${\Lambda }_c$ semileptonic decays

Abstract

Motivated by the recent experimental progress in the ${\Lambda }_c$ decay that contains a neutron in the final state, we analyze the semileptonic decay ${\Lambda }_c\to n\ell {\nu }_{\ell }$ in the framework of QCD sum rules. The transition form factors are analytically computed using three-point correlation functions and the Cutkosky cutting rules, which can be extrapolated into the physical region by employing the $z$-series parametrization. The branching fractions of ${\Lambda }_c\to n{e}^{+}{\nu }_e$ and ${\Lambda }_c\to n{\mu }^{+}{\nu }_{\mu }$ are estimated to be $(0.281\pm 0.056)\%$ and $(0.275\pm 0.055)\%$, respectively. Furthermore, we calculate as well the relevant decay asymmetry observables sensitive to new physics beyond the standard model. The numerical results of semileptonic decays ${\Lambda }_c\to \Lambda \ell {\nu }_{\ell }$ are also given and confronted to the latest experimental data.

18 pages, 5 figures, 3 tables

References in corpus (10)

• Nucleon Form Factors in QCD
• ${\Lambda }_c\to \Lambda {\ell }^{+}{\nu }_{\ell }$ form factors and decay rates from lattice QCD with physical quark masses
• Measurement of the Absolute Branching Fraction for ${\Lambda }_c^{+}\to \Lambda {\mu }^{+}{\nu }_{\mu }$
• Heavy-to-light semileptonic decays of Lambda_b and Lambda_c baryons in the covariant confined quark model
• Semileptonic decays of anti-triplet charmed baryons
• Extrapolation and unitarity bounds for the $B\to \pi$ form factor
• Semileptonic decays of ${\Lambda }_c$ baryons in the relativistic quark model
• Measurement of the $D^0\to {\pi }^{-}{e}^{+}{\nu }_e$ differential decay branching fraction as a function of $q^2$ and study of form factor parameterizations
• Study of the Semileptonic Decay ${\Lambda }_c^{+}\to \Lambda e^{+}{\nu }_e$
• Observation of the Singly Cabibbo-Suppressed Decay ${\Lambda }_c^{+}\to n{\pi }^{+}$

Cited by in corpus (12)

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• Systematic analysis of the form factors of $B_c\to {\eta }_c$, $J/\psi$ and corresponding weak decays
• Rare ${\Lambda }_c$ decays and new physics effects
• Analysis of the electromagnetic form factors and the radiative decays of the vector heavy-light mesons
• Analysis of the strong vertices ${\Lambda }_c{D}^{(\ast )}{N}^{\ast }(1535)$ and ${\Lambda }_b{B}^{(\ast )}{N}^{\ast }(1535)$ in QCD sum rules
• Spectrum of Light Hexaquark States in Triquark-antitriquark Configuration
• Analysis of the semileptonic decays of ${\Xi }_{cc}$ and ${\Omega }_{cc}$ baryons in QCD sum rules
• Fully strange tetraquark states via QCD sum rules
• Baryons and baryoniums in the perspective of QCD sum rules
• Strange pentaquark molecules in QCD sum rules
• Analysis of the semileptonic decays ${\Sigma }_b\to {\Sigma }_{c}l{\bar{\nu }}_l$, ${\Xi }_b^{\prime }\to {\Xi }_c^{\prime }l{\bar{\nu }}_l$ and ${\Omega }_b\to {\Omega }_{c}l{\bar{\nu }}_l$ in QCD sum rules