The inclusive decay b to ccs revisited

TL;DR

This paper refines the theoretical prediction of the inclusive decay rate of b to ccs by recalculating NLO-QCD corrections and including penguin diagram effects, leading to a precise branching ratio estimate crucial for new physics searches.

Contribution

It provides the full expressions for NLO-QCD corrections and incorporates previously neglected penguin diagram corrections in the b to ccs decay analysis.

Findings

Predicted branching ratio Br(b to ccs) = (23 ± 2)%

Enhanced decay rate due to QCD corrections

Improved theoretical precision for B decay studies

Abstract

The inclusive decay rate b to ccs is enhanced considerably due to perturbative QCD corrections. We recalculate the dominant part of the NLO-QCD corrections, because they cannot be reconstructed from the literature and we give the full expressions in this paper. Further we include some previously neglected corrections originating from penguin diagrams. Combined with the impressive progress in the accurate determination of input parameters like charm quark mass, bottom quark mass and CKM parameters, this enables us to make a very precise prediction of the corresponding branching ratio Br (b to ccs) = (23 pm 2)%. This result is an essential ingredient for a model and even decay channel independent search for new physics effects in B decays.