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"Etude des désintégrations B+/- -> K+/- pi0 et B+/- -> pi+/- pi0 avec le détecteur BABAR et contraintes des modes B -> pipi, Kpi, KK sur la matrice CKM."

Abstract : The analysis of B+/- -> pi+/- pi0 et B+/- -> K+/- pi0 modes has been done with a sample of $227$ millions of B pairs corresponding to $205 fb^{-1}$ of data collected between october 1999 and july 2004 with the BABAR detector. The branchinf ratios and CP asymmetries obtained are: B( B+/- -> pi+/- pi0) = (5.57 +/- 0.60 +/- 0.33) 10E-6 B( B+/- -> K+/- pi0) = (11.50 +/- 0.65 +/- 0.57) 10E-6 Acp( B+/- -> pi+/- pi0) = -0.01 +/- 0.10 +/- 0.02 Acp( B+/- -> K+/- pi0)= 0.06 +/- 0.06 +/- 0.01 The constraints on the angle alpha of the unitarity triangle have been derived from the isospin analysis of B -> pi pi modes. The isospin symmetry has also been used to relate B -> K pi modes in order to constraint the CKM matrix. More significant constraints have been obtained with the SU(3) symmetry for B, Bs -> pipi/ Kpi/ KK modes. They are in good agreement with the Standard CKM fit. It has been shown that such an analysis will be competitive with the Standard CKM fit in the future and will allow to determine SU(3) breaking or New Physics parameters from data.
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https://tel.archives-ouvertes.fr/tel-00175074
Contributor : Julie Malcles <>
Submitted on : Saturday, January 17, 2009 - 4:55:47 PM
Last modification on : Monday, October 19, 2020 - 11:03:58 AM
Long-term archiving on: : Wednesday, September 22, 2010 - 11:16:36 AM

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  • HAL Id : tel-00175074, version 2

Citation

Julie Malcles. "Etude des désintégrations B+/- -> K+/- pi0 et B+/- -> pi+/- pi0 avec le détecteur BABAR et contraintes des modes B -> pipi, Kpi, KK sur la matrice CKM.". Physique des Hautes Energies - Expérience [hep-ex]. Université Pierre et Marie Curie - Paris VI, 2006. Français. ⟨tel-00175074v2⟩

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