${\Lambda }_b$ Decays into $\Lambda$-Vector

Abstract

A complete study of the angular distributions of the processes, ${\Lambda }_b\to \Lambda V(1^{-})$, with $\Lambda \to p{\pi }^{-}$ and $V(J/\Psi )\to {\ell }^{+}{\ell }^{-}$ or $V({\rho }^0,\omega )\to {\pi }^{+}{\pi }^{-},$ is performed. Emphasis is put on the initial ${\Lambda }_b$ polarization produced in the proton-proton collisions. The polarization density-matrices as well as angular distributions are derived and help to construct T-odd observables which allow us to perform tests of both Time-Reversal and CP violation.

10 pages, 2 figures

References in corpus (2)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• Double-lepton polarization asymmetries in Lambda_b -> Lambda l^+ l^- decay

Cited by in corpus (25)

• Measurements of the Lambda_b0 -> J/psi Lambda decay amplitudes and the Lambda_b0 polarisation in pp collisions at sqrt(s) = 7 TeV
• Helicity Analysis of Semileptonic Hyperon Decays Including Lepton Mass Effects
• Nonleptonic two-body decays of single heavy baryons ${\Lambda }_Q$, ${\Xi }_Q$, and ${\Omega }_Q$ $(Q=b,c)$ induced by $W$ emission in the covariant confined quark model
• Lambda_b -> Lambda l+ l- form factors and differential branching fraction from lattice QCD
• Measurement of the parity-violating asymmetry parameter alpha_b and the helicity amplitudes for the decay Lambda_b->J/psi+Lambda with the ATLAS detector
• Measurement of the ${\Lambda }_b$ polarization and angular parameters in ${\Lambda }_b\to J/\psi \Lambda$ decays from pp collisions at $\sqrt{s}=$ 7 and 8 TeV
• Heavy baryons as polarimeters at colliders
• Measurement of the ${\Lambda }_b^0\to J/\psi \Lambda$ angular distribution and the ${\Lambda }_b^0$ polarisation in $pp$ collisions
• Photon helicity in Lambda_b --> p K gamma decays
• An angular distribution analysis of ${\Lambda }_b$ decays
• Time-reversal asymmetries and angular distributions in ${\Lambda }_b\to \Lambda V$
• Testing CP and Time Reversal Symmetries with ${\Lambda }_b\to \Lambda V(1-)$ Decays
• Estimates of exchange topological contributions and $CP$-violating observables in ${\Lambda }_b\to \Lambda \varphi$ decay
• Charmonium decays of beauty baryons in the perturbative QCD approach
• Note on new interesting baryon channels to measure the photon polarization in b -> s gamma
• Sizable Time-reversal violating effects in bottom baryon decays
• Model Independent Tests for Time Reversal and CP Violations and for CPT Theorem in Λ_b and \barΛ_b Two Body Decays
• Final-state rescattering mechanism in bottom-baryon decays
• Asymmetry in ${\Lambda }_b$ and ${\bar{\Lambda }}_b$ production
• Searching for New Physics by means of Relative Phases and Moduli of Decay Amplitudes
• Baryon Polarization, Phases of Amplitudes and Time Reversal Odd Observables
• Topological amplitudes of bottom baryon decays in the $SU(3{)}_F$ limit
• Interference Effects, Time Reversal Violation and Search for New Physics in Hadronic Weak Decays
• Parametrizations of the Spin Density Matrix
• T-odd Observables in Elastic Scattering, in Deep Inelastic Processes and in Weak Decays