Pion properties at finite density

Details Pion properties at finite density Pion properties at finite density

2008-08-28

arxiv.org/abs/0808.3822v1

Mod.Phys.Lett.A24:891-894,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, 2 figures, Talk given at the 4th Asia-Pacific Conference on Few-Body Problems in Physics 2008 (APFB08), 19 ~ 23 Aug 2

Scientific paper

10.1142/S0217732309000243

In this talk, we report our recent work on the pion weak decay constant (F_pi) and pion mass (m_pi) using the nonlocal chiral quark model with the finite quark-number chemical potential (mu) taken into account. Considering the breakdown of Lorentz invariance at finite density, the time and space components are computed separately, and the corresponding results turn out to be: F^t_pi = 82.96 MeV and F^s_pi = 80.29 MeV at mu_c ~ 320 MeV, respectively. Using the in-medium Gell-Mann Oakes-Renner (GOR) relation, we show that the pion mass increases by about 15% at mu_c.

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