Evidence for diffractive charm production inνμFeandν¯μFescattering at the Fermilab Tevatron
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Abstract
We present evidence for the diffractive processes ${\ensuremath{\nu}}_{\ensuremath{\mu}}\mathrm{Fe}\ensuremath{\rightarrow}{\ensuremath{\mu}}^{\ensuremath{-}}{D}_{S}^{+}{(D}_{S}^{*})\mathrm{Fe}$ and ${\overline{\ensuremath{\nu}}}_{\ensuremath{\mu}}\mathrm{Fe}\ensuremath{\rightarrow}{\ensuremath{\mu}}^{+}{D}_{S}^{\ensuremath{-}}{(D}_{S}^{*})\mathrm{Fe}$ using the Fermilab SSQT neutrino beam and the Lab E neutrino detector. The data are consistent with standard model production of the neutrino trident reactions ${\ensuremath{\nu}}_{\ensuremath{\mu}}\mathrm{Fe}\ensuremath{\rightarrow}{\ensuremath{\nu}}_{\ensuremath{\mu}}{\ensuremath{\mu}}^{\ensuremath{-}}{\ensuremath{\mu}}^{+}\mathrm{Fe}$ and ${\overline{\ensuremath{\nu}}}_{\ensuremath{\mu}}\mathrm{Fe}\ensuremath{\rightarrow}{\overline{\ensuremath{\nu}}}_{\ensuremath{\mu}}{\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}}\mathrm{Fe}.$ We see no evidence for neutral-current production of $J/\ensuremath{\psi}$ via either diffractive or deep inelastic scattering mechanisms.