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arXiv 1802.04469hep-ph
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弱带电流诱导电子质子散射中的极化可观量和T不变性

Polarization observables and T-noninvariance in the weak charged current induced electron proton scattering

A. Fatima, M. Sajjad Athar, S. K. Singh

摘要:

本文研究了弱带电流引起的电子质子散射中末态强子($n$、$ Λ$和$Σ^0$)的总散射截面($σ$)、微分散射截面($dσ/dQ^2$)以及极化的纵向($P_L(E_e,Q^2)$)、垂直($P_P(E_e,Q^2)$)和横向($P_T(E_e,Q^2)$)分量。我们没有假设T-不变性,这使得垂直于生产面的强子极化的横向分量是非零的。给出了上述所有观测量的数值结果,并讨论了它们对轴向矢量形状因子和弱电形状因子的依赖关系。在假设矢量流守恒和轴向矢量流部分守恒的前提下,本研究确定了奇异度区高$ Q^2$的轴向矢量核子-超子跃迁形状因子,为检验弱强子流的对称性如T不变性和SU(3)对称性提供了实验依据.

英文摘要:

In this work, we have studied the total scattering cross section ($σ$), differential scattering cross section ($dσ/dQ^2$) as well as the longitudinal ($P_L(E_e,Q^2)$), perpendicular ($P_P(E_e,Q^2)$), and transverse ($P_T(E_e,Q^2)$) components of the polarization of the final hadron ($n$, $ Λ$ and $Σ^0$) produced in the electron proton scattering induced by the weak charged current. We have not assumed T-invariance which allows the transverse component of the hadron polarization perpendicular to the production plane to be non-zero. The numerical results are presented for all the above observables and their dependence on the axial vector form factor and the weak electric form factor are discussed. The present study enables the determination of the axial vector nucleon-hyperon transition form factors at high $ Q^2$ in the strangeness sector which can provide test of the symmetries of the weak hadronic currents like T-invariance and SU(3) symmetry while assuming the hypothesis of conserved vector current and partial conservation of axial vector current.

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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