This paper is dedicated to the experimental study of \(\Xi _{b}^{ - }\) baryons reconstruction using the data collected by the CMS experiment at the LHC in 2016–2018 in proton–proton collisions with center-of-mass energy \(\sqrt s = 13\) TeV, corresponding to an integrated luminosity of 140 fb^–1. The obtained signal yield of \(\Xi _{b}^{ - } \to J{\text{/}}\psi {{\Xi }^{ - }}\) decay mode is more than 900 events, where \(J{\text{/}}\psi \to {{\mu }^{ + }}{{\mu }^{ - }}\), \({{\Xi }^{ - }} \to \Lambda {{\pi }^{ - }}\), \(\Lambda \to p{{\pi }^{ - }}\). The measured mass of the \(\Xi _{b}^{ - }\) baryon is in a good agreement with the world-average mass, and the results present the promising opportunity of beauty hadrons spectroscopy studies with the CMS detector.

本文致力于利用2016-2018年大型强子对撞机质子与质子中心碰撞中CMS实验收集的数据对\（\ Xi _ {b} ^ {-} \）重子重建的实验研究。质量能\（\ sqrt s = 13 \） TeV，对应于140 fb ^–1的综合光度。的所获得的信号产率\（\僖_ {B} ^ { - } \至J {\文本{/}} \ PSI {{\僖} ^ { - }} \）衰减模式是超过900点的事件，其中\（J {\ text {/}} \ psi \ to {{\ mu} ^ {+}} {{\ mu} ^ {-}} \）， \（{{\ Xi} ^ {-}} \到\ Lambda {{\ pi} ^ {-}} \），\（\ Lambda \ to p {{\ pi} ^ {-}} \）。\（\ Xi _ {b} ^ {-} \）的测量质量 重子与世界平均质量高度吻合，结果为使用CMS检测器的美容强子光谱学研究提供了广阔的前景。