Journalartikel

Jahr der Veröffentlichung: 2019

Zeitschrift: The European Physical Journal A

Bandnummer: 55

Heftnummer: 9

ISSN: 1434-6001

eISSN: 1434-601X

DOI Link: https://doi.org/10.1140/epja/i2019-12868-1

Verlag: Springer

Abstract: 
We investigate the properties of light scalar and pseudoscalar mesons at finite (light) quark chemical potential. To this end we solve a coupled set of (truncated) Dyson-Schwinger equations for the quark and gluon propagators in Landau-gauge QCD and extend earlier results for N-f = 2 + 1 dynamical quark flavors to finite chemical potential at zero temperature. We then determine the meson bound state masses, wave functions, and decay constants for chemical potentials below the first-order phase transition from their homogeneous Bethe-Salpeter equation. We study the changes in the quark dressing functions and Bethe-Salpeter wave functions with chemical potential. In particular, we trace charge-conjugation parity breaking. Furthermore, we confirm the validity of the Silver-Blaze property: all dependencies of colored quantities on chemical potential cancel out in observables and we observe constant masses and decay constants up to and into the coexistence region of the first-order chiral phase transition.

Harvard-Zitierstil: Gunkel, P., Fischer, C. and Isserstedt, P. (2019) Quarks and light (pseudo-)scalar mesons at finite chemical potential, The European Physical Journal A, 55(9), Article 169. https://doi.org/10.1140/epja/i2019-12868-1

APA-Zitierstil: Gunkel, P., Fischer, C., & Isserstedt, P. (2019). Quarks and light (pseudo-)scalar mesons at finite chemical potential. The European Physical Journal A. 55(9), Article 169. https://doi.org/10.1140/epja/i2019-12868-1