Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

The SEMPARIS seminar webserver hosts annoucements of all seminars taking place in Paris area, in all topics of physics, mathematics and computer science. It allows registered users to receive a selection of announcements by email on a daily or weekly basis, and offers the possibility to archive PDF or Powerpoint files, making it available to the scientific community.   [ More information ]


Upcoming Seminars at LPTHE
[ scheduler view ]

Thursday 20 January 2022, 11:00 at IHP, zoom
( https://zoom.us/j/97507124810 Meeting ID: 975 0712 4810 Passcode: 1234 )
RENC-THEO (Rencontres Théoriciennes) hep-th
Michael Green A Novel Expression for an Integrated Correlator (in N = 4 supersymmetric Yang–Mills theory)
Abstract: This talk will present the exact expression for an integrated correlator of four superconformal primary operators in the stress tensor multiplet of SU(N) N = 4 supersymmetric Yang-Mills, based on the localised partition function of the N = 2∗ theory. I will show that this integrated correlator can be expressed as a strikingly simple two-dimensional lattice sum. This is a function of the complex Yang–Mills coupling, and is manifestly invariant under SL(2, Z) (Montonen–Olive) duality. The correlator satisfies a powerful Laplace equation that relates its value for SU(N) to its value for SU(N−1) and SU(N+1). For finite N the correlator reproduces and extends perturbative and non-perturbative N = 4 SYM results. The large-N expansion is holographically related to the SL(2, Z)-invariant low energy expansion of the type IIB superstring four-graviton amplitude in AdS5 × S5. The talk will also describe the extension of of these results to n-point correlators with n > 4 that violate the U(1) bonus symmetry maximally.

Thursday 20 January 2022, 14:00 at IHP, zoom
( https://zoom.us/j/97507124810 Meeting ID: 975 0712 4810 Passcode: 1234 )
RENC-THEO (Rencontres Théoriciennes) hep-th
Leonardo Rastelli Carving out the space of gravitational effective field theories
Abstract: I will review recent progress on carving out the space of consistent weakly coupled gravitational effective field theories, both in flat space and in Anti de Sitter space. The main technical tools are dispersive sum rules for the S-matrix (flat space) or for CFT correlators (AdS space), which follow from the general principles of unitarity and causality. Higher derivative couplings are expected to be of order one in the units of the UV cutoff. Our approach justifies this expectation and allows to prove rigorous bounds on the order one coefficients. In particular, we prove a precise version of the conjecture that any large N CFT with a large gap must be dual to a local effective field theory in AdS.

Tuesday 25 January 2022, 14:00 at LPTHE, Library & Zoom link in comments
( Join Zoom Meeting https://cern.zoom.us/j/67310205088?pwd=cytWVUJTZTZMWjlER3JwcXF2SkxLdz09 Meeting ID: 673 1020 5088 Passcode: 127835 )
LPTHE-PPH (Particle Physics at LPTHE) hep-ph
Redamy Perez-Ramos ( LPTHE ) Hadron correlations on the search of new physics beyond the standard model in the e+e- annihilation and the LHC
Abstract: The analysis of azimuthal correlations along with jet shapes in multiparticle production can be useful to uncover the existence of new physics beyond the Standard Model, e.g., Hidden Valley, in the e + e − annihilation at high energies. In this seminar, based on previous theoretical studies and using PYTHIA8 event generator, it is found that both azimuthal and rapidity long-range correlations are enhanced due to the presence of a new stage of matter on top of the QCD partonic cascade. Ridge structures, similar to those observed at the LHC, show up providing a possible signature of new physics at future e + e −colliders. Preliminary results on pp collisions will be discussed for completeness.

Thursday 27 January 2022, 14:00 at LPTHE, Amphi Charpak LPNHE groundfloor between towers 23 and 32 and online (zoom) TQM (Theory of quantum matter) math-ph
Félix Werner ( LKB Paris ) TBA
Abstract: https://us06web.zoom.us/j/84343644046?pwd=aEFRNG96ZlZYSTJSWUtUQ0t4aHRPdz09

Thursday 27 January 2022, 14:00 at LPENS, E227a LPTENS-HE (Séminaire commun LPTENS-LPTHE) hep-th
Eric Perlmutter ( IPhT ) TBA

Thursday 10 February 2022, 14:00 at LPTHE, INSP Jussieu towers 22-23 room 3-17 and online (zoom) TQM (Theory of quantum matter) math-ph
Rebeca Ribeiro ( C2N Palaiseau ) TBA
Abstract: https://us06web.zoom.us/j/88244544737?pwd=N2dnVllwSGxKRHRRVjZFb0taNFk3QT09

Thursday 10 March 2022, 14:00 at LPTHE, INSP Jussieu towers 22-23 room 3-17 and online (zoom) TQM (Theory of quantum matter) math-ph
Benoît Douçot ( LPTHE ) TBA
Abstract: https://us06web.zoom.us/j/81226484885?pwd=K1ZRMWlrR1Y0UEIxcnJpclJHa1lUZz09 ID de réunion : 812 2648 4885 Code secret : 066997

Thursday 17 March 2022, 11:00 at LPTHE, bibliothèque du LPTHE, tour 13-14, 4eme étage SEM-DARBOUX (Séminaire Darboux - physique théorique et mathématiques) hep-th
Elba Garcia-Failde ( IMJ-PRG ) TBA

Thursday 24 March 2022, 14:00 at LPTHE, ???? TQM (Theory of quantum matter) math-ph
Andrea De Luca ( LPTM Cergy ) TBA

Thursday 19 May 2022, 11:00 at LPTHE, LPTHE library SEM-DARBOUX (Séminaire Darboux - physique théorique et mathématiques) hep-th
Hugo Duminil-Copin ( IHES ) TBA

Thursday 2 June 2022, 14:00 at LPTHE, ??? TQM (Theory of quantum matter) math-ph
Laura Messio ( LPTMC ) TBA
Abstract: TBA

Thursday 9 June 2022, 14:00 at LPTHE, ???? TQM (Theory of quantum matter) math-ph
Julia Meyer ( Université Grenoble Alpes ) TBA

seminars from series at institute
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