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	Séminaires à venir dans la série RENC-THEO
[ vue agenda ]

Jeudi 18 Décembre 2025, 10:00 à IHP, Amphi Darboux RENC-THEO (Rencontres Théoriciennes) hep-th

Markus Dierigl ( CERN ) The importance of being discrete

Abstract: In this talk I will highlight the importance of discrete data in gauge and gravitational theories. In particular I will describe the classification of deformation classes of spacetime manifolds equipped with these discrete structures (such as discrete gauge fields). These are important for the determination of (topological) global symmetries and anomalies of the underlying theory. In case of quantum gravity theories we expect all global symmetries to be absent and an inclusion of certain defects is required. Finally, I will also describe a strategy to bound allowed discrete gauge symmetries in theories of quantum gravity.

Jeudi 18 Décembre 2025, 11:30 à IHP, Amphi Darboux RENC-THEO (Rencontres Théoriciennes) hep-th

Oscar Varela ( utah state university, ift madrid ) Exceptional generalised geometry and the class S superconformal index

Abstract: The characterisation of the physics of the M5-brane remains an important open problem in string theory. While the superconformal field theory that resides on planar M5-brane in flat space is poorly understood, other configurations involving M5-brane wrapped on certain manifolds have well-known superconformal field theory descriptions of so-called class S. In this talk, I will use new methods based on exceptional generalised geometry/field theory to describe the gravity duals of class S field theories and provide, for the first time, a holographic match of their superconformal index.

Jeudi 8 Janvier 2026, 10:00 à IHP, Room Yvette Cauchois (Perrin building) RENC-THEO (Rencontres Théoriciennes) hep-th

Romuald Janik ( Jagiellonian U. ) TBA

Abstract: TBA

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Jeudi 18 Décembre 2025, 10:00 à IHP, Amphi Darboux	RENC-THEO (Rencontres Théoriciennes)	hep-th
Markus Dierigl ( CERN )	The importance of being discrete
Abstract:	In this talk I will highlight the importance of discrete data in gauge and gravitational theories. In particular I will describe the classification of deformation classes of spacetime manifolds equipped with these discrete structures (such as discrete gauge fields). These are important for the determination of (topological) global symmetries and anomalies of the underlying theory. In case of quantum gravity theories we expect all global symmetries to be absent and an inclusion of certain defects is required. Finally, I will also describe a strategy to bound allowed discrete gauge symmetries in theories of quantum gravity.