QCD corrections to $B$-meson mixing at two loops and beyond

Shtabovenko, Vladyslav

doi:10.22323/1.411.0109

QCD corrections to $B$ -meson mixing at two loops and beyond

Vladyslav Shtabovenko
(
- Karlsruhe U., TTP
)

Jan 13, 2023

10 pages

Published in:

PoS CKM2021 (2023) 109

Contribution to:

- CKM 2021
, 109

Published: Jan 13, 2023

DOI:

10.22323/1.411.0109

pdf

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Abstract: (SISSA)

We report on the updated theoretical predictions for the width difference

\Delta \Gamma_s

and the flavor-specific CP asymmetry

a^s_{\textrm{fs}}

in the

B_s - \bar{B}_s

mixing. Working at leading power in the Heavy Quark Expansion we evaluated all previously unknown two-loop contributions to this observable, which marks an important step in the task of reducing uncomfortably large scale uncertainties stemming from uncalculated QCD corrections. Our new the Standard-Model prediction for the ratio of the width and mass differences in the

\overline{\textrm{MS}}

scheme reads

\Delta \Gamma_s/\Delta M_s= (5.20\pm 0.69)\cdot 10^{-3}

.

quantum chromodynamics: correction
width: difference
width: ratio
asymmetry: CP
mixing
heavy quark
mass difference

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QCD corrections to $B$ -meson mixing at two loops and beyond

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- PoS CKM2021 (2023) 109
•
DOI:
- 10.22323/1.411.0109

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QCD corrections to BBB-meson mixing at two loops and beyond

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QCD corrections to $B$ -meson mixing at two loops and beyond