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arXiv 1102.1106hep-ph
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对违反宇称的DIS的目标质量修正

Target mass corrections to parity-violating DIS

Timothy Hobbs

摘要:

我们研究了几个参数化的影响,所谓的目标质量修正(TMC)的宇称违反深度非弹性散射(DIS)的物理,特别是在高值的动量分数x。我们考虑了α_S的微扰修正在TMCs修饰中所起的作用;我们在单个电弱结构函数(SF)和宇称破坏DIS的可观测量两个层次上明确地计算了这些修正。TMC增加了先前研究的修正清单,这些修正在低Q^2时变得相当大(有限Q ^2修正),我们特别注意可能导致违反近似等式R^{gamma Z} = R^{gamma}的影响。

英文摘要:

We examine the implications of several parameterizations of so-called target mass corrections (TMCs) for the physics of parity-violating deeply inelastic scattering (DIS), especially at high values of the momentum fraction x. We consider the role played by perturbative corrections in alpha_S in modifying TMCs; we explicitly calculate these corrections at both the level of the individual electroweak structure function (SF), as well as in the observables of parity-violating DIS. TMCs augment an inventory of previously studied corrections that become sizable at low Q^2 (finite-Q^2 corrections), and we give special attention to the effects that might lead to the violation of the approximate equality R^{gamma Z} = R^{gamma}.

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