String breaking by light and strange quarks in QCD

String breaking by light and strange quarks in QCD
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QCD 中的光和奇异夸克导致弦断裂

DOI:
10.1016/j.physletb.2019.05.018
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发表时间:
2019
期刊:
影响因子:
4.4
通讯作者:
Peardon, Mike
Peardon, Mike
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Bulava, John;Hörz, Ben;Knechtli, Francesco;Koch, Vanessa;Moir, Graham;Morningstar, Colin;Peardon, Mike

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使用 N f= 2+ 1 动态风味的晶格 QCD 计算包含静态夸克反夸克对的系统的能谱,用于广泛的源分离。通过采用变分方法,其基础包括类似于胶子弦和两个分离的静态介子系统的算子,前三个能级被确定为达到或超过有利于真空通过光或奇夸克对产生来筛选静态源的距离,从而使这两种筛选现象都能被观察到。能谱的分离依赖性通过一个简单的模型在该饱和区域上可靠地参数化,该模型可以用作后续研究夸克尼亚高于阈值以及重-轻和重-奇异耦合通道介子散射的输入。
The energy spectrum of a system containing a static quark anti-quark pair is computed for a wide range of source separations using lattice QCD with N f= 2+ 1 dynamical flavours. By employing a variational method with a basis including operators resembling both the gluon string and systems of two separated static mesons, the first three energy levels are determined up to and beyond the distance where it is energetically favourable for the vacuum to screen the static sources through light-or strange-quark pair creation, enabling both these screening phenomena to be observed. The separation dependence of the energy spectrum is reliably parameterised over this saturation region with a simple model which can be used as input for subsequent investigations of quarkonia above threshold and heavy-light and heavy-strange coupled-channel meson scattering.
使用随机 LapH 方法用 2 1 动态费米子进行弦断裂
DOI: 10.22323/1.334.0053
发表时间: 2018
期刊: Proceedings of The 36th Annual International Symposium on Lattice Field Theory — PoS(LATTICE2018)
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