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arXiv 2606.21995hep-phhep-ex
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在 $e^{+}e^{-}$ 对撞机上通过 ${\ell}^{-}$ $+$ $p$ ${\to}$ $Λ$ $+$ $ν_{\ell}$ 过程产生单个 $Λ$ 超子的可行性

The feasibility of single $Λ$ production via ${\ell}^{-}$ $+$ $p$ ${\to}$ $Λ$ $+$ $ν_{\ell}$ at $e^{+}e^{-}$ colliders

School of Physics, Henan Normal University(河南师范大学物理学院);Institute of High Energy Physics, Chinese Academy of Sciences(中国科学院高能物理研究所);University of Chinese Academy of Sciences(中国科学院大学);Center for High Energy Physics, Henan Academy of Sciences(河南省科学院高能物理中心)

Yueling Yang, Peisheng Tian, Shuangshi Fang, Bingbing Yang, Junfeng Sun

AI总结:

研究在 $e^{+}e^{-}$ 对撞机环境中通过轻子-核子深度非弹性散射产生单个 $\Lambda$ 超子的可行性,计算了微分和总截面,发现截面随质心能量增加且对形状因子敏感,指出实验挑战并强调改进重子形状因子测定的必要性。

摘要:

我们全面研究了在电子-正电子对撞机实验环境中,通过轻子-核子深度非弹性散射(LNDIS)过程 ${\ell}^{-} + p \to {\nu}_{\ell} + \Lambda$ 产生单个 $\Lambda$ 超子。我们的方法利用来自 $e^{+}e^{-}$ 碰撞产生的共振态(${J/\psi}$、${\psi}(2S)$、${\Upsilon}(1S)$、${\Upsilon}(2S)$ 和 $Z^{0}$)衰变的入射轻子,这些轻子随后与周围探测器材料中的静止质子发生散射。微分和总截面使用重子跃迁形状因子计算,这些形状因子在量子色动力学(QCD)求和规则和格点 QCD 框架内通过 $z$ 展开方案参数化。我们的结果表明,截面随质心能量增加,并且对形状因子的选择高度敏感,导致显著的理论不确定性。这项研究突显了在 $e^{+}e^{-}$ 对撞机上观测 LNDIS 过程的实验挑战,并强调了改进重子形状因子测定的必要性。它作为未来实验搜索的宝贵参考,并表明在 $e^{+}e^{-}$ 对撞机上异常观测到单个 $\Lambda$ 超子产生可能指示新物理。

英文摘要:

We present a comprehensive investigation of single $Λ$ hyperon production via the lepton-nucleon deep inelastic scattering (LNDIS) process, ${\ell}^{-}$ $+$ $p$ ${\to}$ $ν_{\ell}$ $+$ $Λ$, in the experimental environment of electron-positron colliders. Our approach utilizes incident leptons originating from the decays of resonances (${J/ψ}$, $ψ(2S)$, $Υ(1S)$, $Υ(2S)$, and $Z^{0}$) produced in $e^{+}e^{-}$ collisions, which then scatter off stationary protons in the surrounding detector materials. The differential and total cross sections are calculated using baryonic transition form factors parameterized with the $z$-expansion scheme within both the quantum chromodynamics (QCD) sum rule and lattice QCD frameworks. Our results indicate that the cross section increases with center-of-mass energy and is highly sensitive to the choice of form factors, resulting in significant theoretical uncertainties. This study highlights the experimental challenges in observing the LNDIS process at $e^{+}e^{-}$ colliders and underscores the need for improved determination of baryonic form factors. It serves as a valuable reference for future experimental searches and suggests that an anomalous observation of single $Λ$ hyperon production at $e^{+}e^{-}$ colliders could indicate new physics.

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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