arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1709.02706nucl-thhep-ph
收藏

陌生感的产生与色彩的解构

Strangeness Production and Color Deconfinement

Paolo Castorina, Salvatore Plumari, Helmut Satz

摘要:

不同高能碰撞中强子产生的相对多重数一般都能用一个所有强子共振的理想气体来描述,只是在一定条件下,奇异粒子的产生率被系统地降低了。我们表明,当用初始熵密度s_0或产生的热介质的初始温度T表示时,在不同碰撞能量下pp,pA和AA碰撞中,抑制因子γ_s(占奇异粒子率的减少)成为一个普适函数.在夸克-强子转变温度Tc = 160 MeV附近的一个很窄的温度范围内,γ_s从0.5增加到1.0。因此,奇异抑制消失的发病颜色deconconfinement,随后,完全平衡共振气体的行为达到。

英文摘要:

The relative multiplicities for hadron production in different high energy collisions are in general well described by an ideal gas of all hadronic resonances, except that under certain conditions, strange particle rates are systematically reduced. We show that the suppression factor gamma_s, accounting for reduced strange particle rates in pp, pA and AA collisions at different collision energies, becomes a universal function when expressed in terms of the initial entropy density s_0 or the initial temperature T of the produced thermal medium. It is found that gamma_s increases from about 0.5 to 1.0 in a narrow temperature range around the quark-hadron transition temperature T_c = 160 MeV. Strangeness suppression thus disappears with the onset of color deconfinement; subsequently, full equilibrium resonance gas behavior is attained.

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。

↑