATION:Christian-Gerthsen-Hörsaal\, Lise-Meitner-Haus\, Newtonstraße 15\, 12489 Berlin CATEGORIES:Seminar SEQUENCE:1 END:VEVENT BEGIN:VEVENT UID:62F0-624AEE00-11-9F64470 SUMMARY:Prof. Kirill Melnikov (TTP\, Karlsruhe) LOCATION:IRIS 1\,221 & Zoom DESCRIPTION:Title: Precision collider physics and non-perturbative effects \n\nAbstract: Recent progress in understanding QCD at the perturbative lev el led to the possibility to perform precision studies at lepton and even hadron colliders that go well beyond of what was considered possible earli er. Given this remarkable progress a question about possible non-perturb ative effects and their impact on precision collider observables becomes relevant. In this talk I will discuss a few examples where improved unde rstanding of non-perturbative effecs in collider physics would be desira ble\, and describe early attempts to make progress in this direction.\n\ nCoffee\, tea and cookies will be available in the common room before the colloquium. CLASS:PUBLIC CATEGORIES:Seminar CREATED:20220404T104047Z DTSTAMP:20220404T104047Z LAST-MODIFIED:20220607T104101Z DTSTART;TZID=Europe/Berlin:20220617T140000 DTEND;TZID=Europe/Berlin:20220617T150000 TRANSP:OPAQUE SEQUENCE:2 END:VEVENT BEGIN:VEVENT UID:62F2-624ACA80-31-6872B780 SUMMARY:Prof. James Drummond (Southampton U.) LOCATION:Zoom Webinar (see qft-colloquium email for meeting ID/link) DESCRIPTION:Title: Geometric properties of scattering amplitudes\n\nAbstrac t: I will review a number of geometric approaches to understanding propert ies of scattering amplitudes. In particular we will discuss the relation o f the geometry of the kinematical space to the analytic behaviour of ampli tudes as functions on this space. Our focus will be on massless scattering amplitudes with N=4 super Yang-Mills theory as a guiding example\, where cluster algebras of Grassmannian spaces play a central role. CLASS:PUBLIC CATEGORIES:Seminar CREATED:20220404T104047Z DTSTAMP:20220404T104047Z LAST-MODIFIED:20220422T125035Z DTSTART;TZID=Europe/Berlin:20220429T140000 DTEND;TZID=Europe/Berlin:20220429T150000 TRANSP:OPAQUE END:VEVENT BEGIN:VEVENT UID:656C-5F9A6F80-D-4FB19200 SUMMARY:Prof. Dr. Johanna Erdmenger (Würzburg U.) DESCRIPTION:Title: Gauge/gravity duality for composite Higgs models and th e top mass\n\nAbstract: Composite Higgs models are Beyond the Standard Mod el approaches involving a strongly coupled sector in which the Higgs parti cle is a Goldstone boson of a spontaneously broken symmetry\, in analogy t o pions in QCD. I will discuss gauge/gravity dual descriptions of explicit realizations of composite Higgs models using insights from non-conformal examples of the AdS/CFT correspondence. I will explain how to calculate particle masses and decay constants for proposed Sp(4) and SU(4) gauge th eories. The results obtained compare favourably to lattice gauge theory st udies and go beyond those due to a greater flexibility in choosing the fer mion content. That content changes the running of the couplings and its c hoice can lead to sizable changes in the bound state masses. The `top part ners' present in composite Higgs are modelled by dual fermionic fields i n the bulk. Including suitable higher dimension operators can ensure a to p mass consistent with the Standard Model.