Vector quark model and B→Xsγ decay

Chia-Hung Chang, Darwin Chang, Wai Yee Keung

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

We study the B meson radiative decay B→Xsγ in the vector quark model. Deviation from the standard model arises from the nonunitarity of the charged current Kobayashi-Maskawa matrix and related new flavor changing neutral current interactions. We establish the relation between the nonunitarity of the charged current mixing matrix and the mixing among the vector quark and ordinary quarks. We also explicitly make the close connection between this nonunitarity and the flavor changing neutral currents. The complete calculation including the leading logarithmic QCD correction is carefully carried out. Using the most updated data and the next to leading order theoretical calculation, the branching fraction of the observed B meson radiative decay places a limit on the mixing angles as stringent as that from the process B→Xμμ̄.

Original languageEnglish
Article number053007
Pages (from-to)1-10
Number of pages10
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume61
Issue number5
Publication statusPublished - 2000 Mar 1

Fingerprint

quark models
neutral currents
decay
mesons
quarks
matrices
quantum chromodynamics
deviation
interactions

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

Cite this

Vector quark model and B→Xsγ decay. / Chang, Chia-Hung; Chang, Darwin; Keung, Wai Yee.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 61, No. 5, 053007, 01.03.2000, p. 1-10.

Research output: Contribution to journalArticle

@article{6d8f8ba01a1e40feb728aa6ae8fd13b7,
title = "Vector quark model and B→Xsγ decay",
abstract = "We study the B meson radiative decay B→Xsγ in the vector quark model. Deviation from the standard model arises from the nonunitarity of the charged current Kobayashi-Maskawa matrix and related new flavor changing neutral current interactions. We establish the relation between the nonunitarity of the charged current mixing matrix and the mixing among the vector quark and ordinary quarks. We also explicitly make the close connection between this nonunitarity and the flavor changing neutral currents. The complete calculation including the leading logarithmic QCD correction is carefully carried out. Using the most updated data and the next to leading order theoretical calculation, the branching fraction of the observed B meson radiative decay places a limit on the mixing angles as stringent as that from the process B→Xμμ̄.",
author = "Chia-Hung Chang and Darwin Chang and Keung, {Wai Yee}",
year = "2000",
month = "3",
day = "1",
language = "English",
volume = "61",
pages = "1--10",
journal = "Physical Review D - Particles, Fields, Gravitation and Cosmology",
issn = "1550-7998",
number = "5",

}

TY - JOUR

T1 - Vector quark model and B→Xsγ decay

AU - Chang, Chia-Hung

AU - Chang, Darwin

AU - Keung, Wai Yee

PY - 2000/3/1

Y1 - 2000/3/1

N2 - We study the B meson radiative decay B→Xsγ in the vector quark model. Deviation from the standard model arises from the nonunitarity of the charged current Kobayashi-Maskawa matrix and related new flavor changing neutral current interactions. We establish the relation between the nonunitarity of the charged current mixing matrix and the mixing among the vector quark and ordinary quarks. We also explicitly make the close connection between this nonunitarity and the flavor changing neutral currents. The complete calculation including the leading logarithmic QCD correction is carefully carried out. Using the most updated data and the next to leading order theoretical calculation, the branching fraction of the observed B meson radiative decay places a limit on the mixing angles as stringent as that from the process B→Xμμ̄.

AB - We study the B meson radiative decay B→Xsγ in the vector quark model. Deviation from the standard model arises from the nonunitarity of the charged current Kobayashi-Maskawa matrix and related new flavor changing neutral current interactions. We establish the relation between the nonunitarity of the charged current mixing matrix and the mixing among the vector quark and ordinary quarks. We also explicitly make the close connection between this nonunitarity and the flavor changing neutral currents. The complete calculation including the leading logarithmic QCD correction is carefully carried out. Using the most updated data and the next to leading order theoretical calculation, the branching fraction of the observed B meson radiative decay places a limit on the mixing angles as stringent as that from the process B→Xμμ̄.

UR - http://www.scopus.com/inward/record.url?scp=17144377497&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=17144377497&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:17144377497

VL - 61

SP - 1

EP - 10

JO - Physical Review D - Particles, Fields, Gravitation and Cosmology

JF - Physical Review D - Particles, Fields, Gravitation and Cosmology

SN - 1550-7998

IS - 5

M1 - 053007

ER -