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CP Violation and the CKM Matrix: Assessing the Impact of the Asymmetric B Factories

机译:Cp违规和CKm矩阵:评估不对称的影响   B工厂

摘要

We update the profile of the CKM matrix. The apex (rhobar,etabar) of theUnitarity Triangle is given by means of a global fit. We propose to includetherein sin2alpha from the CP-violating asymmetries in B0->rho+rho-, usingisospin to discriminate the penguin contribution. The constraint fromepsilon'/epsilon is briefly discussed. We study the impact from the measurementof the rare decay K+->pi+nunu-bar, and from a future observation ofKL->pi0nunubar. The B system is investigated in detail, beginning with2beta+gamma and gamma from B0->D(*)+-pi-+ and B+->D(*)0K+. A significant partof this paper is dedicated to B decays into pipi, Kpi, rhopi and rhorho.Various phenomenological and theoretical approaches are studied. Within QCDFactorization we find a remarkable agreement of the pipi and Kpi data with theother UT constraints. A fit of QCD FA to all pipi and Kpi data leads to precisepredictions of the related observables. We analyze separately the B->Kpidecays, and in particular the impact of electroweak penguins in response torecent phenomenological discussions. We find no significant constraint onelectroweak nor hadronic parameters. We do not observe any unambiguous sign ofNew Physics, whereas there is some evidence for potentially large rescatteringeffects. Finally we use a model-independent description of a large class of NewPhysics effects in both BBbar mixing and B decays, namely in the b->d and b->sgluonic penguin amplitudes, to perform a new numerical analysis. Significantnon-standard corrections cannot be excluded yet, however standard solutions arefavored in most cases.
机译:我们更新CKM矩阵的配置文件。整体性三角形给出了单位三角形的顶点(rhobar,etabar)。我们提议在B0-> rho + rho-中,从违反CP的不对称性中包括其中的sin2alpha,使用异旋体来区分企鹅的贡献。简要讨论了ε/ε的约束。我们从稀有衰变K +-> pi + nunu-bar的测量以及对KL-> pi0nunubar的未来观察中研究了影响。从2beta +γ和B0-> D(*)+-pi- +和B +-> D(*)0K +开始的伽玛开始详细研究B系统。本文的重要部分致力于将B衰减为pipi,Kpi,rhopi和rhorho。研究了各种现象学和理论方法。在QCDFactorization中,我们发现pipi和Kpi数据与其他UT约束有着显着的一致性。 QCD FA对所有pipi和Kpi数据的拟合将导致对相关可观测值的精确预测。我们分别分析B-> Kpidecays,尤其是对弱电企鹅的影响,以回应最近的现象学讨论。我们发现对电弱或强子参数没有明显的限制。我们没有观察到任何明确的“新物理学”迹象,但是有一些证据表明可能存在较大的散射效应。最后,我们使用BBbar混合和B衰减(即b-> d和b-> sgluonic企鹅振幅)中一大类NewPhysics效应的模型独立描述来执行新的数值分析。尚不能排除重大的非标准校正,但是在大多数情况下,标准解决方案是有利的。

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