Nuclear Physics Colloquium
Location: FIAS, Science Campus Riedberg,
Ruth-Moufang-Str. 1, lecture room 100
Time: Thursday, December 20, 2012, 13:00-14:00 (plus
10min for discussion)
Contact: hees@fias.uni-frankfurt.de
New approach to the local strong parity violation in the quark-gluon
plasma
Tigran Kalaydzhyan (DESY Hamburg)
I would like to present our recent progress in understanding the local
strong P- and CP-violation in the quark-gluon plasma (QGP). The physics of
the violation is due to the presence of non-trivial gluonic fields, which
induce a local imbalance between densities of left- and right-handed quarks.
Under specific circumstances (such as e.g. extremely strong electromagnetic
fields) this imbalance can lead to macroscopic electric currents potentially
observable in ongoing heavy-ion experiments. I will focus on a novel "chiral
superfluid" approach to the problem, where we derive a new effective theory
of QCD at the range of temperatures relevant for the heavy-ion collisions.
The main idea of the model is the presence of a new light axion-like
dynamical degree of freedom within QCD. This new axion-like field, being a
bosonized version of near-zero fermionic modes, accommodates the essential
chiral properties of the QGP and, together with thermalized quarks and
gluons, forms a two-component fluid. The dynamics of the fluid turns out to
be governed by a system of equations similar to one of a superfluid. I will
also comment on possible experimental tests of the model.
Nuclear Physics Colloquium homepage