Bethe-Salpeter amplitudes of Upsilons

R. Larsen, S. Meinel, S. Mukherjee, P. Petreczky
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引用次数: 5

Abstract

Based on lattice non-relativistic QCD (NRQCD) studies we present results for Bethe-Salpeter amplitudes for $\Upsilon(1S)$, $\Upsilon(2S)$ and $\Upsilon(3S)$ in vacuum as well as in quark-gluon plasma. Our study is based on 2+1 flavor $48^3 \times 12$ lattices generated using the Highly Improved Staggered Quark (HISQ) action and with a pion mass of $161$ MeV. At zero temperature the Bethe-Salpeter amplitudes follow the expectations based on non-relativistic potential models. At non-zero temperatures the interpretation of Bethe-Salpeter amplitudes turns out to be more nuanced, but consistent with our previous lattice QCD study of excited Upsilons in quark-gluon plasma.
基于晶格非相对论QCD (NRQCD)研究,我们给出了真空和夸克-胶子等离子体中$\Upsilon(1S)$、$\Upsilon(2S)$和$\Upsilon(3S)$的Bethe-Salpeter振幅的结果。我们的研究是基于使用高度改进的交错夸克(HISQ)作用产生的2+1味$48^3 × 12$晶格,其介子质量为$161$ MeV。在零温度下,贝特-萨尔皮特振幅遵循基于非相对论势模型的期望。在非零温度下,贝特-萨尔皮特振幅的解释变得更加微妙,但与我们之前对夸克-胶子等离子体中受激厄普西隆的晶格QCD研究一致。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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