arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2201.02511hep-ph
收藏

半包容DIS中的极化矢量介子产生

Polarized vector meson production in semi-inclusive DIS

Xue-shuai Jiao, Kai-bao Chen

摘要:

本文对轻子-核子深度非弹性散射$e^-N\to e^-VX$中极化矢量介子的产生进行了系统的计算。我们考虑在高能量下中性电流电弱相互作用引起宇称破坏效应的一般情况。我们提出了一个一般的运动学分析的过程,并表明,截面表示的81个结构函数。我们进一步给出了该过程的部分子模型计算,并给出了在微扰量子色动力学的首阶和首扭下,由横动量相关的部分子分布函数和碎裂函数给出的结构函数的结果。结果表明,在该量级上有27个非零结构函数,其中15个与矢量介子的张量极化有关。十三个结构函数由宇称破坏效应产生。我们也给出了矢量介子自旋排列的结果和一个粗略的数值估计。

英文摘要:

We make a systematic calculation for polarized vector meson production in semi-inclusive lepton-nucleon deep inelastic scattering $e^-N\to e^-VX$. We consider the general case of neutral current electroweak interactions at high energies which give rise to parity-violating effects. We present a general kinematic analysis for the process and show that the cross sections are expressed by 81 structure functions. We further give a parton model calculation for the process and show the results for the structure functions in terms of the transverse momentum dependent parton distribution functions and fragmentation functions at the leading order and leading twist of perturbative quantum chromodynamics. The results show that there are 27 nonzero structure functions at this order, among which 15 are related to the tensor polarization of the vector meson. Thirteen structure functions are generated by parity-violating effects. We also present the result and a rough numerical estimate for the spin alignment of the vector meson.

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。

↑