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 |
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Article number | 074032 |
Number of pages | 12 |
Journal | Physical Review D |
Volume | 96 |
Issue number | 7 |
DOIs | |
Publication status | Published - 30 Oct 2017 |
Keywords
- EFFECTIVE FIELD-THEORY
- ANOMALOUS DIMENSIONS
- WEAK DECAYS
- 4-FERMION OPERATORS
- QCD CORRECTIONS
- RENORMALIZATION
- PARAMETER
- CURRENTS
- REGULARIZATION
- LIGHT