Next-to-leading-order matching for the magnetic photon-penguin operator in the B → Xsγ decay

Andrzej J. Buras; Axel Kwiatkowski; Nicolas Pott

doi:10.1016/S0550-3213(98)00109-6

Next-to-leading-order matching for the magnetic photon-penguin operator in the B → X_sγ decay

Andrzej J. Buras, Axel Kwiatkowski, Nicolas Pott

Chair of Theoretical Elementary Particle Physics

Technical University of Munich

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

70 Scopus citations

Abstract

The initial condition at the matching scale μ_w = script O sign(M_w) for the Wilson coefficient of the magnetic photon-penguin operator in the decay B → X_sγ is calculated in the next-to-leading-order approximation. The technical details of the necessary two-loop calculation in the full theory are described and the matching with the corresponding result in the effective theory is discussed in detail. Our outcome for the initial condition confirms the final results of Adel and Yao and Greub and Hurth. We show that the matching procedure can be properly performed for infrared divergent amplitudes, i.e. independently of contributions from gluon bremsstrahlung.

Original language	English
Pages (from-to)	353-373
Number of pages	21
Journal	Nuclear Physics, Section B
Volume	517
Issue number	1-3
DOIs	https://doi.org/10.1016/S0550-3213(98)00109-6
State	Published - 27 Apr 1998

Access to Document

10.1016/S0550-3213(98)00109-6

Cite this

@article{3da47c136a334f33a023f2acdf01eab8,

title = "Next-to-leading-order matching for the magnetic photon-penguin operator in the B → Xsγ decay",

abstract = "The initial condition at the matching scale μw = script O sign(Mw) for the Wilson coefficient of the magnetic photon-penguin operator in the decay B → Xsγ is calculated in the next-to-leading-order approximation. The technical details of the necessary two-loop calculation in the full theory are described and the matching with the corresponding result in the effective theory is discussed in detail. Our outcome for the initial condition confirms the final results of Adel and Yao and Greub and Hurth. We show that the matching procedure can be properly performed for infrared divergent amplitudes, i.e. independently of contributions from gluon bremsstrahlung.",

author = "Buras, {Andrzej J.} and Axel Kwiatkowski and Nicolas Pott",

note = "Funding Information: * Supported by the German Bundesministerium for Bildung and Forschung under contract 06 TM 874 and DFG Project Li 519/2-2.",

year = "1998",

month = apr,

day = "27",

doi = "10.1016/S0550-3213(98)00109-6",

language = "English",

volume = "517",

pages = "353--373",

journal = "Nuclear Physics, Section B",

issn = "0550-3213",

publisher = "Elsevier B.V.",

number = "1-3",

}

TY - JOUR

T1 - Next-to-leading-order matching for the magnetic photon-penguin operator in the B → Xsγ decay

AU - Buras, Andrzej J.

AU - Kwiatkowski, Axel

AU - Pott, Nicolas

N1 - Funding Information: * Supported by the German Bundesministerium for Bildung and Forschung under contract 06 TM 874 and DFG Project Li 519/2-2.

PY - 1998/4/27

Y1 - 1998/4/27

N2 - The initial condition at the matching scale μw = script O sign(Mw) for the Wilson coefficient of the magnetic photon-penguin operator in the decay B → Xsγ is calculated in the next-to-leading-order approximation. The technical details of the necessary two-loop calculation in the full theory are described and the matching with the corresponding result in the effective theory is discussed in detail. Our outcome for the initial condition confirms the final results of Adel and Yao and Greub and Hurth. We show that the matching procedure can be properly performed for infrared divergent amplitudes, i.e. independently of contributions from gluon bremsstrahlung.

AB - The initial condition at the matching scale μw = script O sign(Mw) for the Wilson coefficient of the magnetic photon-penguin operator in the decay B → Xsγ is calculated in the next-to-leading-order approximation. The technical details of the necessary two-loop calculation in the full theory are described and the matching with the corresponding result in the effective theory is discussed in detail. Our outcome for the initial condition confirms the final results of Adel and Yao and Greub and Hurth. We show that the matching procedure can be properly performed for infrared divergent amplitudes, i.e. independently of contributions from gluon bremsstrahlung.

UR - http://www.scopus.com/inward/record.url?scp=0032571661&partnerID=8YFLogxK

U2 - 10.1016/S0550-3213(98)00109-6

DO - 10.1016/S0550-3213(98)00109-6

M3 - Article

AN - SCOPUS:0032571661

SN - 0550-3213

VL - 517

SP - 353

EP - 373

JO - Nuclear Physics, Section B

JF - Nuclear Physics, Section B

IS - 1-3

ER -

Next-to-leading-order matching for the magnetic photon-penguin operator in the B → X_sγ decay

Abstract

Access to Document

Other files and links

Fingerprint

Cite this