Isospin analysis of charmless B-meson decays

被引：19

作者：

Charles, J. ^{[1
]}

Deschamps, O. ^{[2
]}

Descotes-Genon, S. ^{[3
]}

Niess, V. ^{[2
]}

机构：

[1] Univ Toulon & Var, CPT, Aix Marseille Univ, CNRS, F-13288 Marseille 9, France

[2] Univ Clermont Auvergne, CNRS, Lab Phys Clermont, UMR 6533, Campus Cezeaux,24 Av Landais, F-63177 Aubiere, France

[3] Univ Paris Saclay, Univ Paris Sud, CNRS, Lab Phys Theor UMR 8627, F-91405 Orsay, France

来源：

EUROPEAN PHYSICAL JOURNAL C | 2017年 / 77卷 / 08期

关键词：

QCD FACTORIZATION; CP-VIOLATION; ASYMMETRIES; GAMMA; SYMMETRY;

D O I：

10.1140/epjc/s10052-017-5126-9

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We discuss the determination of the CKM angle alpha using the non-leptonic two-body decays B -> pi pi, B -> rho rho and B -> rho pi using the latest data available. We illustrate the methods used in each case and extract the corresponding value of alpha. Combining all these elements, we obtain the determination alpha(dir) = (86.2(-4.0)(+4.4) boolean OR 178.4(-5.1)(+3.9))degrees. We assess the uncertainties associated to the breakdown of the isospin hypothesis and the choice of the statistical framework in detail. We also determine the hadronic amplitudes (tree and penguin) describing the QCD dynamics involved in these decays, briefly comparing our results with theoretical expectations. For each observable of interest in the B -> pi pi, B -> rho rho and B -> rho pi systems, we perform an indirect determination based on the constraints from all the other observables available and we discuss the compatibility between indirect and direct determinations. Finally, we review the impact of future improved measurements on the determination of alpha.

引用

页数：51

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