Towards a next-to-next-to-leading order analysis of matching in B0−B¯0 mixing

Andrey G. Grozin; Thomas Mannel; Alexei A. Pivovarov

doi:10.1103/PhysRevD.96.074032

Towards a next-to-next-to-leading order analysis of matching in B0−B¯0 mixing

Andrey G. Grozin, Thomas Mannel, Alexei A. Pivovarov

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

12 Citations (Scopus)

Abstract

We compute perturbative corrections to matching coefficients of QCD to heavy quark effective theory (HQET) for the matrix element of the ΔB=2 operator that determines the mass difference in B0-B0 system of states. This involves the technical point of choosing the operator basis in HQET, separating physical operators from evanescent ones. We obtain an analytical result for some of the two-loop corrections at order αs2.

Original language	English
Article number	074032
Number of pages	12
Journal	Physical Review D
Volume	96
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevD.96.074032
Publication status	Published - 30 Oct 2017

Keywords

EFFECTIVE FIELD-THEORY
ANOMALOUS DIMENSIONS
WEAK DECAYS
4-FERMION OPERATORS
QCD CORRECTIONS
RENORMALIZATION
PARAMETER
CURRENTS
REGULARIZATION
LIGHT

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10.1103/PhysRevD.96.074032

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abstract = "We compute perturbative corrections to matching coefficients of QCD to heavy quark effective theory (HQET) for the matrix element of the ΔB=2 operator that determines the mass difference in B0-B0 system of states. This involves the technical point of choosing the operator basis in HQET, separating physical operators from evanescent ones. We obtain an analytical result for some of the two-loop corrections at order αs2.",

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AU - Mannel, Thomas

AU - Pivovarov, Alexei A.

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AB - We compute perturbative corrections to matching coefficients of QCD to heavy quark effective theory (HQET) for the matrix element of the ΔB=2 operator that determines the mass difference in B0-B0 system of states. This involves the technical point of choosing the operator basis in HQET, separating physical operators from evanescent ones. We obtain an analytical result for some of the two-loop corrections at order αs2.

KW - EFFECTIVE FIELD-THEORY

KW - ANOMALOUS DIMENSIONS

KW - WEAK DECAYS

KW - 4-FERMION OPERATORS

KW - QCD CORRECTIONS

KW - RENORMALIZATION

KW - PARAMETER

KW - CURRENTS

KW - REGULARIZATION

KW - LIGHT

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SN - 2470-0010

IS - 7

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ER -

Towards a next-to-next-to-leading order analysis of matching in B0−B¯0 mixing

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Keywords

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