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arXiv 2301.07010hep-exhep-ph
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$\Lambda^+_\mathrm{c}$ 极化测量:基于主导强子衰变模式

$Λ^+_\mathrm{c}$ polarimetry using the dominant hadronic mode

LHCb collaboration

AI总结:

本文提出自旋-1/2重子多体衰变的极化仪矢量场,基于LHCb振幅分析计算$\Lambda^+_\mathrm{c}\to pK^-\pi^+$的极化分布,以模型无关形式促进极化测量与强子振幅分析。

摘要:

本文引入自旋-1/2重子多体衰变的极化仪矢量场,作为重子不对称参数的推广。利用LHCb实验近期对$\Lambda^+_\mathrm{c} \to p K^- \pi^+$衰变的振幅分析结果,我们在Mandelstam变量空间中计算了该过程运动学依赖的极化仪矢量分布,从而以模型无关形式表达极化衰变率。所得表示有助于$\Lambda^+_\mathrm{c}$重子的极化测量,并便于将$\Lambda^+_\mathrm{c} \to p K^- \pi^+$衰变模式纳入强子振幅分析。

英文摘要:

The polarimeter vector field for multibody decays of a spin-half baryon is introduced as a generalisation of the baryon asymmetry parameters. Using a recent amplitude analysis of the $Λ^+_\mathrm{c} \to p K^- π^+$ decay performed at the LHCb experiment, we compute the distribution of the kinematic-dependent polarimeter vector for this process in the space of Mandelstam variables to express the polarised decay rate in a model-agnostic form. The obtained representation can facilitate polarisation measurements of the $Λ^+_\mathrm{c}$ baryon and eases inclusion of the $Λ^+_\mathrm{c} \to p K^- π^+$ decay mode in hadronic amplitude analyses.

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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