\n\nFor Zoom Meeting ID or link\ , see the announcement email from the qft-colloquium mailing list\, or wri te to Agostino Patella (agostino.patella@physik.hu-berlin.de). CLASS:PUBLIC CREATED:20190509T080107Z DTSTAMP:20190509T080107Z LAST-MODIFIED:20201214T115739Z DTSTART;TZID=Europe/Berlin:20201216T140000 DTEND;TZID=Europe/Berlin:20201216T150000 TRANSP:OPAQUE LOCATION:Zoom Webinar (see qft-colloquium email for meeting ID/link) CATEGORIES:Seminar SEQUENCE:12 END:VEVENT BEGIN:VEVENT UID:66B2-5CD3DE80-7-6B69D300 SUMMARY:Prof. Dr. Pedro Schwaller (Mainz U) DESCRIPTION:Title: Audible Axions\n\nAbstract: Gravitational wave observati ons provide a new and unique window into the early universe. I will start by explaining why this is the case\, and give an overview of new physics s cenarios that give rise to a stochastic gravitational wave background in t he early universe\, and therefore may be testable by future gravitational wave observations. Then I will focus on the audible axion scenario\, a cla ss of axion models whose cosmological evolution leaves an observable impri nt in the gravitational wave background. This allows a new and unique prob e of very high scale axions\, with symmetry breaking scales close to the G UT or string scale. CLASS:PUBLIC CREATED:20190509T080107Z DTSTAMP:20190509T080107Z LAST-MODIFIED:20190626T082652Z DTSTART;TZID=Europe/Berlin:20190701T151500 DTEND;TZID=Europe/Berlin:20190701T161500 TRANSP:OPAQUE LOCATION:Christian-Gerthsen-Hörsaal\, Lise-Meitner-Haus\, Newtonstraße 15\, 12489 Berlin CATEGORIES:Seminar SEQUENCE:2 END:VEVENT BEGIN:VEVENT UID:6CF0-5DB6CC80-5-4C78E600 SUMMARY:Prof. Dr. Christopher Hull (Imperial College London) DESCRIPTION:Title: What is String Theory?\n\nAbstract: The status of string theory will be examined\, and what is known and what is unknown about the theory will be discussed.\nString theory has special duality symmetries t hat do not occur in conventional field theories\, and some of the implicat ions of these will be explored\, and the implications for the nature of sp ace-time will be investigated. CLASS:PUBLIC CREATED:20190509T080107Z DTSTAMP:20190509T080107Z LAST-MODIFIED:20191115T115404Z DTSTART;TZID=Europe/Berlin:20191122T133000 DTEND;TZID=Europe/Berlin:20191122T143000 TRANSP:OPAQUE LOCATION:Konferenzraum 0'119\, Erwin Schrödinger-Zentrum\, Rudower Chaussee 26\, 12489 Berlin CATEGORIES:Seminar SEQUENCE:5 END:VEVENT BEGIN:VEVENT UID:6F72-5F895300-D-23EF1F80 SUMMARY:Prof. Dr. Pierpaolo Mastrolia (Università degli Studi di Padova) DESCRIPTION:Title: Diagrams\, Interactions and Intersections\n\nAbstract: H igh energy particle collisions are an ideal framework for accessing\nnew i nformation on matter constituents and forces of Nature. Advances\nin Theor etical Physics depend on our ability to describe the\nscattering processes among elementary particles at very high accuracy.\nTheoretical Physicists calculate scattering amplitudes\, numbers that\nare related to the probab ilities of different aftermath of particle\nscattering\, which encode the chance that a given set of particles will\nturn into certain other particl es after an impact. Feynman graphs are\na convenient way to represent part icle collisions.\nThe mathematical methods required to describe scattering events which\ntake place from the smallest to the largest scale of the Un iverse\nbenefit from concepts borrowed from the rich research in mathemati cal\ndisciplines\, such as (differential and algebraic) Geometry\, Topolog y\nand Number Theory. In this seminar\, I elaborate on the diagrammatic\na pproach to Fundamental Interactions via Scattering Amplitudes and\nFeynman integrals\, and on their algebraic properties which have been\nrecently u nderstood to be ruled by Intersection Numbers: a novel\nconnection between Physics and Mathematics.