B -> tau nu: Opening up the Charged Higgs Parameter Space with R-parity Violation

TL;DR

This paper explores how R-parity violating interactions in supersymmetric models can resolve the discrepancy between the Standard Model prediction and experimental data for the B+ -> tau+ nu decay, opening new parameter space.

Contribution

It demonstrates that introducing R-parity violation relaxes constraints on the charged Higgs parameter space, alleviating fine-tuning issues in supersymmetric models.

Findings

R-parity violation opens up the charged Higgs parameter space.

It reduces the tension between experimental data and theoretical predictions.

Constraints on supersymmetric models are significantly relaxed.

Abstract

The theoretically clean channel B+ -> tau+ nu shows a close to 3sigma discrepancy between the Standard Model prediction and the data. This in turn puts a strong constraint on the parameter space of a two-Higgs doublet model, including R-parity conserving supersymmetry. The constraint is so strong that it almost smells of fine-tuning. We show how the parameter space opens up with the introduction of suitable R-parity violating interactions, and release the tension between data and theory.