期刊
PHYSICAL REVIEW C
卷 99, 期 6, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevC.99.065503
关键词
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资金
- Spanish Ministerio de Ciencia, Innovacion y Universidades
- European FEDER funds [FIS2017-84038-C2-1-P, SEV-2014-0398]
- U.S. DOE, Office of Science, Office of Nuclear Physics [DE-AC02-06CH11357]
- Fermi Research Alliance, LLC
- U.S. Department of Energy, Office of Science, Office of High Energy Physics [DE-AC02-07CH11359]
We present results for the quasielastic weak production of Delta and Sigma hyperons induced by (nu) over bar. 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 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 quasielastic weak Lambda(c) production cross section, paying special attention to estimate the uncertainties induced by the model dependence of the vacuum n -> Lambda(c) weak matrix element. In this regard, the recent BESIII measurements of the branching ratios of Lambda(c) -> Lambda l(+)nu(l) (l = e, mu) are used to benchmark the available theoretical predictions.
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