Parity doubling of nucléons, Delta and Omega baryons across the deconfinement phase transition
Parity doubling of nucléons, Delta and Omega baryons across the deconfinement phase transition
复制标题
核子、Delta 和 Omega 重子在解禁闭相变过程中宇称倍增
DOI:
10.1051/epjconf/201713707004
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发表时间:
2017
影响因子:
--
通讯作者:
Aarts G
中科院分区:
文献类型:
--
作者:
Aarts G
In this work we analyse positive- and negative-parity channels for the nucleón (spin 1/2 octet), Δ and Ω baryons (spin 3/2 decuplet) using lattice QCD. In Nature, at zero temperature, chiral symmetry is spontaneously broken, causing positive- and negative-parity ground states to have different masses. However, chiral symmetry is expected to be restored (for massless quarks) around the crossover temperature, implying that the two opposite parity channels should become degenerate. Here we study what happens in a temperature range which includes both the hadronic and the quark gluon plasma (QGP) phase. By analysing the correlation and spectral functions via exponential fits and the Maximum Entropy Method respectively, we have found parity doubling for the nucleon and Δ baryon channels in the QGP phase. For the Ω baryon we see a clear signal of parity doubling at the crossover temperature, which is however not complete, due to the nonzero strange quark mass. Moreover, in-medium effects in the hadronic phase are evident for all three baryons, in particular for the negative-parity ground states. This might have implications for the hadron resonance gas model. In this work we used the FASTSUM anisotropicNf=2 + 1 ensembles.
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影响因子:
5.4
作者:
Aarts, Gert;Alton, Chris;Shuiierd, Jon-Ivar
通讯作者:
Shuiierd, Jon-Ivar
影响因子:
56.9
作者:
S. Durr;Z. Fodor;J. Frison;C. Hoelbling;C. Hoelbling;C. Hoelbling;R. Hoffmann;S. Katz;S. Krieg;T. Kurth;L. Lellouch;T. Lippert;K. Szabó;G. Vulvert
通讯作者:
S. Durr;Z. Fodor;J. Frison;C. Hoelbling;C. Hoelbling;C. Hoelbling;R. Hoffmann;S. Katz;S. Krieg;T. Kurth;L. Lellouch;T. Lippert;K. Szabó;G. Vulvert
DOI:
10.1007/978-3-642-01850-3_1
发表时间:
2010
期刊:
--
影响因子:
--
作者:
C. Gattringer;C. Lang
通讯作者:
C. Gattringer;C. Lang
影响因子:
5.4
作者:
Christopher L. McClendon
通讯作者:
Christopher L. McClendon
影响因子:
5
作者:
K. Nakamura;K. Hagiwara;K. Hikasa;H. Murayama;M. Tanabashi;T. Watari;C. Amsler;M. Antonelli
通讯作者:
K. Nakamura;K. Hagiwara;K. Hikasa;H. Murayama;M. Tanabashi;T. Watari;C. Amsler;M. Antonelli