You are here

"The chiral anomaly, Berry’s phase and chiral kinetic theory from world-lines in quantum field theory"

Raju Venugopalan, Brookhaven National Laboratory
Monday, May 15, 2017 - 2:00pm to 3:00pm
PAT C-421

Topological
transitions that induce a chirality imbalance in a deconfined
quark-gluon plasma (QGP) generate an electromagnetic current in the
direction of an external magnetic field.
This
re
markable phenomenon, the Chiral Magnetic Effect, has been observed in
condensed matter systems. In heavy-ion collisions, an interesting
question of phenomenological relevance is how the chiral imbalance
generated persists through a fluctuating background of sphalerons in
addition to other ``non-anomalous” interactions with the QGP. To address
this question, we construct a relativistic chiral kinetic theory using
a world-line formulation of quantum field theory. This permits an
intuitive and elegant interpretation of chiral kinetic dynamics in terms
of a supersymmetric world-line action for spinning, colored,
Grassmanian point particles in external backgrounds. We outline how
Berry’s phase arises in this framework, and how its effects can be
clearly distinguished from those arising from the chiral anomaly.
Finally, we discuss the
applications of our framework to discuss the transport of chiral fermions in other many-body contexts.


References:


[1] The chiral anomaly, Berry's phase and chiral kinetic theory, from world-lines in quantum field theory, N. Mueller and R. Venugopalan, arXiv:1701.03331 [hep-ph], submitted to Phys. Rev. Lett


[2] World-line construction of a covariant chiral kinetic theory, N. Mueller and R. Venugopalan, arXiv:1702.01233 [hep-ph], submitted to Phys. Rev. D



Subcalendar: 
Event Type: 
Share