arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1902.09735hep-ph
收藏

美丽迷人的介子:光谱学的新视野

Mesons with Beauty and Charm: New Horizons in Spectroscopy

Estia J. Eichten, Chris Quigg

摘要:

在重夸克偶素系统中,具有美丽和魅力的$(c\bar{b})$介子的$B_c ^+$族是特别令人感兴趣的。$B_c ^+$介子在质量和大小上都介于$(c\bar{c})$和$(b\bar{b})$态之间,所以$(c\bar{b})$光谱的许多特征可以从我们所知道的粲鎓和底鎓系统中推断出来。夸克质量的不相等意味着动力学可能比简单的插值法更丰富,部分原因是粲夸克在$B_c$中的运动速度比在$J/ψ$中快。对$B_c ^+$谱的仔细研究可以检验我们对重夸克和反夸克之间相互作用的理解,并可能揭示近似在哪里失效。...

英文摘要:

The $B_c ^+$ family of $(c\bar{b})$ mesons with beauty and charm is of special interest among heavy quarkonium systems. The $B_c ^+$ mesons are intermediate between $(c\bar{c})$ and $(b\bar{b})$ states both in mass and size, so many features of the $(c\bar{b})$ spectrum can be inferred from what we know of the charmonium and bottomonium systems. The unequal quark masses mean that the dynamics may be richer than a simple interpolation would imply, in part because the charmed quark moves faster in $B_c$ than in the $J/ψ$. Close examination of the $B_c ^+$ spectrum can test our understanding of the interactions between heavy quarks and antiquarks and may reveal where approximations break down. ...

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。

↑