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Isospin effect on baryon and charge fluctuations from the pNJL model
We have studied the possible isospin corrections on the skewness and kurtosis
of net-baryon and net-charge fluctuations in the isospin asymmetric matter
formed in Au+Au collisions at RHIC-BES energies, based on a 3-flavor
polyakov-looped Nambu-Jona-Lasinio model. With typical scalar-isovector and
vector-isovector couplings leading to the splitting of and quark chiral
phase transition boundaries and critical points, we have observed dramatic
isospin effects on the susceptibilities, especially those of net-charge
fluctuations. Reliable experimental measurements at even lower collision
energies are encouraged to confirm the observed isospin effects.Comment: 6 pages, 3 figure
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