Charged-Higgs effects in B --> (D) tau nu decays

TL;DR

This paper evaluates how well leptonic and semileptonic B meson decays can detect or constrain the presence of a charged Higgs boson, updating previous analyses.

Contribution

It provides an updated comparison of the sensitivity of B --> tau nu and B --> D tau nu decays to charged Higgs effects.

Findings

Leptonic decay B --> tau nu offers strong constraints.

Semileptonic decay B --> D tau nu provides complementary sensitivity.

Updated analysis improves bounds on charged Higgs parameters.

Abstract

We update and compare the capabilities of the purely leptonic mode B --> tau nu and the semileptonic mode B --> D tau nu in the search for a charged Higgs boson.