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Title: Weak Production of Strange and Charmed Ground-State Baryons in Nuclei

Abstract

We present results for the quasielastic weak production of Λ and Σ hyperons induced by ν¯ 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 nonvanishing Σ+ cross section, to a sizable enhancement of the Λ production and to a drastic reduction of the Σ0 and Σ− distributions. We also compute the quasielastic weak Λc production cross section, paying special attention to estimate the uncertainties induced by the model dependence of the vacuum n→Λc weak matrix element. In this regard, the recent BESIII measurements of the branching ratios of Λc→Λl+νl (l=e,μ) are used to benchmark the available theoretical predictions.

Authors:
 [1];  [2];  [3];  [1]
  1. Valencia U., IFIC
  2. Fermilab
  3. TIFPA-INFN, Trento
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1571814
Report Number(s):
arXiv:1901.10192; FERMILAB-PUB-19-274-T
oai:inspirehep.net:1717483
DOE Contract Number:  
AC02-07CH11359
Resource Type:
Journal Article
Journal Name:
Phys.Rev.
Additional Journal Information:
Journal Volume: C99; Journal Issue: 6
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Sobczyk, J. E., Rocco, N., Lovato, A., and Nieves, J. Weak Production of Strange and Charmed Ground-State Baryons in Nuclei. United States: N. p., 2019. Web. doi:10.1103/PhysRevC.99.065503.
Sobczyk, J. E., Rocco, N., Lovato, A., & Nieves, J. Weak Production of Strange and Charmed Ground-State Baryons in Nuclei. United States. doi:10.1103/PhysRevC.99.065503.
Sobczyk, J. E., Rocco, N., Lovato, A., and Nieves, J. Wed . "Weak Production of Strange and Charmed Ground-State Baryons in Nuclei". United States. doi:10.1103/PhysRevC.99.065503. https://www.osti.gov/servlets/purl/1571814.
@article{osti_1571814,
title = {Weak Production of Strange and Charmed Ground-State Baryons in Nuclei},
author = {Sobczyk, J. E. and Rocco, N. and Lovato, A. and Nieves, J.},
abstractNote = {We present results for the quasielastic weak production of Λ and Σ hyperons induced by ν¯ 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 nonvanishing Σ+ cross section, to a sizable enhancement of the Λ production and to a drastic reduction of the Σ0 and Σ− distributions. We also compute the quasielastic weak Λc production cross section, paying special attention to estimate the uncertainties induced by the model dependence of the vacuum n→Λc weak matrix element. In this regard, the recent BESIII measurements of the branching ratios of Λc→Λl+νl (l=e,μ) are used to benchmark the available theoretical predictions.},
doi = {10.1103/PhysRevC.99.065503},
journal = {Phys.Rev.},
number = 6,
volume = C99,
place = {United States},
year = {2019},
month = {6}
}

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