Search for CP violation using triple product asymmetries in Λ0 b → pK−π+π−, Λ0 b → pK−K+K− and Ξ0 b → pK−K−π+ decays

Abstract

A search for CP and P violation using triple-product asymmetries is performed with Λ 0 b → pK − π + π − , Λ 0 b → pK − K + K − and Ξ 0 b → pK − K − π + decays. The data sample corresponds to integrated luminosities of 1.0 fb −1 and 2.0 fb −1 , recorded with the LHCb detector at centre-of-mass energies of 7 TeV and 8 TeV, respectively. The CP-and Pviolating asymmetries are measured both integrating over all phase space and in specific phase-space regions. No significant deviation from CP or P symmetry is found. The first observation of Λ 0 b → pK − χ c0 (1P)(→ π + π − , K + K −) decay is also reported.

Unification of flavor SU(3) analyses of heavy Hadron weak decays

“…If this is true, we expect that with more data in future, a detailed analysis will determine the decay widths of T b → T 10 V . Then the flavor SU(3) symmetry can be examined, and meanwhile it will also shed light on the C P and T violation in baryonic transitions by using the triplet product asymmetries [68,69]. • Through the results in Table 9, we can find the relations both for decays into T 8 P and T 8 V .…”

Nonleptonic beauty baryon decays and CP asymmetries based on an SU(3) -flavor analysis

“…Starting with the symmetries of the effective Hamiltonian, we relate or neglect reduced SU (3) amplitudes to derive several sum rules relations between amplitudes and relations between CP asymmetries while indicating more general relations that continue to hold when the SU (3) symmetry is no longer exact. This study is crucial for a detailed analysis of the CP asymmetry measurements in bottom baryons decays at the CDF and LHCb in recent times [76][77][78][79][80][81][82][83].…”

Progress and challenges in the study of direct CP violation and $γ$ determinations: summary of CKM 2018 working group V

“…Also, the Λ 0 b → pπ − K + K − decay was studied by LHCb, finding no evidence of P and CP violation [103]. More recently the same technique has been applied to Λ 0 b → pK − π + π − , Λ 0 b → pK + K − K + and Ξ 0 b → pK − K + π − decays, reconstructed using the Run1 data [106]. Again, no evidence of P or CP violation is observed for these decay modes.…”