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Title: Extracting the quark mixing phase {alpha} from B{sub d}{sup 0}{yields}K{sup 0}K{sup 0} decays

Abstract

We propose a new method for obtaining the CP phase {alpha}, based on measurements of B{sub d}{sup 0}{yields}K{sup 0}K{sup 0}, along with theoretical input. Because of the similarities of QCD factorization (QCDf) and perturbative QCD (pQCD), this input is basically the same for each of these models. Although the theoretical error is large at present, many of the contributing quantities will be better known in the future, leading to a smaller error. One outstanding question is the extent to which the precision on quark masses, especially m{sub c}/m{sub b}, can be improved. If one assumes that new physics is not present, the method can be used to predict the values of CP asymmetries in B{sub d}{sup 0}{yields}K{sup 0}K{sup 0}: 0.02{<=}A{sub dir}{sup 2}+A{sub mix}{sup 2}{<=}0.125. A result outside this range would signal the existence of long-distance effects beyond those included in models of nonleptonic decays based on factorization (such as QCDf and pQCD), or the presence of new physics.

Authors:
 [1]; ;  [2];  [3]
  1. Dept of Physics and Astronomy, 108 Lewis Hall, University of Mississippi, Oxford, Mississippi 38677-1848 (United States)
  2. Physique des Particules, Universite de Montreal, C.P. 6128, succ. centre-ville, Montreal, QC, H3C 3J7 (Canada)
  3. IFAE, Universitat Autonoma de Barcelona, 08193 Bellaterra, Barcelona (Spain)
Publication Date:
OSTI Identifier:
21020468
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 75; Journal Issue: 9; Other Information: DOI: 10.1103/PhysRevD.75.093004; (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; ACCURACY; ASYMMETRY; B NEUTRAL MESONS; CP INVARIANCE; ERRORS; FACTORIZATION; KAONS NEUTRAL; MIXING; PERTURBATION THEORY; QUANTUM CHROMODYNAMICS; QUARKS; REST MASS; WEAK HADRONIC DECAY

Citation Formats

Datta, Alakabha, Imbeault, Maxime, London, David, and Matias, Joaquim. Extracting the quark mixing phase {alpha} from B{sub d}{sup 0}{yields}K{sup 0}K{sup 0} decays. United States: N. p., 2007. Web. doi:10.1103/PHYSREVD.75.093004.
Datta, Alakabha, Imbeault, Maxime, London, David, & Matias, Joaquim. Extracting the quark mixing phase {alpha} from B{sub d}{sup 0}{yields}K{sup 0}K{sup 0} decays. United States. doi:10.1103/PHYSREVD.75.093004.
Datta, Alakabha, Imbeault, Maxime, London, David, and Matias, Joaquim. Tue . "Extracting the quark mixing phase {alpha} from B{sub d}{sup 0}{yields}K{sup 0}K{sup 0} decays". United States. doi:10.1103/PHYSREVD.75.093004.
@article{osti_21020468,
title = {Extracting the quark mixing phase {alpha} from B{sub d}{sup 0}{yields}K{sup 0}K{sup 0} decays},
author = {Datta, Alakabha and Imbeault, Maxime and London, David and Matias, Joaquim},
abstractNote = {We propose a new method for obtaining the CP phase {alpha}, based on measurements of B{sub d}{sup 0}{yields}K{sup 0}K{sup 0}, along with theoretical input. Because of the similarities of QCD factorization (QCDf) and perturbative QCD (pQCD), this input is basically the same for each of these models. Although the theoretical error is large at present, many of the contributing quantities will be better known in the future, leading to a smaller error. One outstanding question is the extent to which the precision on quark masses, especially m{sub c}/m{sub b}, can be improved. If one assumes that new physics is not present, the method can be used to predict the values of CP asymmetries in B{sub d}{sup 0}{yields}K{sup 0}K{sup 0}: 0.02{<=}A{sub dir}{sup 2}+A{sub mix}{sup 2}{<=}0.125. A result outside this range would signal the existence of long-distance effects beyond those included in models of nonleptonic decays based on factorization (such as QCDf and pQCD), or the presence of new physics.},
doi = {10.1103/PHYSREVD.75.093004},
journal = {Physical Review. D, Particles Fields},
number = 9,
volume = 75,
place = {United States},
year = {Tue May 01 00:00:00 EDT 2007},
month = {Tue May 01 00:00:00 EDT 2007}
}