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arXiv 2102.03175hep-ex
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LHCb的b强子研究

Studies of b-hadrons at LHCb

Viacheslav Matiunin

摘要:

在大型强子对撞机1991年和1992年期间在质子-质子碰撞中的LHCb实验中收集的大量数据集为研究重美强子态和拓宽其光谱学和生产知识提供了独特的可能性。综述了近年来在寻找新的$\mathrm{b}$ -强子激发态和$\mathrm{b}$ -强子产生方面的研究成果。特别是,观测到了新的激发态$Ω^-_{\mathrm{b}}$,观测到了两个新的窄$Λ_{\mathrm{b}}(6146)^0$和$Λ_{\mathrm{b}}(6152)^0$态,观测到了与$Λ_{\mathrm{b}}(2\mathrm{S})^0$预言相一致的新的$Λ_{\mathrm{b}}^{**0}$态,精确测量了$Λ_{\mathrm{b}}(5912)^0$和$Λ_{\mathrm{b}}(5920)^0$态的质量和宽度,测量了在7和13 TeV质子-质子碰撞中$\mathrm{B}_{\mathrm{c}}^-$介子产生分数和$\mathrm{B}_{\mathrm{c}}^--\mathrm{B}_{\mathrm{c}}^+$产生不对称性.

英文摘要:

A large data set collected at the LHCb experiment in proton-proton collisions during Runs 1 and 2 of the Large Hadron Collider has opened a unique possibility to study heavy beauty hadron states and to broaden knowledge of their spectroscopy and production. Recent results on searches for new excited $\mathrm{b}$-hadron states, and studies of $\mathrm{b}$-hadron production, are reviewed. In particular, the observation of new excited $Ω^-_{\mathrm{b}}$ states, the observation of two new narrow $Λ_{\mathrm{b}}(6146)^0$ and $Λ_{\mathrm{b}}(6152)^0$ states, the observation of new $Λ_{\mathrm{b}}^{**0}$ state consistent with the $Λ_{\mathrm{b}}(2\mathrm{S})^0$ prediction, a precise measurement of the mass and width of $Λ_{\mathrm{b}}(5912)^0$ and $Λ_{\mathrm{b}}(5920)^0$ states, and a measurement of the $\mathrm{B}_{\mathrm{c}}^-$ meson production fraction and $\mathrm{B}_{\mathrm{c}}^--\mathrm{B}_{\mathrm{c}}^+$ production asymmetry in 7 and 13 TeV of proton-proton collisions are presented.

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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