6 research outputs found
Properties of kaon at non-zero temperature and baryon chemical potential
We investigate the spectroscopic properties of the strange particle kaon in
the framework of hot and dense QCD. To this end, first, we find the
perturbative spectral density, which is connected with both the temperature
and the baryon chemical potential . We include the non-perturbative
operators as functions of temperature and baryon chemical potential up to mass
dimension five. We perform the calculations in momentum space and use the quark
propagator in the hot and dense medium. The numerical results at non-zero
temperature and baryon chemical potential demonstrate that the mass of the
particle rises considerably by increasing the baryon chemical potential at a
fixed temperature (for both the zero and non-zero temperatures) up to
approximately GeV. After this point, it starts to fall by
increasing the baryon chemical potential and it vanishes at
GeV for finite temperatures: The vanishing point moves to
lower baryon chemical potentials by increasing the temperature. At zero
temperature, the mass reaches to roughly a fixed value at higher baryon
chemical potentials. On the other hand, the decay constant decreases
considerably with respect to baryon chemical potential up to roughly
GeV, but after this point, it starts to increase in terms of the
baryon chemical potential at finite temperatures. At , the decay constant
reaches to a fixed value at higher chemical potentials, as well. It is also
seen that the obtained results for the mass and decay constant at
are in good consistency with the existing experimental data. The observations
are consistent with the QCD phase diagram in the plane.Comment: 12 Pages, 8 Figures and 3 Table