1086 articles – 5318 Notices  [english version]
HAL : hal-00002102, version 1

Fiche détaillée  Récupérer au format
European Physical Journal C 41 (2005) 1-131
CP Violation and the CKM Matrix: Assessing the Impact of the Asymmetric B Factories
Jérôme Charles1, Andreas Hocker2, Heiko Lacker3, Sandrine Laplace4, François R. Le Diberder2, Julie Malclès5, José Ocariz5, Muriel Pivk6, Lydia Roos5

We update the profile of the CKM matrix. The apex (rhobar,etabar) of the Unitarity Triangle is given by means of a global fit. We propose to include therein sin2alpha from the CP-violating asymmetries in B0->rho+rho-, using isospin to discriminate the penguin contribution. The constraint from epsilon'/epsilon is briefly discussed. We study the impact from the measurement of the rare decay K+->pi+nunu-bar, and from a future observation of KL->pi0nunubar. The B system is investigated in detail, beginning with 2beta+gamma and gamma from B0->D(*)+-pi-+ and B+->D(*)0K+. A significant part of this paper is dedicated to B decays into pipi, Kpi, rhopi and rhorho. Various phenomenological and theoretical approaches are studied. Within QCD Factorization we find a remarkable agreement of the pipi and Kpi data with the other UT constraints. A fit of QCD FA to all pipi and Kpi data leads to precise predictions of the related observables. We analyze separately the B->Kpi decays, and in particular the impact of electroweak penguins in response to recent phenomenological discussions. We do not observe any unambiguous sign of New Physics, whereas there is some evidence for potentially large rescattering effects. Finally we use a model-independent description of a large class of New Physics effects in both BBbar mixing and B decays, namely in the b->d and b->s gluonic penguin amplitudes, to perform a new numerical analysis. Significant non-standard corrections cannot be excluded yet, however standard solutions are favored in most cases.
1 :  FRUMAM - Fédération de Recherche des Unités de MAthématiques de Marseille
2 :  LAL - Laboratoire de l'Accélérateur Linéaire
3 :  TU - Technische Universitaet Dresden
4 :  LAPP - Laboratoire d'Annecy le Vieux de Physique des Particules
5 :  LPNHE - Laboratoire de Physique Nucléaire et de Hautes Énergies
6 :  CERN - European Organization for Nuclear Research
Physique/Physique des Hautes Energies - Phénoménologie
CKM matrix – CP violation – B physics – New Physics
Lien vers le texte intégral :