\n\nFor Zoom Meeting ID or link\, see the announc ement email from the qft-colloquium mailing list\, or write to Agostino Pa tella (agostino.patella@physik.hu-berlin.de). CLASS:PUBLIC CREATED:20190509T080107Z DTSTAMP:20190509T080107Z LAST-MODIFIED:20210201T105406Z DTSTART;TZID=Europe/Berlin:20210129T133000 DTEND;TZID=Europe/Berlin:20210129T143000 TRANSP:OPAQUE LOCATION:Zoom Webinar (see qft-colloquium email for meeting ID/link) CATEGORIES:Seminar SEQUENCE:9 END:VEVENT BEGIN:VEVENT UID:71D4-5DB6CE00-87-21A90C00 SUMMARY:Prof. Dr. Nazario Tantalo (Roma Tor Vergata) DESCRIPTION:Title: QED corrections to hadronic decays on the lattice\n\nAbs tract: QED radiative corrections to hadronic observables are generally rat her small but they become phenomenologically relevant when the target prec ision is at the percent level. This is the case of leptonic and semilepton ic decays of light and heavy pseudoscalar mesons. On the one hand\, QED r adiative corrections to hadronic observables can be calculated with the re quired non-perturbative accuracy by using lattice techniques. On the other hand\, the inclusion of electromagnetic interactions in a lattice calcula tion is a challenging problem because QED is a long-range unconfined inter action and numerical simulations necessarily require a finite volume. The problem is particularly delicate in the case of QED radiative corrections to decay rates because of the appearance of infrared divergences (proporti onal to the logarithm of the lattice volume) at intermediate stages of the calculations. In this talk I will briefly review the recent theoretical a dvances that opened the way to realistic non-perturbative simulations of Q CD+QED\, discuss a method that allows to calculate QED radiative correctio ns to hadronic decay rates and present the results of a non-perturbative c alculation of the leptonic decay rates P-> l nu (gamma) in the case of lig ht (P=pi\,K) and charmed (P=D\,Ds) pseudoscalar mesons. CLASS:PUBLIC CREATED:20190509T080107Z DTSTAMP:20190509T080107Z LAST-MODIFIED:20200106T100411Z DTSTART;TZID=Europe/Berlin:20200110T133000 DTEND;TZID=Europe/Berlin:20200110T143000 TRANSP:OPAQUE LOCATION:Konferenzraum 0'119\, Erwin Schrödinger-Zentrum\, Rudower Chaussee 26\, 12489 Berlin CATEGORIES:Seminar SEQUENCE:6 END:VEVENT BEGIN:VEVENT UID:7503-5BE2ED00-5-7EB0BF80 SUMMARY:Dr. Yotam Soreq (CERN) LOCATION:Christian-Gerthsen-Hörsaal\, Lise-Meitner-Haus\, Newtonstraße 15\, 12489 Berlin CLASS:PUBLIC CATEGORIES:Seminar CREATED:20181107T134733Z DTSTAMP:20181107T134733Z LAST-MODIFIED:20181205T072417Z DTSTART;TZID=Europe/Berlin:20181211T151500 DTEND;TZID=Europe/Berlin:20181211T161500 TRANSP:OPAQUE X-SOGO-SEND-APPOINTMENT-NOTIFICATIONS:NO DESCRIPTION:Title: The Quest for New Physics\n\nAbstract:\nThe Standard Mod el of particle physics well describes a vast number of observables up to t he TeV scale. However\, it cannot be a complete description of Nature as i t cannot explain various experimental observations. For example\, it lacks a viable dark matter candidate and can neither explain the observed matte r/antimatter asymmetry of our Universe nor neutrino oscillations. \nThus\, physics beyond the Standard Model is well motivated. \nIn this colloquium \, we explore different methods to probe new physics at multiple energy sc ales\, from high energy colliders\, such as the LHC\, to precision low ene rgy experiments. In particular\, we focus on searches for new