Multi-lambda matter in a chiral hadronic model

Calculation of Quark Condensate in Nuclear Matter with the Chiral Symmetry Spontaneous Breaking Lagrangian

“…Meanwhile, the theoretical result is insensitive to the value of λ even when the nuclear matter density is quite high. In summary we have investigated the quark condensate qq in nuclear matter in terms of the chiral symmetry spontaneous breaking Lagrangian and mean-field approximation without any other hypothesis, such as those exploited in Refs [16], [17] and [25]. A monotonous decrease of the in-medium quark condensate with the increasing of nuclear matter density is obtained.…”

“…[15] Most recent investigation shows that with the Brown-Rho scaling [16] being included, this contradiction can be eliminated. [17] Alternatively, we will investigate the quark condensate in nuclear matter from chiral symmetry spontaneous breaking Lagrangian and with mean-field approximation [18−20] in this paper.…”