Gauge/Gravity Duality 2015

Session

Afternoon session

13 Apr 2015, 14:20

The Galileo Galilei Institute for Theoretical Physics (GGI)

9. Generalized Global Symmetries

Nathan Seiberg

13/04/2015, 14:20

We will discuss in a systematic way a generalization of ordinary global symmetries, whose charged operators are line operators, surface operators, etc., and whose charged excitations are strings, membranes, etc. Many of the properties of ordinary global symmetries apply here. They lead to Ward identities and hence to selection rules on amplitudes. Such global symmetries can be coupled to...

10. The Holographic Goldstino

Matteo Bertolini

13/04/2015, 15:00

We find the fingerprints of the Goldstino associated to spontaneous supersymmetry breaking at strong coupling, using holography. The Goldstino massless pole arises in two-point correlators of the supercurrent, due to contact terms in supersymmetry Ward identities. We show how these contact terms are obtained from the holographic renormalization of the gravitino sector, independently of the...

11. Rigid Holography and the 6D (2,0) CFT on AdS_5*S^1

Micha Berkooz

13/04/2015, 15:40

Field theories on anti-de Sitter (AdS) space can be studied by realizing them as low-energy limits of AdS vacua of string/M theory. In an appropriate limit, the field theories decouple from the rest of string/M theory. Since these vacua are dual to conformal field theories, this relates some of the observables of these field theories on anti-de Sitter space to a subsector of the dual conformal...

16. Quark mass in backreacted holographic QCD

Matti Jarvinen

13/04/2015, 16:40

QCD has an interesting dependence on the quark mass, in particular near the edge of the conformal window at large N_f. This can be studied by using holographic bottom-up models for QCD in the Veneziano limit (V-QCD) where the flavor fully backreacts to the glue. I will sketch the phase diagram as a function of the quark mass and x=N_f/N_c, and discuss phenomena such as the hyperscaling...

17. Nuclear shadowing in the holographic framework

Pietro Colangelo

13/04/2015, 17:10

19. Light-Front Holography and New Advances in Nonperturbative QCD

Stanley Brodsky

13/04/2015, 17:40

One of the most fundamental problems in Quantum Chromodynamics is to understand the origin of the mass scale which controls the range of color confinement and the hadronic spectrum. We show that a mass gap and a fundamental color confinement scale arise when one extends the formalism of de Alfaro, Fubini and Furlan to frame-independent light-front Hamiltonian theory. Remarkably, the resulting...