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Study of $\Lambda_b\to\Lambda\nu\bar{\nu}$ with Polarized Baryons
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abstract
We investigate the decay of $\Lambda_b\to\Lambda\nu\bar{\nu}$ with the polarized baryons of $\Lambda_b$ and $\Lambda$. With the most general hadronic form factors, we first study the decay branching ratio and then derive the longitudinal, normal and transverse polarizations of $\Lambda$ in terms of the spin unit vectors of $\Lambda_b$ and $\Lambda $ and the momentum of $\Lambda $. A polarization of $\Lambda_b$ is also discussed.
Forward citations
Cited by 3 Pith papers
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New Strategies for New Physics Search with $\Lambda_b \to \Lambda \nu \bar\nu$ Decays
For longitudinally polarized Lambda_b at future Z-pole machines, Lambda_b -> Lambda nu nubar has a forward-backward asymmetry that is independent of new physics at its zero crossing and complements the branching ratio...
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Semileptonic neutral current decays of $\Xi_b$ with dileptons or dineutrinos in the final state
Perturbative QCD calculations find that branching fractions for Ξ_b to Ξ lepton-pair decays lie within LHCb reach and that angular observables plus a specific ratio can constrain Wilson coefficients and extract |V_td/...
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$\Lambda_b \to \Lambda^{(\ast)}\nu\bar{\nu}$ decays and the recent Belle-II $B^+\to K^+\nu\bar{\nu}$ data
Belle-II's B+ -> K+ nu nubar excess, if due to new physics, constrains the branching ratios and angular observables of Lambda_b -> Lambda(*) nu nubar decays, with the hadronic forward-backward asymmetry the best discr...
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