Nonfactorizable charming-loop contribution to FCNC <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>B</mml:mi><mml:mi>s</mml:mi></mml:msub><mml:mo stretchy="false">→</mml:mo><mml:mi>γ</mml:mi><mml:msup><mml:mi>l</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:msup><mml:mi>l</mml:mi><mml:mo>−</mml:mo></mml:msup></mml:math> decay-Reference-Cited by-同舟云学术

Nonfactorizable charming-loop contribution to FCNC Bs→γl+l− decay

Published:2024-06-10 Issue:11 Volume:109 Page:
ISSN:2470-0010
Container-title:Physical Review D
language:en
Short-container-title:Phys. Rev. D

Author:

Belov Ilia¹^ORCID,Berezhnoy Alexander²^ORCID,Melikhov Dmitri²³⁴^ORCID

Affiliation:

1. INFN

2. M. V. Lomonosov Moscow State University

3. Joint Institute for Nuclear Research

4. University of Vienna

Abstract

We present the first theoretical calculation of nonfactorizable charm-quark loop contributions to the Bs→γl+l− amplitude. We calculate the relevant form factors, HA,VNF(k′2,k2), and provide convenient parametrizations of our results in the form of fit functions of two variables, k′2 and k2, applicable in the region below hadron resonances, k′2<MJ/ψ2 and k2<Mϕ2. We report that factorizable and nonfactorizable charm contributions to the Bs→γl+l− amplitude have opposite signs. To compare the charm and the top contributions, it is convenient to express nonfactorizable charming loop contribution as a nonuniversal (i.e., dependent on the reaction) q2-dependent correction ΔNFC7(q2) to the Wilson coefficient C7. For the Bs→γl+l− amplitude, the correction is found to be positive, ΔNFC7(q2)/C7>0.

Published by the American Physical Society

2024

Publisher

American Physical Society (APS)

Link

http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.109.114012/fulltext

Reference59 articles.

1. Charming-loop contribution to Bs→γγ decay

2. Penguins with charm and quark–hadron duality

3. Lessons from the B0,+→K*0,+μ+μ− angular analyses

4. Charming penguins and lepton universality violation in $$\varvec{b \rightarrow s \ell ^+ \ell ^-}$$ decays

5. B Discrepancies Hold Their Ground