Quark-model calculation of charmed-baryon production by neutrinos
- 1 February 1978
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 17 (3), 709-724
- https://doi.org/10.1103/physrevd.17.709
Abstract
We study the neutrino production of 25 low-lying charmed-baryon resonances in the four-flavor quark model. The mass difference of ordinary and charmed quarks is explicitly taken into account. The quark model is used to determine the spectrum of the charmed-baryon resonances and the values of the weak-current transition matrix elements. These transition matrix elements are then continued to spacelike values by a generalized meson-dominance ansatz for a set of suitably chosen invariant form factors. We find that the production of the states , , and is dominant, with the produced most copiously. For the charm states are dominant. We discuss the sensitivity of our results to various input assumptions, e.g., the ratio of charm-quark mass to ordinary-quark mass. We give differential cross sections, total cross sections, and energy-integrated total cross sections using experimental neutrino fluxes. We conclude that the charmed-baryon production rate can be as large as 3-4% of the total neutrino cross section in a region extending from charm threshold to GeV.
Keywords
This publication has 31 references indexed in Scilit:
- Weak production of charmed baryon resonancesPhysics Letters B, 1977
- Charmed-baryon interpretation ofΛ¯π−π−π+andΛ¯π−π−π+π±peaksPhysical Review D, 1977
- Observation of a Narrow Antibaryon State at 2.26Physical Review Letters, 1976
- Observation of associated Kos-electron production in e+e− annihilationPhysics Letters B, 1976
- Observation of a Narrow Charged State at 1876 MeV/Decaying to an Exotic Combination ofPhysical Review Letters, 1976
- Jψ and ψ′ decays into two hadronsPhysics Letters B, 1976
- Observation in Annihilation of a Narrow State at 1865 MeV/ Decaying to andPhysical Review Letters, 1976
- Estimates of charm production in exclusive neutrino reactionsPhysical Review D, 1976
- Evidence forCurrents or Charmed-Baryon Production by NeutrinosPhysical Review Letters, 1975
- Weak Interactions with Lepton-Hadron SymmetryPhysical Review D, 1970