期刊
PHYSICAL REVIEW D
卷 88, 期 1, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.88.014009
关键词
-
资金
- National Natural Science Foundation of China [11005138]
Effects of an external magnetic field on the fluctuations of quark number, fluctuations, and correlations of conserved charges, including baryon number, electric charge, and strangeness, are studied in the 2 + 1 flavor Polyakov-Nambu-Jona-Lasinio model. We find that a magnetic field increases fluctuations and correlations in the regime of chiral crossover. It makes the transition of quadratic fluctuations more abrupt, and the peak structure of quartic fluctuations more pronounced. Our calculations indicate that chi(B)(4)/chi(B)(2), chi(Q)(4)/chi(Q)(2), and chi B-11(Q) are very sensitive to the external magnetic field and can possibly be used for probes for the strong magnetic field produced in the early stage of noncentral collisions.
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