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arXiv 2008.09619hep-phhep-exhep-latnucl-th
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光阵面上重介子和夸克偶素的分布振幅

Distribution Amplitudes of Heavy Mesons and Quarkonia on the Light Front

Fernando E. Serna, Roberto Correa da Silveira, J. J. Cobos-Martínez, Bruno El-Bennich, Eduardo Rojas

摘要:

通过在重夸克区引入不同的变装函数对梯形核的依赖性,修正了Bethe-Salpeter方程的梯形核。与以前的工作相比,这允许同时计算轻赝标介子,$D_u$,$D_s$,$B_u$,$B_s$和$B_c$介子和重夸克介子$η_c$和$η_b$的质量谱和轻子衰变常数在同一框架内的物理介子质量。将相应的Bethe-Salpeter振幅投影到光阵面上,重建了全理论中介子的分布振幅。并与重夸克有效理论中重介子分布振幅的一阶倒数矩作了比较。

英文摘要:

The ladder kernel of the Bethe-Salpeter equation is amended by introducing a different flavor dependence of the dressing functions in the heavy-quark sector. Compared with earlier work this allows for the simultaneous calculation of the mass spectrum and leptonic decay constants of light pseudoscalar mesons, the $D_u$, $D_s$, $B_u$, $B_s$ and $B_c$ mesons and the heavy quarkonia $η_c$ and $η_b$ within the same framework at a physical pion mass. The corresponding Bethe-Salpeter amplitudes are projected onto the light front and we reconstruct the distribution amplitudes of the mesons in the full theory. A comparison with the first inverse moment of the heavy meson distribution amplitude in heavy quark effective theory is made.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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