force carrie rs at the LHCb experiment and in precision atomic spectroscopy and for axi on like particles at the GeV Scale. We show that the inclusive search for dark photons at the LHCb experiment already probes new parameter space and can be easily interpreted for a large variety of new physics models. On t he precision frontier\, we explore the potential of isotope shift spectros copy to probe new long range force carriers. \n END:VEVENT BEGIN:VEVENT UID:77AB-5BDAE180-7-46F5D800 SUMMARY:Prof. Dr. Niklas Beisert (ETH Zürich) LOCATION:Christian-Gerthsen-Hörsaal\, Lise-Meitner-Haus\, Newtonstraße 15\, 12489 Berlin DESCRIPTION:Title: Yangian Symmetry and Integrability of Planar N = 4 SYM\n \nAbstract: This talk is about integrability of planar N=4 super Yang-Mill s theory. I will review the notion of integrability in the AdS/CFT context and what it means for planar scattering and Wilson loops including select ed results. I will then present a concrete notion of the corresponding Yan gian symmetry in this model\, show that it holds true\, and discuss the (p erturbative) implications for correlation functions and Wilson loops. CLASS:PUBLIC CREATED:20181101T112507Z DTSTAMP:20181101T112507Z LAST-MODIFIED:20181106T122142Z DTSTART;TZID=Europe/Berlin:20181113T151500 DTEND;TZID=Europe/Berlin:20181113T161500 TRANSP:OPAQUE X-SOGO-SEND-APPOINTMENT-NOTIFICATIONS:NO CATEGORIES:Seminar END:VEVENT BEGIN:VEVENT UID:7EFD-5F9A6F80-4F-6B58A600 SUMMARY:Prof. Dr. Gaetan Borot (HU) DESCRIPTION:Title: W-algebras: between representation theory\, 2d geometry and 5d gauge theories\n\nAbstract: W-algebras associated to simple Lie alg ebras are non-linear generalisations of the Virasoro algebra\, from which certain CFTs can be defined. Using a formalism of Kontsevich and Soibelman and representation theory of W-algebras via free fields (when this exist) \, one can construct from them systems of PDEs whose solution is computed by a "topological recursion". Such solutions carry information about 2d (w orldsheet) geometry\, and "topological recursion" mean this information is reached by induction on the Euler characteristic that resembles a cutting /pasting approach. They are sometimes expressible as integrals on the mod uli space of complex curves or as topological string A-model amplitudes (f or certain target spaces)\, and gives suitable definition of topological s tring B-model for certain type of complex 1d singularities. I will give an overview of these connections\, and describe if time permits sketch a mor e recent link (ongoing work) to Nekrasov partition functions in 5d gauge t heories (in which W-algebra are known to appear since Alday-Gaiotto-Tachik awa proposal). This is based on joint works with Andersen\, Chekhov\, Oran tin\, Bouchard\, Chidambaram\, Creutzig\, Noshchenko\, Kramer\, Schüler.\n \nFor Zoom Meeting ID or link\, see the announcement email from the qft-co lloquium mailing list\, or write to Agostino Patella (agostino.patella@phy sik.hu-berlin.de). CLASS:PUBLIC CREATED:20190509T080107Z DTSTAMP:20190509T080107Z LAST-MODIFIED:20210201T105331Z DTSTART;TZID=Europe/Berlin:20210226T133000 DTEND;TZID=Europe/Berlin:20210226T143000 TRANSP:OPAQUE LOCATION:Zoom Webinar (see qft-colloquium email for meeting ID/link) CATEGORIES:Seminar SEQUENCE:10 END:VEVENT BEGIN:VEVENT UID:C303B-63440800-11-F3D0D50 SUMMARY:Prof. Renate Loll (Radboud University Nijmegen) LOCATION:IRIS 1\,221 CLASS:PUBLIC CATEGORIES:Seminar X-SOGO-SEND-APPOINTMENT-NOTIFICATIONS:NO TRANSP:OPAQUE