TY - JOUR
T1 - Solution to the B → πK puzzle in a flavor-changing Z′ model
AU - Barger, Vernon
AU - Chiang, Cheng Wei
AU - Langacker, Paul
AU - Lee, Hye Sung
N1 - Funding Information:
C.-W. C. would like to thank the hospitality of the high energy theory group at University of Pennsylvania during his visit. This research was supported in part by the United States Department of Energy under Grants No. EY-76-02-3071 and No. DE-FG02-95ER40896, and in part by the Wisconsin Alumni Research Foundation.
PY - 2004/9/30
Y1 - 2004/9/30
N2 - Recent experiments suggest that certain B→πK branching ratios are inconsistent with the standard model expectations. We show that a flavor-changing Z′ provides a solution to the problem. Electroweak penguin amplitudes are enhanced by the Z′ boson for select parameters. We discuss implications for the Z′ mass and its couplings to the standard model fermions. We also show that the solution is consistent with constraints from the CP asymmetries of the B→φKS decay.
AB - Recent experiments suggest that certain B→πK branching ratios are inconsistent with the standard model expectations. We show that a flavor-changing Z′ provides a solution to the problem. Electroweak penguin amplitudes are enhanced by the Z′ boson for select parameters. We discuss implications for the Z′ mass and its couplings to the standard model fermions. We also show that the solution is consistent with constraints from the CP asymmetries of the B→φKS decay.
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U2 - 10.1016/j.physletb.2004.07.057
DO - 10.1016/j.physletb.2004.07.057
M3 - Article
AN - SCOPUS:4444329074
VL - 598
SP - 218
EP - 226
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
SN - 0370-2693
IS - 3-4
ER -