CP asymmetry in flavour-specific B decays beyond leading logarithms

Martin Beneke; Gerhard Buchalla; Alexander Lenz; Ulrich Nierste

doi:10.1016/j.physletb.2003.09.089

CP asymmetry in flavour-specific B decays beyond leading logarithms

Martin Beneke
, Gerhard Buchalla
, Alexander Lenz
, Ulrich Nierste

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

156 Scopus citations

Abstract

We compute next-to-leading order QCD corrections to the CP asymmetry a _fs=Im(Γ₁₂/M₁₂) in flavour-specific B _d,s decays such as B_d → Xℓv̄ _ℓ or Bs → D_s^-π⁺. The corrections reduce the uncertainties associated with the choice of the renormalization scheme for the quark masses significantly. In the Standard Model we predict a_fs^d=-(5.0±1.1) × 10 ^-4. As a by-product we also obtain the width difference in the Bd system at next-to-leading order in QCD.

Original language	English
Pages (from-to)	173-183
Number of pages	11
Journal	Physics Letters B
Volume	576
Issue number	1-2
DOIs	https://doi.org/10.1016/j.physletb.2003.09.089
State	Published - 4 Dec 2003
Externally published	Yes

Keywords

Asymmetry
B/s0
B0 anti-B0
CP
Mixing angle
Semileptonic decay

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10.1016/j.physletb.2003.09.089

Cite this

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title = "CP asymmetry in flavour-specific B decays beyond leading logarithms",

abstract = "We compute next-to-leading order QCD corrections to the CP asymmetry a fs=Im(Γ12/M12) in flavour-specific B d,s decays such as Bd → Xℓ{\=v} ℓ or Bs → Ds-π+. The corrections reduce the uncertainties associated with the choice of the renormalization scheme for the quark masses significantly. In the Standard Model we predict afsd=-(5.0±1.1) × 10 -4. As a by-product we also obtain the width difference in the Bd system at next-to-leading order in QCD.",

keywords = "Asymmetry, B/s0, B0 anti-B0, CP, Mixing angle, Semileptonic decay",

author = "Martin Beneke and Gerhard Buchalla and Alexander Lenz and Ulrich Nierste",

note = "Funding Information: The work of M.B. is supported in part by the Bundesministerium f{\"u}r Bildung und Forschung, Project 05 HT1PAB/2, and by the DFG Sonderforschungsbereich/Transregio 9 “Computer-gest{\"u}tzte Theoretische Teilchenphysik”. ",

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doi = "10.1016/j.physletb.2003.09.089",

language = "English",

volume = "576",

pages = "173--183",

journal = "Physics Letters B",

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TY - JOUR

T1 - CP asymmetry in flavour-specific B decays beyond leading logarithms

AU - Beneke, Martin

AU - Buchalla, Gerhard

AU - Lenz, Alexander

AU - Nierste, Ulrich

N1 - Funding Information: The work of M.B. is supported in part by the Bundesministerium für Bildung und Forschung, Project 05 HT1PAB/2, and by the DFG Sonderforschungsbereich/Transregio 9 “Computer-gestützte Theoretische Teilchenphysik”.

PY - 2003/12/4

Y1 - 2003/12/4

N2 - We compute next-to-leading order QCD corrections to the CP asymmetry a fs=Im(Γ12/M12) in flavour-specific B d,s decays such as Bd → Xℓv̄ ℓ or Bs → Ds-π+. The corrections reduce the uncertainties associated with the choice of the renormalization scheme for the quark masses significantly. In the Standard Model we predict afsd=-(5.0±1.1) × 10 -4. As a by-product we also obtain the width difference in the Bd system at next-to-leading order in QCD.

AB - We compute next-to-leading order QCD corrections to the CP asymmetry a fs=Im(Γ12/M12) in flavour-specific B d,s decays such as Bd → Xℓv̄ ℓ or Bs → Ds-π+. The corrections reduce the uncertainties associated with the choice of the renormalization scheme for the quark masses significantly. In the Standard Model we predict afsd=-(5.0±1.1) × 10 -4. As a by-product we also obtain the width difference in the Bd system at next-to-leading order in QCD.

KW - Asymmetry

KW - B/s0

KW - B0 anti-B0

KW - CP

KW - Mixing angle

KW - Semileptonic decay

UR - https://www.scopus.com/pages/publications/1642295179

U2 - 10.1016/j.physletb.2003.09.089

DO - 10.1016/j.physletb.2003.09.089

M3 - Article

AN - SCOPUS:1642295179

SN - 0370-2693

VL - 576

SP - 173

EP - 183

JO - Physics Letters B

JF - Physics Letters B

IS - 1-2

ER -

CP asymmetry in flavour-specific B decays beyond leading logarithms

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Keywords

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