论文标题
QED的相互作用对晶格QCD+QED的重中膜质量的影响
QED interaction effects on heavy meson masses from lattice QCD+QED
论文作者
论文摘要
强子肿块受到QED相互作用引起的很少的MEV校正，几乎完全是由于价夸克的电荷引起的。 QED效应包括自我能量贡献和价夸克/反夸克之间的相互作用。通过将价值夸克电荷的不同符号结合在一起，我们能够隔离以库仑为主导的交互项，$ \langleα_{\ mathrm {qed}} e_ {q_1} e_ {q_1} e _ {\ edline {q overline {q} _2} _2} __2} _ _2}/r \ rangle $，我们以$ d_s $，$η_c$和$ j/ψ$介子的方式研究此信息，在lattice QCD和QUCHENDED QED中工作。我们使用在晶格间距的多个值中包括上，向下，奇怪和魅力夸克的Gluon场配置。我们的结果，包括比魅力重的夸克的介子的值，可用于改善QED贡献的现象学模型。 QED相互作用项包含有关介子结构的信息；我们得出有效尺寸$ \ langle 1/r _ {\ mathrm {eff}} \ rangle^{ - 1} $对于$η_c$，$ j/ψ$和$ d_s $ of 0.206（8）（8）fm，0.321（14）（14）FM和0.307（31）FM。
Hadron masses are subject to few MeV corrections arising from QED interactions, almost entirely arising from the electric charge of the valence quarks. The QED effects include both self-energy contributions and interactions between the valence quarks/anti-quarks. By combining results from different signs of the valence quark electric charge we are able to isolate the interaction term which is dominated by the Coulomb piece, $\langle α_{\mathrm{QED}}e_{q_1}e_{\overline{q}_2}/r \rangle$, in the nonrelativistic limit. We study this for $D_s$, $η_c$ and $J/ψ$ mesons, working in lattice QCD plus quenched QED. We use gluon field configurations that include up, down, strange and charm quarks in the sea at multiple values of the lattice spacing. Our results, including also values for mesons with quarks heavier than charm, can be used to improve phenomenological models for the QED contributions. The QED interaction term carries information about meson structure; we derive effective sizes $\langle 1/r_{\mathrm{eff}} \rangle^{-1}$ for $η_c$, $J/ψ$ and $D_s$ of 0.206(8) fm, 0.321(14) fm and 0.307(31) fm respectively.
