CP Asymmetries in Strange Baryon Decays

Abstract

While indirect & direct CP violations (CPV) had been established in the decays of strange & beauty mesons, none have been done for baryons. There are different "roads" for finding CP asymmetries in the decays of strange baryons; they are highly non-trivial ones. The HyperCP Collaboration had probed CPV in the decays of single $\Xi$ & $\Lambda$ [Phys.Rev.Lett 93 (2004) 262001]. We talk about future lessons from $e^{+}{e}^{-}$ collisions at BESIII/BEPCII: probing decays of pairs of strange baryons, namely $\Lambda$, $\Sigma$ & $\Xi$. Realistic goals are to learn about non-perturbative QCD. One can hope to find CPV in the decays of strange baryons; one can also dream to find impact of New Dynamics (ND). We point out that a new important era starts with the BESIII/BEPCII data accumulated by the end of 2018.

final version, slight typos corrected

References in corpus (3)

• Hadronic structure functions in the $e^{+}{e}^{-}\to \bar{\Lambda }\Lambda$ reaction
• Prospects for rare and forbidden hyperon decays at BESIII
• Study of CP violation in ${\Lambda }_c^{+}$ decay

Cited by in corpus (15)

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• Study of CP violation in hyperon decays at Super Charm-Tau Factories with a polarized electron beam
• Testing SU(3) Flavor Symmetry in Semileptonic and Two-body Nonleptonic Decays of Hyperons
• Prospects for CP & P violation in ${\Lambda }_c^{+}$ decay at STCF
• Test of $CP$ Symmetry in Hyperon to Neutron Decays
• The semileptonic baryonic decay $D_s^{+}\to p\bar{p}{e}^{+}{\nu }_e$
• Polarization difference between hyperons and anti-hyperons induced by external magnetic field
• Feasibility study of $CP$ Violation in ${\tau }^{-}\to K_S{\pi }^{-}{\nu }_{\tau }$ decays at Super Tau Charm Facility
• Analysis of angular distribution asymmetries and the associated $CP$ asymmetries in three-body decays of bottom baryons
• Study of the isospin breaking decay $\mathbf{Y}(2175)\to \mathbf{\varphi }{\mathbf{f}}_0(980)\to \mathbf{\varphi \eta }{\mathbf{\pi }}^0$ at BESIII
• Searching for $CP$ violation through two-dimensional angular distributions in four-body decays of bottom and charmed baryons
• Studying Radiative Baryon Decays with the SU(3) Flavor Symmetry
• Study of $a_0^0(980)$-$f_0(980)$ mixing from $a_0(1450)\to a_0^0(980)f_0(500)\to {\pi }^{+}{\pi }^{-}{f}_0(500)$
• Observation of $J/\psi$ decays to $e^{+}{e}^{-}{e}^{+}{e}^{-}$ and $e^{+}{e}^{-}{\mu }^{+}{\mu }^{-}$