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arXiv 1201.4852hep-phhep-latnucl-th
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次领先阶强子宇称破坏

Hadronic Parity Violation at Next-to-Leading Order

B. C. Tiburzi

摘要:

味守恒的非轻子弱相互作用可以通过在核系统和少体系统中观测宇称破缺来进行实验研究。在强子尺度下,宇称破缺的四夸克算符的矩阵元最终导致强子间的宇称破缺耦合,这种矩阵元可以用格点量子色动力学非微扰地计算.本文利用重整化群研究了等矢宇称破缺算符从弱标度到强子标度的运动。我们在QCD耦合中采用次领先阶,同时考虑了中性流和荷电流相互作用。在这个顺序下,结果是重整化方案相关的,我们利用t Hooft-Veltman维正则化。比较了Wilson系数在首阶和次首阶的演化规律。下一个领导秩序的影响是不可忽略的强子尺度。

英文摘要:

The flavor-conserving non-leptonic weak interaction can be studied experimentally through the observation of parity violation in nuclear and few-body systems. At hadronic scales, matrix elements of parity-violating four-quark operators ultimately give rise to the parity violating couplings between hadrons, and such matrix elements can be calculated non-perturbatively using lattice QCD. In this work, we investigate the running of isovector parity-violating operators from the weak scale down to hadronic scales using the renormalization group. We work at next-to-leading order in the QCD coupling, and include both neutral-current and charged-current interactions. At this order, results are renormalization scheme dependent, and we utilize 't Hooft-Veltman dimensional regularization. The evolution of Wilson coefficients at leading and next-to-leading order is compared. Next-to-leading order effects are shown to be non-negligible at hadronic scales.

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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