Model Independent Tests for Time Reversal and CP Violations and for CPT Theorem in Λ_b and \barΛ_b Two Body Decays

Abstract

Weak decays of beauty baryons like Λ_b (\barΛ_b) into Λ(\barΛ) and V (J^P = 1^-), where both decay products are polarized, offer interesting opportunities to perform tests of time reversal and CP violations and of CPT invariance. We propose a model independent parametrization of the angular distribution and of the polarization of the final resonances, by means of the spin density matrix. The transverse component of the polarization is sensitive to time reversal violations, moreover CP-and CPT-sensitive observables are defined.

arXiv comment14 pages

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Cited by in corpus (6)

• Measurement of the production fraction times branching fraction f(b --> Λ_b)B(Λ_b --> J/ψΛ)
• Searching for New Physics by means of Relative Phases and Moduli of Decay Amplitudes
• Baryon Polarization, Phases of Amplitudes and Time Reversal Odd Observables
• Polarization in (quasi-)two-body decays and new physics
• Interference Effects, Time Reversal Violation and Search for New Physics in Hadronic Weak Decays
• T-odd Observables in Elastic Scattering, in Deep Inelastic Processes and in Weak Decays