TY - GEN

T1 - Chiral dynamics in the low-temperature phase of QCD

AU - Brandt, Bastian B.

AU - Francis, Anthony Sebastian

AU - Meyer, Harvey B.

AU - Robaina, Daniel

N1 - Publisher Copyright:
© Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence.

PY - 2014/6

Y1 - 2014/6

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=85030122903&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:85030122903

VL - Part F130500

T3 - Proceedings of Science

BT - 32nd International Symposium on Lattice Field Theory

T2 - 32nd International Symposium on Lattice Field Theory, LATTICE 2014

Y2 - 23 June 2014 through 28 June 2014

ER -