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arXiv 0910.4947hep-ph
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重子的兴衰

The Rise and Fall of Baryons

Shu Lin, Edward Shuryak

摘要:

我们讨论了重子在QCD相变附近对QCD热力学的贡献,我们将其分为“弦激发”和“手征”最低态。我们的有限- $T$弦模型的前一个组成部分的灵感来自于静态势的晶格数据和字符串生存甚至$above$ $T_c$的想法:它被用来解释由Bielefeld-BNL群在晶格上计算的两组重子可导性。该模型的两个新成分是(i)弦的近$T_c$收紧,以及(ii)弦长度的物理上限。然后,我们继续进行更微妙的影响有关的手征恢复动力学附近的$T_c$:我们认为,“熔化”的最低核子/ $Δ$质量的西格玛条款可以解释这些兼容性。在讨论中,我们认为束缚夸克态,作为一个可能的解释,在$T=(1-1.4)T_c$的一些赤字的贡献。

英文摘要:

We discuss the baryonic contribution to QCD thermodynamics near the QCD phase transition, which we split into "stringy excitations" and the "chiral" lowest states. Our finite-$T$ string model for the former component is inspired by the lattice data on static potentials and ideas of string survival even $above$ $T_c$: it is used to explain two sets of baryonic susceptibilities calculated on the lattice by the Bielefeld-BNL group. Two new ingredients of the model are (i) the near-$T_c$ tightening of the strings, and (ii) physical upper limit of the string length. Then we proceed to more subtle effects related to chiral restoration dynamics near $T_c$: we suggest that "melting" of the sigma terms of the lowest nucleon/$Δ$ masses can explain these susceptibilities. In a discussion, we consider bound monopole-quark states, as a possible explanation to some deficits of contribution at $T=(1-1.4)T_c$.

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。

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