22-28 July 2010
Palais des Congrès de Paris
Europe/Paris timezone

Phase diagram of hot QCD in an external magnetic field

22 Jul 2010, 10:15
12m
Salle 253 ()

Salle 253

Parallel Session Talk 08 - Heavy Ion Collisions and Soft Physics at Hadron Colliders 08 - Heavy Ion Collisions and Soft Physics at Hadron Colliders

Speaker

Prof. Eduardo Fraga (Instituto de Fisica, Universidade Federal do Rio de Janeiro)

Description

The structure of the phase diagram for strong interactions becomes richer in the presence of a magnetic background, which enters as a new control parameter for the thermodynamics, and can exhibit new phases and interesting features. Motivated by the relevance of this physical setting for current and future high-energy heavy ion collision experiments and for the cosmological QCD transitions, we use the linear sigma model coupled to quarks and to Polyakov loops as an effective theory to investigate how the chiral and the deconfining transitions are affected, and present a general picture for the temperature-magnetic field phase diagram. We compute and discuss each contribution to the effective potential for the approximate order parameters, and uncover new phenomena such as the paramagnetically-induced breaking of Z(3).

Primary authors

Ms Ana J\'ulia Mizher (Instituto de F\'\i sica, Universidade Federal do Rio de Janeiro) Prof. Eduardo Fraga (Instituto de Fisica, Universidade Federal do Rio de Janeiro) Dr Maxim Chernodub (LMPT, CNRS UMR 6083, F\'ed\'eration Denis Poisson, Universit\'e de Tours)

Presentation Materials