Roberge-Weiss endpoint and chiral symmetry restoration in Nf=2+1 QCD
Roberge-Weiss endpoint and chiral symmetry restoration in
Nf=2+1
QCD
复制标题
Nf=2 1 QCD 中的 Roberge-Weiss 终点和手性对称性恢复
DOI：
10.1103/physrevd.99.014502
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发表时间：
2018
影响因子：
5
通讯作者：
R. Tripiccione
中科院分区：
文献类型：
--
作者：
C. Bonati;E. Calore;M. D’Elia;M. Mesiti;F. Negro;F. Sanfilippo;S. Schifano;G. Silvi;R. Tripiccione
我们研究了在接近${N}_{f}=2+1$ QCD的手性极限时，roberto - weiss端点跃迁的命运及其与手性对称性恢复的关系。我们在时间方向上对具有${N}_{t}=4$位点的格采用了粗壮的交错离散化；保持奇光质量比的恒定物理值，探索三种不同的光夸克质量，对应于跃迁周围的伪goldstone介子质量${m}_{\ensuremath{\pi}}\ensuremath{\simeq}100$， 70和50 MeV，接近手性极限。有限尺寸尺度分析提供了证据，证明在所有探索的质量范围内，在三维Ising普适性类中，跃迁仍然是二阶的。交错作用的剩余手性对称性也允许我们研究当手性极限接近时，roberg - weiss端点跃迁和手性恢复跃迁之间的关系：我们的结果，包括手性凝聚物的临界尺度，与手性极限中两个跃迁的重合是一致的；然而，我们无法辨别控制临界行为的对称性，因为对于两种可能的普适类[3D Ising或$O(2)$]，与手性凝聚物尺度相关的临界指标彼此非常接近。
We investigate the fate of the Roberge-Weiss endpoint transition and its connection with the restoration of chiral symmetry as the chiral limit of ${N}_{f}=2+1$ QCD is approached. We adopt a stout staggered discretization on lattices with ${N}_{t}=4$ sites in the temporal direction; the chiral limit is approached maintaining a constant physical value of the strange-to-light mass ratio and exploring three different light quark masses, corresponding to pseudo-Goldstone pion masses ${m}_{\ensuremath{\pi}}\ensuremath{\simeq}100$, 70 and 50 MeV around the transition. A finite size scaling analysis provides evidence that the transition remains second order, in the 3D Ising universality class, in all the explored mass range. The residual chiral symmetry of the staggered action also allows us to investigate the relation between the Roberge-Weiss endpoint transition and the chiral restoration transition as the chiral limit is approached: our results, including the critical scaling of the chiral condensate, are consistent with a coincidence of the two transitions in the chiral limit; however we are not able to discern the symmetry controlling the critical behavior, because the critical indices relevant to the scaling of the chiral condensate are very close to each other for the two possible universality classes [3D Ising or $O(2)$].
全息罗伯格-韦斯跃迁
影响因子：
5.4
作者：
Aarts G
通讯作者：
Aarts G
影响因子：
4.4
作者：
Borsanyi, Szabolcs;Fodor, Zoltan;Szabo, Kalman K.
通讯作者：
Szabo, Kalman K.