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Title: Determination of {gamma} from charmless B{yields}M{sub 1}M{sub 2} decays using U-spin

Abstract

In our previous paper we applied U-spin symmetry to charmless hadronic B{sup {+-}}{yields}M{sup 0}M{sup {+-}} decays for the purpose of precise extraction of the unitarity angle {gamma}. In this paper we extend our approach to neutral B{sup 0} and B{sub s}{yields}M{sub 1}M{sub 2} decays. A very important feature of this method is that no assumptions regarding relative sizes of topological decay amplitudes need to be made. As a result, this method avoids an uncontrollable theoretical uncertainty that is often related to the neglect of some topological diagrams (e.g., exchange and annihilation graphs) in quark-diagrammatic approaches. In charged B{sup {+-}} decays, each of the four data sets, P{sup 0}P{sup {+-}}, P{sup 0}V{sup {+-}}, V{sup 0}P{sup {+-}} and V{sup 0}V{sup {+-}}, with P{identical_to}pseudoscalar and V{identical_to}vector, can be used to obtain a value of {gamma}. Among neutral decays, only experimental data in the B{sup 0}, B{sub s}{yields}P{sup -}P{sup +} subsector is sufficient for a U-spin fit. Application of the U-spin approach to the current charged and neutral B decay data yields: {gamma}=(80{sub -8}{sup +6}) deg. In this method, which is completely data driven, in a few years we should be able to obtain a model-independent determination of {gamma} with an accuracy of O(fewmore » degrees)« less

Authors:
;  [1]
  1. High Energy Theory Group, Brookhaven National Laboratory, Upton, New York 11973 (United States)
Publication Date:
OSTI Identifier:
21020053
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 75; Journal Issue: 5; Other Information: DOI: 10.1103/PhysRevD.75.054006; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ANNIHILATION; B MINUS MESONS; B NEUTRAL MESONS; B PLUS MESONS; B S MESONS; DECAY AMPLITUDES; FEYNMAN DIAGRAM; PARTICLE DECAY; PSEUDOSCALAR MESONS; QUARKS; SPIN; SYMMETRY; TOPOLOGY; UNITARITY; VECTOR MESONS

Citation Formats

Soni, Amarjit, and Suprun, Denis A. Determination of {gamma} from charmless B{yields}M{sub 1}M{sub 2} decays using U-spin. United States: N. p., 2007. Web. doi:10.1103/PHYSREVD.75.054006.
Soni, Amarjit, & Suprun, Denis A. Determination of {gamma} from charmless B{yields}M{sub 1}M{sub 2} decays using U-spin. United States. doi:10.1103/PHYSREVD.75.054006.
Soni, Amarjit, and Suprun, Denis A. Thu . "Determination of {gamma} from charmless B{yields}M{sub 1}M{sub 2} decays using U-spin". United States. doi:10.1103/PHYSREVD.75.054006.
@article{osti_21020053,
title = {Determination of {gamma} from charmless B{yields}M{sub 1}M{sub 2} decays using U-spin},
author = {Soni, Amarjit and Suprun, Denis A.},
abstractNote = {In our previous paper we applied U-spin symmetry to charmless hadronic B{sup {+-}}{yields}M{sup 0}M{sup {+-}} decays for the purpose of precise extraction of the unitarity angle {gamma}. In this paper we extend our approach to neutral B{sup 0} and B{sub s}{yields}M{sub 1}M{sub 2} decays. A very important feature of this method is that no assumptions regarding relative sizes of topological decay amplitudes need to be made. As a result, this method avoids an uncontrollable theoretical uncertainty that is often related to the neglect of some topological diagrams (e.g., exchange and annihilation graphs) in quark-diagrammatic approaches. In charged B{sup {+-}} decays, each of the four data sets, P{sup 0}P{sup {+-}}, P{sup 0}V{sup {+-}}, V{sup 0}P{sup {+-}} and V{sup 0}V{sup {+-}}, with P{identical_to}pseudoscalar and V{identical_to}vector, can be used to obtain a value of {gamma}. Among neutral decays, only experimental data in the B{sup 0}, B{sub s}{yields}P{sup -}P{sup +} subsector is sufficient for a U-spin fit. Application of the U-spin approach to the current charged and neutral B decay data yields: {gamma}=(80{sub -8}{sup +6}) deg. In this method, which is completely data driven, in a few years we should be able to obtain a model-independent determination of {gamma} with an accuracy of O(few degrees)},
doi = {10.1103/PHYSREVD.75.054006},
journal = {Physical Review. D, Particles Fields},
number = 5,
volume = 75,
place = {United States},
year = {Thu Mar 01 00:00:00 EST 2007},
month = {Thu Mar 01 00:00:00 EST 2007}
}