Seminars

Abstract:  Almost 30 years ago Dima Kharzeev argued that, contrary to naive intuition, the flow of baryon number in highly inelastic high energy processes is not traced by the valence quarks but by a gluonic structure, the string junction, postulated many years earlier by Giancarlo Rossi and myself and, independently from QCD, by Xavier Artru. I will discuss recent experimental evidence in favour of this claim by using the 50+ year old Feynman-Wilson analog model adapted to the topological expansion of QCD.

Abstract:  Numerical investigation of the non-linear fate of the Aretakis instability has pointed towards the existence of a dynamical black hole solution which remains extremal and features a persistent instability and associated horizon hair forever. I will discuss how one can realize this solution analytically within JT gravity.