Chiral dynamics in the low-temperature phase of QCD

Bastian B. Brandt, Anthony Sebastian Francis, Harvey B. Meyer, Daniel Robaina

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

We investigate the low-temperature phase of QCD and the crossover region with two light flavors of quarks. The chiral expansion around the point (T,mq = 0) in the temperature vs. quark-mass plane indicates that a sharp real-time excitation exists with the quantum numbers of the pion. We determine its dispersion relation and test the applicability of the chiral expansion. The time-dependent correlators are also analyzed using the Maximum Entropy Method (MEM), yielding consistent results. Finally, we test the predictions of ordinary chiral perturbation theory around the point (T = 0,mq = 0) for the temperature dependence of static observables. Around the crossover temperature, we find that all quantities considered depend only mildly on the quark mass in the considered range 8MeV ≤ mMS ≤ 15MeV.

Original languageEnglish
Title of host publication32nd International Symposium on Lattice Field Theory
VolumePart F130500
StatePublished - Jun 2014
Event32nd International Symposium on Lattice Field Theory, LATTICE 2014 - New York, United States
Duration: 23 Jun 201428 Jun 2014

Publication series

NameProceedings of Science
PublisherSissa Medialab Srl

Conference

Conference32nd International Symposium on Lattice Field Theory, LATTICE 2014
Country/TerritoryUnited States
CityNew York
Period23/06/1428/06/14

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