Chemical potential dependence of {pi} and {rho} properties
- Physics Division, Building 203, Argonne National Laboratory, Argonne, Illinois 60439-4843 (United States); Fachbereich Physik, Universitaet Rostock, D-18051 Rostock (Germany)
Using a confining, Dyson-Schwinger equation model of QCD at finite temperature (T) and chemical potential ({mu}), we study the behavior of {l_angle}{bar q}q{r_angle}, m{sub {pi}}, f{sub {pi}} and the masses of the {rho}- and {phi}-mesons. For each of these quantities there is a necessary anticorrelation between its response to T and its response to {mu}. ({minus}{l_angle}{bar q}q{r_angle}) and f{sub {pi}} decrease with T and increase with {mu}; m{sub {pi}} is almost insensitive to T and {mu} until very near the border of the confinement domain; the mass of the longitudinal component of the vector mesons increases with T and decreases with {mu}. At T=0, the {rho}-meson mass is reduced by approximately 15{percent} at nuclear matter density. These results are a consequence of the necessary momentum-dependence of the dressed-quark self-energy. {copyright} {ital 1998} {ital The American Physical Society}
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 678739
- Journal Information:
- Physical Review, C, Journal Name: Physical Review, C Journal Issue: 6 Vol. 57; ISSN PRVCAN; ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
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