Solution to the B → πK puzzle in a flavor-changing Z′ model

Vernon Barger; Cheng Wei Chiang; Paul Langacker; Hye Sung Lee

doi:10.1016/j.physletb.2004.07.057

Solution to the B → πK puzzle in a flavor-changing Z′ model

Vernon Barger, Cheng Wei Chiang, Paul Langacker, Hye Sung Lee

Physics

Research output: Contribution to journal › Article › peer-review

153 Scopus citations

Abstract

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.

Original language	English (US)
Pages (from-to)	218-226
Number of pages	9
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	598
Issue number	3-4
DOIs	https://doi.org/10.1016/j.physletb.2004.07.057
State	Published - Sep 30 2004

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics

Access to Document

10.1016/j.physletb.2004.07.057

Cite this

@article{9cf79b3dff624c6c9ebcf55907f96229,

title = "Solution to the B → πK puzzle in a flavor-changing Z′ model",

abstract = "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.",

author = "Vernon Barger and Chiang, {Cheng Wei} and Paul Langacker and Lee, {Hye Sung}",

note = "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. ",

year = "2004",

month = sep,

day = "30",

doi = "10.1016/j.physletb.2004.07.057",

language = "English (US)",

volume = "598",

pages = "218--226",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier B.V.",

number = "3-4",

}

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.

UR - http://www.scopus.com/inward/record.url?scp=4444329074&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=4444329074&partnerID=8YFLogxK

U2 - 10.1016/j.physletb.2004.07.057

DO - 10.1016/j.physletb.2004.07.057

M3 - Article

AN - SCOPUS:4444329074

SN - 0370-2693

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

IS - 3-4

ER -

Solution to the B → πK puzzle in a flavor-changing Z′ model

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this