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arXiv 1106.0193hep-ph
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在LHC上产生三重重子

Production of Triply Heavy Baryons at LHC

Yu-Qi Chen, Su-Zhi Wu

摘要:

三重重子是一种非常有趣的强子,它提供了关于重重子的强相互作用、强子结构和弱衰变的信息。计算了分别由4362和1454费曼图组成的gg聚变子过程控制的Ω_{ccc}和Ω_{ccc}的强子产生截面。针对复杂过程中费曼图的大量生成,提出了一种树级费曼图的自动生成和计算方法。结果表明,在LHC中,对于10 fb^{-1}积分亮度,可以积累10^4-10^5个三重重子事例.指出了三重重子的特征,重点讨论了衰变模Ω_{ccc} -> Ω_{sss} + 3 π^+和Ω_{ccb} -> Ω_{sss} + 3 π^+ +π^-。我们的结论是,这是相当有希望发现它们在LHC。

英文摘要:

Triply heavy baryons are very interesting hadrons to be explored for they provide particular information about strong interactions, hadron structures, and weak decays of heavy baryons. We calculate the hadronic production cross sections of the Ω_{ccc} and the Ω_{ccb}, which are dominated by the gg fusion subprocesses containing 4362 and 1454 Feynman diagrams, respectively. A method for generating and calculating tree level Feynman diagrams automatically is developed to deal with complicated processes containing so many diagrams. Our results show that 10^4-10^5 events of triply heavy baryons can be accumulated for 10 fb^{-1} integrated luminosity at LHC. Signatures of the triply heavy baryons are pointed out, with emphasis on the decay modes Ω_{ccc} -> Ω_{sss} + 3 π^+ and Ω_{ccb} -> Ω_{sss} + 3 π^+ +π^-. We conclude that it is quite promising to discover them at LHC.

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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