Measuring $\mathbf{CP}$ violating phase in beauty baryon decays

TL;DR

This paper proposes a novel method to measure the $CP$ violating phase in $b$-baryon decays by exploiting interference effects from Bose symmetry, aiming to test the Standard Model's predictions and understand baryon asymmetry.

Contribution

It introduces a new approach to measure $CP$ violation in baryon decays using interference from Bose symmetry, which has not been previously explored.

Findings

Proposes a method based on Bose symmetry interference effects.

Provides a framework for measuring $CP$ violation in $b$-baryon decays.

Aims to verify Standard Model predictions regarding baryon $CP$ violation.

Abstract

One of the outstanding problems in physics is to explain the baryon-anti-baryon asymmetry observed in nature. According to the well-known Sakharov criterion for explaining the observed asymmetry, it is essential that $CP$ violation exist. Even though $CP$ violation has been observed in meson decays and is an integral part of the standard model (SM), measurements in meson decays indicate that $CP$ violation in the SM is insufficient to explain the observed baryon-anti-baryon asymmetry. SM predicts the existence of yet to be observed $CP$ violation in baryon decays. A critical test of the SM requires that $CP$ violation be measured in baryon decays as well, in order to verify that it agrees with the measurement using meson decays. In this letter we propose a new method to measure $CP$ violating phase in $b$-baryons, using interference arising implicitly due to Bose symmetry considerations of the decaying amplitudes.