Charming loops in exclusive rare FCNC $B$-decays

TL;DR

This paper investigates the role of charming loops in rare FCNC B-decays, aiming to improve theoretical control over QCD effects to better identify potential new physics signals.

Contribution

It analyzes charming loop contributions in rare B-decays and discusses methods to better control these QCD effects for clearer new physics detection.

Findings

Charming loops can significantly affect FCNC B-decay observables.

Controlling charming loop contributions is crucial for new physics searches.

Proposed approaches may improve theoretical predictions for charming loops.

Abstract

Rare $B$-decays induced by flavour-changing neutral currents (FCNC) is one of the promising candidates for probing physics beyond the Standard model. However, for identifying potential new physics from the data, reliable control over QCD contributions is necessary. We focus on one of such QCD contributions - the charming loops - that potentially can lead to difficulties in disentangling new physics effects from the observables and discuss the possibility to gain control over theoretical predictions for charming loops.