Weak production of strange and charm ground-state baryons in nuclei

Abstract

We present results for the quasi-elastic weak production of $\Lambda$ and $\Sigma$ hyperons induced by $\bar{\nu }$ scattering off nuclei, in the kinematical region of interest for accelerator neutrino experiments. We employ realistic hole spectral functions and we describe the propagation of the hyperons in the nuclear medium by means of a Monte Carlo cascade. The latter strongly modifies the kinematics and the relative production rates of the hyperons, leading to a non-vanishing ${\Sigma }^{+}$ cross section, to a sizable enhancement of the $\Lambda$ production and to a drastic reduction of the ${\Sigma }^0$ and ${\Sigma }^{-}$ distributions. We also compute the quasi-elastic weak ${\Lambda }_c$ production cross section, paying special attention to estimate the uncertainties induced by the model dependence of the vacuum $n\to {\Lambda }_c$ weak matrix element. In this regard, the recent BESIII measurements of the branching ratios of ${\Lambda }_c\to \Lambda l^{+}{\nu }_l$ ($l=e,\mu$) are used to benchmark the available theoretical predictions.

arXiv comment18 pages, 10 figures

References in corpus (24)

• Big-Bang Nucleosynthesis
• The GENIE Neutrino Monte Carlo Generator
• Heavy Baryons in a Quark Model
• Domain wall QCD with physical quark masses
• Model-independent description of $B\to \pi l\nu$ decays and a determination of $|V_{ub}|$
• Inclusive Quasi-Elastic Charged-Current Neutrino-Nucleus Reactions
• Continuum Limit Physics from 2+1 Flavor Domain Wall QCD
• Heavy Baryon Transitions in a Relativistic Three-Quark Model
• Relativistic constituent quark model with infrared confinement
• Improving the accuracy of neutrino energy reconstruction in charged-current quasielastic scattering off nuclear targets
• Rare baryon decays Lambda_b -> Lambda l+ l- (l=e, mu, tau) and Lambda_b -> Lambda gamma : Differential and total rates, lepton- and hadron-side forward-backward asymmetries
• Measurement of the Branching Fraction Br(Lambda_c+ -> p K- pi+)
• Measurement of the absolute branching fraction for ${\Lambda }_c^{+}\to \Lambda e^{+}{\nu }_e$
• ${\Lambda }_c\to \Lambda {\ell }^{+}{\nu }_{\ell }$ form factors and decay rates from lattice QCD with physical quark masses
• ${\Lambda }_c\to N$ form factors from lattice QCD and phenomenology of ${\Lambda }_c\to n{\ell }^{+}{\nu }_{\ell }$ and ${\Lambda }_c\to p{\mu }^{+}{\mu }^{-}$ decays
• Simulations from a new neutrino event generator
• 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
• In medium dispersion relation effects in nuclear inclusive reactions at intermediate and low energies
• Semileptonic decays ${\Lambda }_c^{+}\to \Lambda {\ell }^{+}{\nu }_{\ell }(\ell =e,\mu )$ in the covariant quark model and comparison with the new absolute branching fraction measurements of Belle and BESIII
• Semileptonic decays of ${\Lambda }_c$ baryons in the relativistic quark model
• Weak Quasi-elastic Production of Hyperons
• ${\Lambda }_c$ Semileptonic Decays in a Quark Model
• Scaling within the Spectral Function approach

Cited by in corpus (6)

• Polarization of tau in quasielastic (anti)neutrino scattering: the role of spectral functions
• Summary of Workshop on Common Neutrino Event Generator Tools
• Searching and identifying leptoquarks through low-energy polarized scattering processes $e^{-}p\to e^{-}{\Lambda }_c$
• Weak production of strange $\Xi$ baryons off the nucleon
• Inclusive quasielastic (anti-)neutrino nucleus scattering within the Standard Model and beyond
• Second Class Currents, Axial Mass and Nuclear Effects in Hyperon Production