The B -> pi tau nu decay in the context of the 2HDM type II

TL;DR

This paper investigates the B -> pi tau nu decay within the 2HDM type II framework, providing predictions and constraints based on experimental data, and discusses alternative variables for enhanced sensitivity to scalar contributions.

Contribution

It offers new predictions for decay ratios in 2HDM type II and proposes an alternative variable to improve detection sensitivity of scalar mediator effects.

Findings

Predictions for semileptonic branching fraction ratios

Constraints on MSSM parameters from Belle data

Discussion of an alternative variable for increased sensitivity

Abstract

In this manuscript the B -> pi tau nu decay is investigated in the context of the 2HDM type II extension of the SM. In particular, predictions for the ratio of semileptonic branching fractions from l = tau and l = electron, muon are produced and an exclusion based on the MSSM parameters tan beta and mH+ from a preliminary Belle measurement are reported. An alternative variable to the ratio of branching fractions that could offer increased sensitivity is discussed that could result in increased sensitivity to rule out contributions from additional scalar mediators.