Speaker
Mr
DANIEL ROBAINA
(Institute of Nuclear Physics. Johannes Gutenberg University Mainz)
Description
We investigate the low-temperature phase of QCD and the crossover region with two light flavors of quarks. The chiral expansion around the point $(T, m_q = 0)$ 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 $(T = 0, m_q = 0)$ 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 $\leq \overline{m}^{\overline{\text{MS}} \leq$ 15MeV.
Primary author
Mr
DANIEL ROBAINA
(Institute of Nuclear Physics. Johannes Gutenberg University Mainz)
Co-authors
Dr
ANTHONY FRANCIS
(Johannes Gutenberg University)
Dr
BASTIAN B. BRANDT
(University Regensburg)
Prof.
HARVEY B. MEYER
(Institute of Nuclear Physics. Johannes Gutenberg University)
