arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1406.3608hep-ph
收藏

热2+1味磁化夸克物质中的奇异夸克手征相变

Strange quark chiral phase transition in hot 2+1-flavor magnetized quark matter

Márcio Ferreira, Pedro Costa, Constança Providência

摘要:

利用Polyakov-Nambu-Jona-Lasinio模型研究了零化学势下热磁化三味夸克物质的奇异夸克手征相变及其电流质量的影响.研究了“t Hooft”混合项对轻扇区和奇异扇区手征对称性恢复的影响,分析了手征奇异跃迁的临界温度与磁场强度的关系。结果表明,s夸克对磁场的敏感性远低于轻夸克。由于t Hooft项的存在,它对所有温度下的轻夸克都有很强的影响,对于小磁场,对于接近零磁场转变温度的温度,以及对于强磁场以上的温度。特别是,s夸克的大质量使得光扇区的手征跃迁更平滑,并向更高的温度移动。当磁场增加时,标量耦合减弱,这也会在s夸克中产生逆磁催化作用,并使交叉对物理量(如声速或比热)的影响变得平滑。

英文摘要:

Using the Polyakov--Nambu--Jona-Lasinio model the strange quark chiral phase transition and the effect of its current mass on a hot magnetized three flavor quark matter at zero chemical potential is investigated. The impact of the 't Hooft mixing term on the restoration of the chiral symmetry on the light and strange sectors is studied and the critical temperature dependence on the magnetic field strength of the chiral strange transition is analyzed. It is shown that the s quark is much less sensitive to the magnetic field than the light quarks. Due to the 't Hooft term, it has a strong influence on the light quarks at all temperatures for small magnetic fields and for temperatures close to the transition temperature at zero magnetic field and above for strong magnetic fields. In particular, the large mass of the s quark makes the chiral transition of the light sector smoother and shifted to larger temperatures. A scalar coupling that weakens when the magnetic field increases will originate an inverse magnetic catalysis also in the s quark and smoothen the signature of the crossover on thermodynamical quantities such as the sound velocities or the specific heat.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