$D^0\rightarrow \bar p e^+$ Form Factors in LCSR

TL;DR

This paper estimates form factors for a baryon number violating decay of a charmed meson into an antiproton and positron using Light Cone Sum Rules, exploring different proton interpolation currents.

Contribution

It provides the first estimates of the 12 form factors for the BNV decay in SMEFT using LCSR, considering various proton interpolation currents.

Findings

Form factors estimated for BNV decay process

Impact of different proton interpolation currents analyzed

Results aid in understanding BNV decay mechanisms

Abstract

Baryon number is conserved in the Standard Model (SM) of particle physics. Baryon Number Violation (BNV) is one of the criteria to explain the matter anti-matter asymmetry of the universe. Various beyond the SM (BSM) scenarios motivate BNV. In that view, it becomes important to look for various BNV decays. \\ In this work, we consider the BNV decay of heavy charmed meson to anti-proton and positron. This decay proceeds via the dim-6 SM effective field theory (SMEFT) operator and involves 12 independent form factors. We give estimates for these form factors in the framework of Light Cone Sum Rules (LCSR). As the interpolation current for the proton state is not unique, we have considered different forms of proton interpolation current and discuss the effect of the choice of the interpolation current.