Polaron density matrix and effective mass at finite temperature

1999 ◽  
Vol 60 (10) ◽  
pp. 7245-7251 ◽  
Author(s):  
Ashok Sethia ◽  
Fumio Hirata ◽  
Yoshitaka Tanimura ◽  
Yashwant Singh
Keyword(s):  
Density Matrix ◽  
Effective Mass ◽  
Finite Temperature

Studies on proper time regularization and the QCD chiral phase transition

2019 ◽  
Vol 34 (01) ◽  
pp. 1950003
Author(s):  
Yu-Qiang Cui ◽  
Zhong-Liang Pan
Keyword(s):  
Phase Transition ◽  
Small Parameter ◽  
Effective Mass ◽  
Finite Temperature ◽  
Chemical Potential ◽  
Proper Time ◽  
Chiral Phase ◽  
Chiral Phase Transition ◽  
Njl Model ◽  
The Difference

We investigate the finite-temperature and zero quark chemical potential QCD chiral phase transition of strongly interacting matter within the two-flavor Nambu–Jona-Lasinio (NJL) model as well as the proper time regularization. We use two different regularization processes, as discussed in Refs. 36 and 37, separately, to discuss how the effective mass M varies with the temperature T. Based on the calculation, we find that the M of both regularization schemes decreases when T increases. However, for three different parameter sets, quite different behaviors will show up. The results obtained by the method in Ref. 36 are very close to each other, but those in Ref. 37 are getting farther and farther from each other. This means that although the method in Ref. 37 seems physically more reasonable, it loses the advantage in Ref. 36 of a small parameter dependence. In addition, we also, find that two regularization schemes provide similar results when T [Formula: see text] 100 MeV, while when T is larger than 100 MeV, the difference becomes obvious: the M calculated by the method in Ref. 36 decreases more rapidly than that in Ref. 37.

Effective mass of omega meson andNNω interaction at finite temperature and density

1994 ◽  
Vol 49 (1) ◽  
pp. 40-45 ◽  
Author(s):  
Song Gao ◽  
Ru-Keng Su ◽  
Peter K. N. Yu
Keyword(s):  
Effective Mass ◽  
Finite Temperature ◽  
Omega Meson

Effective mass of the surface polaron at a finite temperature

1994 ◽  
Vol 6 (40) ◽  
pp. 8167-8180 ◽  
Author(s):  
Bao-Quan Sun ◽  
Wei Xiao ◽  
Jing-Lin Xiao
Keyword(s):  
Effective Mass ◽  
Finite Temperature
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