Fate of the η′ in the quark gluon plasma
Fate of the η′ in the quark gluon plasma
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DOI：
10.1016/j.physletb.2019.05.035
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发表时间：
2019-03
影响因子：
4.4
通讯作者：
A. Kotov;M. Lombardo;A. Trunin
中科院分区：
文献类型：
--
作者：
A. Kotov;M. Lombardo;A. Trunin
本文研究了有限温度下Nf = 2+ 1+ 1格点QCD模拟中的η′。结果得到的胶子定义的拓扑电荷密度相关梯度流后的分析。我们的结果表明，在伪临界温度以上的η′质量的增长，与手征对称性恢复。在拟临界温度附近，结果与η′质量的小下降一致。下降的幅度与实验分析得到的η′质量的减少是一致的，并表明η′质量接近于零温度的非反常贡献。
In this paper we study the η′ in N f= 2+ 1+ 1 lattice QCD simulations at finite temperature. Results are obtained from the analysis of the gluonic defined topological charge density correlator after gradient flow. Our results indicate the growth of the η′ mass above the pseudocritical temperature, associated with the chiral symmetry restoration. In the vicinity of the pseudocritical temperature the results are consistent with a small dip in the η′ mass. The magnitude of the dip is compatible with the reduction of the η′ mass obtained by experimental analysis and suggests that η′ mass comes close to zero temperature non-anomalous contribution.