DTSTART;TZID=Europe/Berlin:20221125T140000 DTEND;TZID=Europe/Berlin:20221125T153000 CREATED:20221010T115501Z DTSTAMP:20221010T115501Z LAST-MODIFIED:20221118T112935Z SEQUENCE:2 DESCRIPTION:Title: Quantum Gravity and Quantum Ricci Curvature \n\nAbstract : Researchers in quantum gravity look for a theoretical and quantitative u nderstanding of the dynamics of spacetime near the ultrashort Planck scale \, which is believed to be governed by large quantum fluctuations and ther efore cannot be described by perturbation theory about solutions to the cl assical Einstein equations. A powerful nonperturbative methodology is that of "random geometry"\, the study of continuum limits of statistical ensem bles of piecewise flat simplicial manifolds consisting of equilateral tria ngular building blocks. While systems of two-dimensional random geometry i n Riemannian signature provide analytically soluble toy models and illustr ate the viability of the method\, physical quantum gravity requires an imp lementation in four dimensions and Lorentzian signature. \n\nThe formulati on of Causal Dynamical Triangulations (CDT)\, which builds on the principl es of random geometry\, is a quantum-gravitational analogue of what lattic e QCD is to nonabelian gauge theory. It has allowed us to move away from f ormal considerations in quantum gravity to extracting quantitative results on the spectra of invariant quantum observables\, describing physics near the Planck scale. A breakthrough result of CDT quantum gravity in four di mensions is the emergence\, from first principles\, of a nontrivial\, nonp erturbative vacuum state with properties of a de Sitter universe. I will s ummarize these findings\, highlighting the unusual character of observable s in quantum gravity\, and describe some of the interesting physical quest ions that are being explored using the new notion of quantum Ricci curvatu re. END:VEVENT BEGIN:VEVENT UID:DE132-652D3F00-1-1A0E9260 SUMMARY:Dr. Andrea Puhm (CPHT\, Ecole Polytechnique\, Palaiseau cedex) LOCATION:IRIS 1.221 CLASS:PUBLIC CATEGORIES:Seminar X-SOGO-SEND-APPOINTMENT-NOTIFICATIONS:NO TRANSP:OPAQUE DTSTART;TZID=Europe/Berlin:20240524T140000 DTEND;TZID=Europe/Berlin:20240524T153000 CREATED:20221010T115501Z DTSTAMP:20221010T115501Z LAST-MODIFIED:20240519T072508Z SEQUENCE:14 DESCRIPTION:Title: Soft Symmetries of the S-Matrix\n\nAbstract: Over the pa st decade significant progress has been made towards tackling the challeng ing question: What are (all) the symmetries of Nature? Key to this has bee n the realization that gravity in the infrared manifests itself in seeming ly different yet equivalent ways known as asymptotic symmetries\, soft the orems\, and memory effects\, and these developments form the foundation to wards formulating a holographic principle for quantum gravity in our world . In turn the recent progress in the emergent field of ``celestial hologra phy'' has shed light on the amount (spoiler: it's infinite!) of symmetrie s. I will review these novel developments and then focus on how gauge theo ries and perturbative gravity in four dimensions are governed by a tower o f infinite-dimensional symmetries that arise from soft factorization theor ems of the S-matrix involving low-energy ("soft") massless particles. A ne w twist arises due to the long-range nature of gravity which results in ne w soft theorems with logarithmic (rather than power-law) dependence on the energy of the soft particle. I will conclude this talk by giving a symmet ry interpretation for