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.
- Received 13 December 1976
DOI:https://doi.org/10.1103/PhysRevD.17.709
©1978 American Physical Society