Study Standard Model and Majorana Neutrino Contributions to $B^{+} \to K^{(*)\pm}\mu^+\mu^{\mp}$

TL;DR

This paper investigates the contributions of the Standard Model and Majorana neutrinos to rare B meson decays, focusing on potential lepton number violation signals and the effects of Majorana neutrinos on decay distributions.

Contribution

It provides a detailed analysis of $B^{+} o K^{(*) u u}$ decays within the Standard Model and extensions, highlighting signatures of Majorana neutrinos in decay distributions and lepton number violation.

Findings

Dilepton invariant mass distributions are predicted.

Angular distributions reveal properties of Majorana-induced interactions.

Potential signals for lepton number violation are identified.

Abstract

Lepton number violation processes can be induced by the Majorana neutrino exchange, which provide evidence for the Majorana nature of neutrinos. In addition to the natural explanation of the small neutrino masses, Type-I seesaw mechanism predicts the existence of Majorana neutrinos. The aim of this work is to study the B meson rare decays $B^{+} \to K^{(*)+}\mu^+\mu^-$ in the standard model and its extensions, and then to investigate the same-sign decay processes $B^{+}\to K^{(*)-}\mu^{+}\mu^+$. The corresponding dilepton invariant mass distributions are predicted. It is found that the dilepton angular distributions illustrate the properties of new interactions induced by the Majorana neutrinos.