the leading logarithmic soft theorems which\, by vir tue of being universal and all-loop exact\, is a key element for a hologra phic principle in spacetimes with flat asymptotics. END:VEVENT BEGIN:VEVENT UID:DE9FE-652D3E80-3-232D2CC SUMMARY:Prof. Pietro Longhi (Uppsala U) LOCATION:IRIS 1.221 CLASS:PUBLIC CATEGORIES:Seminar X-SOGO-SEND-APPOINTMENT-NOTIFICATIONS:NO TRANSP:OPAQUE DTSTART;TZID=Europe/Berlin:20240119T140000 DTEND;TZID=Europe/Berlin:20240119T153000 CREATED:20221010T115501Z DTSTAMP:20221010T115501Z LAST-MODIFIED:20240105T160501Z SEQUENCE:14 DESCRIPTION:Title: Partition functions of 4d N=2 theories in the strong cou pling regime\n\nAbstract: Quantum field theories with 4d N=2 supersymmetry provide a rich theoretical laboratory where fundamental questions about n onperturbative dynamics can be studied by means of exact techniques\, rang ing from confinement in N=2 Yang-Mills theory\, to the study of defects\, and to recent progress on the BPS particle spectrum of these theories. In this talk I will recollect how these developments have shed new light on t heories that lack a Lagrangian description\, focusing on the question of w hat replaces the standard definition of the partition function based on th e path integral\, and how such an object may be computed. I will discuss a proposal based on isomonodromic tau functions of quantum curves associate d to 4d N=2 QFTs\, and will argue that this definition generalises the sta ndard one based on the path integral\, which is recovered in the weak coup ling limit. This talk is based on joint work with Ioana Coman and Joerg Te schner. END:VEVENT BEGIN:VEVENT UID:E069E-652D4300-9-3690EC0 SUMMARY:TBA LOCATION:IRIS 1.221 CLASS:PUBLIC CATEGORIES:Seminar X-SOGO-SEND-APPOINTMENT-NOTIFICATIONS:NO TRANSP:OPAQUE DTSTART;TZID=Europe/Berlin:20250207T140000 DTEND;TZID=Europe/Berlin:20250207T153000 CREATED:20221010T115501Z DTSTAMP:20221010T115501Z LAST-MODIFIED:20240913T103103Z SEQUENCE:18 DESCRIPTION:Title: TBA\n\nAbstract: TBA END:VEVENT BEGIN:VEVENT UID:E0CD8-652D4380-3-7F816080 SUMMARY:Prof. Dr. Tanja Hinderer (Utrecht U) LOCATION:IRIS 1.221 CLASS:PUBLIC CATEGORIES:Seminar X-SOGO-SEND-APPOINTMENT-NOTIFICATIONS:NO TRANSP:OPAQUE DTSTART;TZID=Europe/Berlin:20231124T140000 DTEND;TZID=Europe/Berlin:20231124T153000 CREATED:20221010T115501Z DTSTAMP:20221010T115501Z LAST-MODIFIED:20231117T081406Z SEQUENCE:15 DESCRIPTION:Title: Probing subatomic physics with gravitational waves from binary neutron star inspirals\n\nAbstract: The gravitational wave signals from inspiraling binary systems carry unique information about the nature and internal structure of the compact objects\, encoded\, for instance\, i n signatures from tidal effects. For neutron stars\, which contain matter compressed by strong gravity to supranuclear densities\, this opens unique opportunities to advance our understanding of subatomic physics in largel y unexplored regimes. I will discuss examples of characteristic signatures of matter and recent progress in understanding and modeling them. I will also summarize what we have learned from recent measurements and conclude with an outlook onto the remaining challenges and exciting prospects for t he next years as gravitational-wave science continues to move towards an e ra of precision physics. END:VEVENT BEGIN:VEVENT UID:E0CDA-652D4380-1-1B27E380 SUMMARY:Prof. Dr. Lorenzo Tancredi (Technische Universität München) LOCATION:IRIS 1.221 CLASS:PUBLIC CATEGORIES:Seminar X-SOGO-SEND-APPOINTMENT-NOTIFICATIONS:NO TRANSP:OPAQUE DTSTART;TZID=Europe/Berlin:20240216T140000 DTEND;TZID=Europe/Berlin:20240216T153000 CREATED:20221010T115501Z DTSTAMP:20221010T115501Z LAST-MODIFIED:20240212T101148Z SEQUENCE:17 DESCRIPTION:Title: Scattering Amplitudes for Precision Physics: how mathema tics informs fundamental physics\n\nAbstract: In this seminar\, I will des cribe recent discoveries of unexpected connections between abstract branch es of mathematics and theoretical particle physics.