Journal Article

GSI-2016-00587

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Chiral dynamics in the low-temperature phase of QCD

Brandt, B. B. ; Francis, A.GSI* ; Meyer, H. B.GSI* ; Robaina, D.GSI*

2014
Soc. [S.l.]

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Please use a persistent id in citations: doi:10.1103/PhysRevD.90.054509

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 $(T,m=0)$ in the temperature vs. quark-mass plane indicates that a sharp real-time excitation exists with the quantum numbers of the pion. An exact sum rule is derived for the thermal modification of the spectral function associated with the axial charge density; the (dominant) pion pole contribution obeys the sum rule. We determine the two parameters of the pion dispersion relation using lattice QCD simulations and test the applicability of the chiral expansion. The time-dependent correlators are also analyzed using the Maximum Entropy Method, yielding consistent results. Finally, we test the predictions of the chiral expansion around the point $(T=0,m=0)$ for the temperature dependence of static observables.

Note: 30 pages, 11 figures, 5 tables

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Contributing Institute(s):

1. HI Mainz (HIM)

Research Program(s):

1. 612 - Cosmic Matter in the Laboratory (POF3-612) (POF3-612)

Appears in the scientific report 2014

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Database coverage:
; Current Contents - Physical, Chemical and Earth Sciences ; IF < 5 ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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