Inclusive semileptonic ${\Lambda }_b$ decays in the Standard Model and beyond

Abstract

Inclusive semileptonic decays of beauty baryons are studied using the heavy quark expansion to $\mathcal{O}(1/m_b^3)$, at leading order in ${\alpha }_s$. The case of a polarized decaying baryon is examined, with reference to ${\Lambda }_b$. An extension of the Standard Model effective Hamiltonian inducing $b\to U\ell {\bar{\nu }}_{\ell }$ transitions ($U=u,c$ and $\ell =e,\mu ,\tau$) is considered, which comprises the full set of D=6 semileptonic operators with left-handed neutrinos. The effects of the new operators in several observables are described.

50 pages, 12 figures. Corrected eq. (C.5)

References in corpus (18)

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Cited by in corpus (16)

• Semitauonic $b$-hadron decays: A lepton flavor universality laboratory
• Lattice QCD study of inclusive semileptonic decays of heavy mesons
• The role of right-handed neutrinos in $b\to c\tau (\pi {\nu }_{\tau },\rho {\nu }_{\tau },\mu {\bar{\nu }}_{\mu }{\nu }_{\tau }){\bar{\nu }}_{\tau }$ from visible final-state kinematics
• Role of $B_c^{+}\to B_{s,d}^{(\ast )}\bar{\ell }{\nu }_{\ell }$ in the Standard Model and in the search for BSM signals
• New physics and the tau polarization vector in $b\to c\tau {\bar{\nu }}_{\tau }$ decays
• NLO QCD corrections to inclusive semitauonic weak decays of heavy hadrons up to $1/m_b^3$
• Relations among $B_c\to J/\psi ,{\eta }_c$ form factors
• Quark-hadron duality at work: lifetimes of bottom baryons
• Time-reversal asymmetries in ${\Lambda }_b$ semileptonic decays
• Inclusive semileptonic $B_s^0$ meson decays at the LHC via a sum-of-exclusive modes technique: possibilities and prospects
• Exploring the role of new physics in $b\to u\tau \bar{\nu }$ decays
• Electromagnetic and weak decay of singly Heavy Baryons (Qqq)
• $O({\alpha }_s)$ perturbative and nonperturbative corrections to polarized semileptonic ${\Lambda }_b$ decay distributions
• The Angular Observables of ${\Lambda }_b\to {\Lambda }_c(\to {\Lambda }^0{\pi }^{+}){\tau }^{-}(\to {\pi }^{-}{\nu }_{\tau }){\bar{\nu }}_{\tau }$ within the Paradigm of FCCC Anomalies
• Standard Model predictions for Lepton Flavour Universality ratios of inclusive semileptonic $B$ decays
• Probing New Physics with heavy hadron decays