Author:
Crivellin Andreas,Eguren Jordi Folch,Virto Javier
Abstract
Abstract
Leptoquarks provide viable solutions to the flavour anomalies, i.e. they can explain the tensions between the measurements and the Standard Model predictions of the anomalous magnetic moment of the muon as well as b → sℓ+ℓ− and b → cτν processes. However, LQs also contribute to other flavour observables, such as ∆F = 2 processes, at the loop-level. In particular, Bs−$$ \overline{B} $$
B
¯
s mixing provides a crucial bound in setups addressing b → cτν data, often excluding a big portion of the parameter space that could otherwise account for it. In this article, we first derive the complete leading order matching, including all five scalar LQ representations, for D0−$$ \overline{D} $$
D
¯
0, K0−$$ \overline{K} $$
K
¯
0 and Bs,d−$$ \overline{B} $$
B
¯
s,d mixing (at the dimension-six level). We then calculate the next-to-leading order αs matching corrections to these ∆F = 2 processes in generic scalar leptoquark models. We find that the two-loop corrections increase the effects in ∆F = 2 processes by ~ 5-10% and significantly reduce the matching scale uncertainty.
Publisher
Springer Science and Business Media LLC
Subject
Nuclear and High Energy Physics
Cited by
6 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献