Bing-Ran He, Masayasu Harada
We develope the holographic mean field theory approach in a bottom-up holographic QCD model including baryons and scalar mesons in addition to vector mesons and pions. We study the effect of parity doubling structure of baryons at non-zero density to the equation of state between the chemical potential and the baryon number density. We first show that we can adjust the amount of nucleon mass coming from the chiral symmetry breaking by changing the boundary value of the five-dimensional baryon fields. Then, introducing the mean field for the baryon fields, we shows that, larger the percentage of the mass coming from the spontaneous $\chi$SB is, more rapidly the chemical potential decreases with increasing baryon number density. We also discuss the interpretation of the result in terms of the Walecka-type model.
View original:
http://arxiv.org/abs/1304.7866
No comments:
Post a Comment