\nAt the core of this c onnection\, is the use of methods from algebraic geometry and number theor y\, to develop a new understanding of scattering amplitudes.\nIn particula r\, I will elaborate on how these new ideas are fuelling a revolution in o ur approach to the calculation of scattering amplitudes relevant for\npart icle collider physics and\, more recently\, also for applications in cosmo logy. END:VEVENT BEGIN:VEVENT UID:E5D-5DB6CD80-CB-79D22980 SUMMARY:Prof. Dr. Marika Taylor (Southampton U) DESCRIPTION:Title: New anomalies in superconformal field theories\n\nAbstra ct: In recent years there has been considerable interest in computing part ition functions of supersymmetric field theories on curved backgrounds usi ng localisation methods. These computations led to a rather surprising dis covery: supersymmetry is anomalous in 4d N=1 SCFTs with anomalous R symmet ry. This talk will explain the origin of this anomaly\, using both Wess-Zu mino consistency conditions and perturbative arguments. The anomaly first arises in one loop contributions to four point functions involving two glo bal currents and two supercurrents\, in a way that is directly analogous t o the usual triangle anomaly. We will conclude by discussing the implicati ons of this anomaly. CLASS:PUBLIC CREATED:20190509T080107Z DTSTAMP:20190509T080107Z LAST-MODIFIED:20191208T195517Z DTSTART;TZID=Europe/Berlin:20191213T133000 DTEND;TZID=Europe/Berlin:20191213T143000 TRANSP:OPAQUE LOCATION:Konferenzraum 0'119\, Erwin Schrödinger-Zentrum\, Rudower Chaussee 26\, 12489 Berlin CATEGORIES:Seminar SEQUENCE:6 END:VEVENT BEGIN:VEVENT UID:E5D-607ED700-219-68B27200 SUMMARY:Dr. Emanuel Malek (HU) DESCRIPTION:Title: Exceptional Field Theory and applications to the AdS/CFT correspondence\n\nAbstract: The AdS/CFT correspondence is a powerful tool for studying strongly coupled QFTs by performing computations in string t heory and its low energy limit\, supergravity. I will review Exceptional F ield Theory\, a formalism that unifies gravitational and flux degrees of f reedom of supergravity\, and thereby makes a large exceptional symmetry gr oup manifest. This large symmetry group simplifies many complicated calcul ations in AdS backgrounds\, such as constructing consistent truncations or computing the spectrum of linearised fluctuations around AdS vacua. I wil l show how this can be used to gain insights into strongly coupled QFTs. F inally\, it time permits\, I will discuss applications to non-supersymmetr ic AdS vacua.\n\nFor Zoom Meeting ID or link\, see the announcement email from the qft-colloquium mailing list\, or write to Agostino Patella (agost ino.patella@physik.hu-berlin.de). CLASS:PUBLIC CREATED:20190509T080107Z DTSTAMP:20190509T080107Z LAST-MODIFIED:20210420T141606Z DTSTART;TZID=Europe/Berlin:20210430T140000 DTEND;TZID=Europe/Berlin:20210430T150000 TRANSP:OPAQUE LOCATION:Zoom Webinar (see qft-colloquium email for meeting ID/link) CATEGORIES:Seminar SEQUENCE:11 END:VEVENT X-WR-CALNAME:QFT Colloquium (Prof. Dr. Agostino Patella ) END:VCALENDAR