Chemical potential response of pseudoscalar meson masses in the Nambu--Jona-Lasinio model

Details Chemical potential response of pseudoscalar meson masses in the Nambu--Jona-Lasinio model Chemical potential response of pseudoscalar meson masses in the Nambu--Jona-Lasinio model

2001-10-15

arxiv.org/abs/hep-lat/0110089v2

Nucl.Phys.Proc.Suppl. 106 (2002) 474-476

Physics

High Energy Physics

High Energy Physics - Lattice

Lattice2001(hightemp), 3 pages, 2 figs; figs changed

Scientific paper

Using the Nambu--Jona-Lasinio (NJL) model we study chemical potential response of the pion and kaon masses as a function of temperature and chemical potential, i.e., dm/d\mu (T, \mu). First, we obtain the responses assuming the vector-axial vector coupling is zero (g_V=0). Then, we include a non-zero g_V and study the effects of g_V on the responses. We find that the behavior of dm/d\mu for the pion is quite different from that for the kaon. It means that dm/d\mu is much dependent on the mass difference between the two quarks, i.e., the u and s quarks (or even between the u and d quarks). Our results may give a clue to future studies of dm/d\mu on the lattice.

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