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Title: Nonuniversal Z{sup '} couplings in B decays

Abstract

We study the impacts of the nonuniversal Z{sup '} model, providing flavor-changing neutral current at tree level, on the branching ratios (BRs), CP asymmetries (CPAs), and polarization fractions of B decays. We find that, for satisfying the current data, the new left- and right-handed couplings have to be included at the same time. The new introduced effective interactions not only could effectively explain the puzzle of small longitudinal polarization in B{yields}K*{phi} decays, but also provide a solution to the small CPA of B{sup {+-}}{yields}{pi}{sup 0}K{sup {+-}}. We also find that the favorable CPA of B{sup {+-}}{yields}{pi}{sup 0}K{sup {+-}} is opposite in sign to the standard model; meanwhile, the CPA of B{sub d}{yields}{pi}{sup 0}K has to be smaller than -10%. In addition, by using the values of parameters which are constrained by B{yields}{pi}K, we find that the favorable ranges of BRs, CPAs, longitudinal polarizations, and perpendicular transverse polarizations for (B{sup {+-}}{yields}{rho}{sup {+-}}K*,B{sub d}{yields}{rho}{sup {+-}}K*{sup {+-}}) are (17.1{+-}3.9,10.0{+-}2.0)x10{sup -6}, (3{+-}5,21{+-}7)%, (0.66{+-}0.10,0.44{+-}0.08), and (0.14{+-}0.10,0.25{+-}0.09), respectively.

Authors:
 [1];  [2];  [3]
  1. Department of Physics, National Cheng-Kung University, Tainan 701, Taiwan (China)
  2. (China)
  3. Department of Physics, National Tsing-Hua University, Hsin-Chu 300, Taiwan (China)
Publication Date:
OSTI Identifier:
20782834
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 73; Journal Issue: 7; Other Information: DOI: 10.1103/PhysRevD.73.075003; (c) 2006 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; ASYMMETRY; B MESONS; BRANCHING RATIO; CP INVARIANCE; HADRONIC PARTICLE DECAY; K*-892 MESONS; KAONS MINUS; KAONS PLUS; MATHEMATICAL SOLUTIONS; NEUTRAL CURRENTS; PARTICLE INTERACTIONS; PIONS NEUTRAL; POLARIZATION; STANDARD MODEL

Citation Formats

Chen, C.-H., National Center for Theoretical Sciences, Taiwan, and Hatanaka, Hisaki. Nonuniversal Z{sup '} couplings in B decays. United States: N. p., 2006. Web. doi:10.1103/PHYSREVD.73.075003.
Chen, C.-H., National Center for Theoretical Sciences, Taiwan, & Hatanaka, Hisaki. Nonuniversal Z{sup '} couplings in B decays. United States. doi:10.1103/PHYSREVD.73.075003.
Chen, C.-H., National Center for Theoretical Sciences, Taiwan, and Hatanaka, Hisaki. Sat . "Nonuniversal Z{sup '} couplings in B decays". United States. doi:10.1103/PHYSREVD.73.075003.
@article{osti_20782834,
title = {Nonuniversal Z{sup '} couplings in B decays},
author = {Chen, C.-H. and National Center for Theoretical Sciences, Taiwan and Hatanaka, Hisaki},
abstractNote = {We study the impacts of the nonuniversal Z{sup '} model, providing flavor-changing neutral current at tree level, on the branching ratios (BRs), CP asymmetries (CPAs), and polarization fractions of B decays. We find that, for satisfying the current data, the new left- and right-handed couplings have to be included at the same time. The new introduced effective interactions not only could effectively explain the puzzle of small longitudinal polarization in B{yields}K*{phi} decays, but also provide a solution to the small CPA of B{sup {+-}}{yields}{pi}{sup 0}K{sup {+-}}. We also find that the favorable CPA of B{sup {+-}}{yields}{pi}{sup 0}K{sup {+-}} is opposite in sign to the standard model; meanwhile, the CPA of B{sub d}{yields}{pi}{sup 0}K has to be smaller than -10%. In addition, by using the values of parameters which are constrained by B{yields}{pi}K, we find that the favorable ranges of BRs, CPAs, longitudinal polarizations, and perpendicular transverse polarizations for (B{sup {+-}}{yields}{rho}{sup {+-}}K*,B{sub d}{yields}{rho}{sup {+-}}K*{sup {+-}}) are (17.1{+-}3.9,10.0{+-}2.0)x10{sup -6}, (3{+-}5,21{+-}7)%, (0.66{+-}0.10,0.44{+-}0.08), and (0.14{+-}0.10,0.25{+-}0.09), respectively.},
doi = {10.1103/PHYSREVD.73.075003},
journal = {Physical Review. D, Particles Fields},
number = 7,
volume = 73,
place = {United States},
year = {Sat Apr 01 00:00:00 EST 2006},
month = {Sat Apr 01 00:00:00 EST 2006}
}