Semileptonic ${\Lambda }_{b,c}$ to Nucleon Transitions in Full QCD at Light Cone

Abstract

The tree level semileptonic ${\Lambda }_b\to pl\nu$ and ${\Lambda }_c\to nl\nu$ transitions are investigated using the light cone QCD sum rules approach in full theory. The spin--1/2, ${\Lambda }_Q$ baryon with $Q=b$ or $c$, is considered by the most general form of its interpolating current. The time ordering product of the initial and transition currents is expanded in terms of the nucleon distribution amplitudes with different twists. Considering two sets of independent input parameters entering to the nucleon wave functions, namely, QCD sum rules and Lattice QCD parameters, the related form factors and their heavy quark effective theory limits are calculated and compared with the existing predictions of other approaches. It is shown that our results satisfy the heavy quark symmetry relations for lattice input parameters and b case exactly and the maximum violation is for charm case and QCD sum rules input parameters. The obtained form factors are used to compute the transition rates both in full theory and heavy quark effective theory. A comparison of the results on decay rate of ${\Lambda }_b\to pl\nu$ with those predicted by other phenomenological methods or the same method in heavy quark effective theory with different interpolating current and distribution amplitudes of the ${\Lambda }_b$ is also presented.

18 Pages and 16 Tables

References in corpus (9)

• Nucleon Form Factors in QCD
• Direct observation of the strange b baryon Xi_b^{-}
• Observation of the doubly strange b baryon Omega_b-
• Semileptonic decays of heavy baryons in the relativistic quark model
• ${\Lambda }_b\to p,\Lambda$ transition form factors from QCD light-cone sum rules
• Nucleon distribution amplitudes from lattice QCD
• Semileptonic Decays of Heavy Omega Baryons in a Quark Model
• ${\Sigma }_Q{\Lambda }_Q\pi$ Coupling Constant in Light Cone QCD Sum Rules
• Tree Level Semileptonic ${\Sigma }_b$ to Nucleon Decay in Light Cone QCD Sum Rules

Cited by in corpus (24)

• ${\Lambda }_b\to p{\ell }^{-}{\bar{\nu }}_{\ell }$ and ${\Lambda }_b\to {\Lambda }_c{\ell }^{-}{\bar{\nu }}_{\ell }$ form factors from lattice QCD with relativistic heavy quarks
• Form Factors and Strong Couplings of Heavy Baryons from QCD Light-Cone Sum Rules
• Charmed Baryon Physics Circa 2021
• Analysis of the $Λ_{b}\rar Λ\ell^+\ell^- $ decay in QCD
• Singly Cabibbo-suppressed hadronic decays of ${\Lambda }_c^{+}$
• ${\Lambda }_c\to N$ form factors from lattice QCD and phenomenology of ${\Lambda }_c\to n{\ell }^{+}{\nu }_{\ell }$ and ${\Lambda }_c\to p{\mu }^{+}{\mu }^{-}$ decays
• $b\to c\tau {\nu }_{\tau }$ Decays: A Catalogue to Compare, Constrain, and Correlate New Physics Effects
• Heavy-to-light semileptonic decays of Lambda_b and Lambda_c baryons in the covariant confined quark model
• Light cone QCD sum rules study of the semileptonic heavy ${\Xi }_Q$ and ${\Xi }_Q^{\prime }$ transitions to $\Xi$ and $\Sigma$ baryons
• Semileptonic decays of ${\Lambda }_c$ baryons in the relativistic quark model
• Semileptonic ${\Lambda }_b\to {\Lambda }_c\ell {\bar{\nu }}_{\ell }$ Transition in Full QCD
• Study of the Semileptonic Decay ${\Lambda }_c^{+}\to \Lambda e^{+}{\nu }_e$
• Topological tensor invariants and the current algebra approach: Analysis of 196 nonleptonic two-body decays of single and double charm baryons -- a review
• Semileptonic weak decays of anti-triplet charmed baryons in the light-front formalism
• ${\Lambda }_c$ semileptonic decays
• The strong ${\Lambda }_{b}NB$ and ${\Lambda }_{c}ND$ vertices
• ${\Lambda }_b\to p{l}^{-}\bar{\nu }$ form factors from lattice QCD with static b quarks
• Rare ${\Lambda }_c\to p{\ell }^{+}{\ell }^{-}$ decay in the relativistic quark model
• Analysis of the semileptonic decay Λ_c->ne^+ν_e
• Method of Studying ${\Lambda }_b^0$ decays with one missing particle
• Semileptonic transition of ${\Sigma }_b$ to $\Sigma$ in Light Cone QCD Sum Rules
• Recent Developments on the CKM Matrix
• The decays ${\Lambda }_{b,c}\to N^{\ast }l\nu$ in QCD
• Obtaining |V(ub)| exclusively: a theoretical perspective