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 journalArticlepeer-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 languageEnglish
Article number074032
Number of pages12
JournalPhysical Review D
Volume96
Issue number7
DOIs
Publication statusPublished - 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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