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NLO radiative corrections for forward-backward and left-right asymmetries at a B-factory

机译:NLO在B工厂的前后和左右不对称的辐射矫正

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This paper presents the first calculations of the parity-violating polarization asymmetry and forward-backward asymmetry of the e + e ? → μ + μ ? ( γ ) process at a center-of-mass energy of 10.579?GeV with up to one-loop electroweak radiative corrections. The calculations are relevant for future precision electroweak measurements at the Belle II experiment, which is now collecting data at the SuperKEKB e + e ? collider with a center-of-mass energy at the mass of the ? ( 4 S ) resonance. In this paper we take under full control the bremsstrahlung process at the conditions of Belle II/SuperKEKB, and the possibilities for a soft photon approach are discussed. The scale of the obtained relative corrections to the parity-violating and forward-backward asymmetries is significant and the scattering angle dependencies of the asymmetries is nontrivial. As an additional validation cross-check using an independent formulation, the calculated asymmetries are compared to results from the K K Monte?Carlo generator.
机译:本文介绍了E + E的奇偶校正偏振不对称和前后不对称的第一计算? →μ+μ? (γ)在10.579的质量能量下的过程中的过程,GEV具有直到单环Electroweak辐射校正。计算与Belle II实验的未来精密电陶器测量相关,现在正在超克克布e + e收集数据?撞机与群众的质量核心的能量? (4 s)共振。在本文中,我们在完全控制Belle II /超应答条件下进行了Bremsstrahlung工艺,并讨论了软光子方法的可能性。截然违反和前后向后的不对称的所获得的相对校正的比例是显着的,并且不对称的散射角度依赖性是非棘手的。作为使用独立配方的额外验证交叉检查,将计算的非对称与来自K k蒙特的结果进行比较。

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