Tuesday 28 September 2021, 14:00 at LPTHE, Library & Zoom link in comments ( https://cern.zoom.us/j/66479327749?pwd=Z1YvUUc2OWdOMk1Xc0VaSnRLVkRVdz09 Meeting ID: 664 7932 7749 Passcode: 390396 )	LPTHE-PPH (Particle Physics at LPTHE)	hep-ph
Johannes Braathen ( DESY )	Precision calculations of the Higgs trilinear coupling to probe New Physics
Abstract:	The Higgs trilinear coupling provides a unique opportunity to probe the structure of the Higgs sector, study the nature of the electroweak phase transition, and search for New Physics. It is known that in BSM models it can deviate significantly from its SM prediction at one loop, because of non-decoupling effects in the radiative corrections from extra scalars. One may then wonder how this result is modified at two loops, and whether new large effects may appear. In this talk, I will present recent results on the calculation of leading two-loop corrections to the Higgs trilinear coupling in a range of theories with extended scalar sectors – massive models such as the Two-Higgs-Doublet Model as well as theories with classical scale invariance. I will show that, while the two-loop corrections do not modify significantly the non-decoupling effects observed at one loop, their computation is important in view of the experimental program to precisely measure the Higgs trilinear coupling at current and future colliders.

Thursday 30 September 2021, 11:00 at IHP, Zoom ( Zoom link: https://zoom.us/j/97507124810 )	RENC-THEO (Rencontres Théoriciennes)	hep-th
Eran Palti ( Ben Gourion University )	Convexity of Charged Operators in CFTs and the Weak Gravity Conjecture
Abstract:	In this talk I will introduce a particular formulation of the Weak Gravity Conjecture in AdS space in terms of the self-binding energy of a particle. The holographic CFT dual of this formulation corresponds to a certain convex-like structure for operators charged under continuous global symmetries. Motivated by this, we propose a conjecture that this convexity is a general property of all CFTs, not just those with weakly-curved gravitational duals. It is possible to test this in simple CFTs, the conjecture passes all the tests performed so far. (based on 2108.04594 )

Thursday 7 October 2021, 11:00 at LPTHE, bibliothèque du LPTHE, tour 13-14, 4eme étage	SEM-DARBOUX (Séminaire Darboux - physique théorique et mathématiques)	hep-th
Tomoyuki Arakawa ( RIMS Kyoto )	TBA

Thursday 25 November 2021, 11:00 at LPTHE, bibliothèque du LPTHE, tour 13-14, 4eme étage	SEM-DARBOUX (Séminaire Darboux - physique théorique et mathématiques)	hep-th
Claire Voisin ( IMJ-PRG )	TBA