Fluctuations and correlations of net baryon number, electric charge and strangeness in a background magnetic field

doi:10.1140/epja/s10050-021-00519-3

	Fluctuations and correlations of net baryon number, electric charge and strangeness in a background magnetic field
	Ding, H-T 1,3; Li, S-T 1,2,3; Shi, Q.1,3; Wang, X-D 1,3
刊名	EUROPEAN PHYSICAL JOURNAL A
	2021-06-01
卷号	57 期号:6 页码:13
ISSN号	1434-6001
DOI	10.1140/epja/s10050-021-00519-3
通讯作者	Ding, H-T(hengtong.ding@mail.ccnu.edu.cn)
英文摘要	We present results on the second-order fluctuations of and correlations among net baryon number, electric charge and strangeness in (2 + 1)-flavor lattice QCD in the presence of a background magnetic field. Simulations are performed using the tree-level improved gauge action and the highly improved staggered quark (HISQ) action with a fixed scale approach (a similar or equal to 0.117 fm). The light quark mass is set to be 1/10 of the physical strange quark mass and the corresponding pion mass is about 220 MeV at vanishing magnetic field. Simulations are performed on 32(3) x N-tau lattices with 9 values of N-tau varying from 96 to 6 corresponding to temperatures ranging from zero up to 281 MeV. The magnetic field strength eB is simulated with 15 different values up to similar to 2.5 GeV2 at each nonzero temperature. We find that quadratic fluctuations and correlations do not show any singular behavior at zero temperature in the current window of eB while they develop peaked structures at nonzero temperatures as eB grows. By comparing the electric charge-related fluctuations and correlations with hadron resonance gas model calculations and ideal gas limits we find that the changes in degrees of freedom start at lower temperatures in stronger magnetic fields. Significant effects induced by magnetic fields on the isospin symmetry and ratios of net baryon number and baryon-strangeness correlation to strangeness fluctuation are observed, which could be useful for probing the existence of a magnetic field in heavy-ion collision experiments.
资助项目	NSFC[11535012] ; NSFC[11775096] ; NSFC[11947237] ; NSFC[NSC^3]
WOS关键词	COLLISIONS ; PARTICLE
WOS研究方向	Physics
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000691297100001
资助机构	NSFC
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/136405]
专题	中国科学院近代物理研究所
通讯作者	Ding, H-T
作者单位	1.Cent China Normal Univ, Key Lab Quark & Lepton Phys MOE, Wuhan 430079, Peoples R China 2.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China 3.Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China
推荐引用方式 GB/T 7714	Ding, H-T,Li, S-T,Shi, Q.,et al. Fluctuations and correlations of net baryon number, electric charge and strangeness in a background magnetic field[J]. EUROPEAN PHYSICAL JOURNAL A,2021,57(6):13.
APA	Ding, H-T,Li, S-T,Shi, Q.,&Wang, X-D.(2021).Fluctuations and correlations of net baryon number, electric charge and strangeness in a background magnetic field.EUROPEAN PHYSICAL JOURNAL A,57(6),13.
MLA	Ding, H-T,et al."Fluctuations and correlations of net baryon number, electric charge and strangeness in a background magnetic field".EUROPEAN PHYSICAL JOURNAL A 57.6(2021):13.