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

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.

5 pages 4 figures; Acknowledgement extended to honor the memory of Sheldon Stone; Accepted for publication in Phys. Rev. Lett

References in corpus (7)

• Leptogenesis
• Measurements of Direct CP Violating Asymmetries in Charmless Decays of Strange Bottom Mesons and Bottom Baryons
• Measurements of Direct CP-Violating Asymmetries in Charmless Decays of Bottom Baryons
• Non-leptonic beauty baryon decays and $CP$-asymmetries based on $SU(3)$-Flavor analysis
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• Patterns of New Physics in B Decays

Cited by in corpus (5)

• Analysis of angular distribution asymmetries and the associated $CP$ asymmetries in three-body decays of bottom baryons
• Study of the resonance contributions in the ${\Xi }_b^{-}\to p{K}^{-}{K}^{-}$ decay
• Four-body baryonic $B\to {\mathbf{B}}_1{\bar{\mathbf{B}}}_1^{\prime }{\mathbf{B}}_2{\bar{\mathbf{B}}}_2^{\prime }$ decays
• Charmful two-body ${\Omega }_b$ decays in the light-front quark model
• $CP$-violation and $U$-spin symmetry in four-body bottom baryon decays