Showing papers by "S. R. Mishra published in 1996"
TL;DR: In this article, the authors presented a statistical separation of the CCFR detector at Fermilab, which is the most stringent limit to date for the region with the largest number of charged current interactions.
Abstract: Limits on ${\ensuremath{
u}}_{\ensuremath{\mu}}({\overline{\ensuremath{
u}}}_{\ensuremath{\mu}})\ensuremath{\rightarrow}{\ensuremath{
u}}_{e}({\overline{\ensuremath{
u}}}_{e})$ oscillations based on a statistical separation of ${\ensuremath{
u}}_{e}N$ charged current interactions in the CCFR detector at Fermilab are presented. Neutrino energies range from 30 to 600 GeV with a mean of 140 GeV, and ${\ensuremath{
u}}_{\ensuremath{\mu}}$ flight lengths vary from 0.9 to 1.4 km. The result excludes oscillations in the region with ${sin}^{2}2\ensuremath{\alpha}g1.8\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}3}$ for large $\ensuremath{\Delta}{m}^{2}(g1000{\mathrm{eV}}^{2})$ and $\ensuremath{\Delta}{m}^{2}g1.6{\mathrm{eV}}^{2}$ for ${sin}^{2}2\ensuremath{\alpha}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}1$. This result is the most stringent limit to date for $\ensuremath{\Delta}{m}^{2}g25{\mathrm{eV}}^{2}$ and it excludes the high $\ensuremath{\Delta}{m}^{2}$ oscillation region favored by the LSND experiment. The ${\ensuremath{
u}}_{\ensuremath{\mu}}$-to- ${\ensuremath{
u}}_{e}$ cross-section ratio was measured as a test of ${\ensuremath{
u}}_{\ensuremath{\mu}}({\overline{\ensuremath{
u}}}_{\ensuremath{\mu}})\ensuremath{\leftrightarrow}{\ensuremath{
u}}_{e}({\overline{\ensuremath{
u}}}_{e})$ universality to be $1.026\ifmmode\pm\else\textpm\fi{}0.025(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}0.049(\mathrm{syst})$.
57 citations
TL;DR: In this paper, the first measurements of R in the region x < 0.1 were obtained using the CCFR neutrino detector at Fermilab and the results were compared with a QCD-based fit to previous data.
Abstract: Measurements of neutrino - nucleon and antineutrino - nucleon differential cross sections using the CCFR neutrino detector at Fermilab have been used to extract preliminary values of in the kinematic region 0.01 < x < 0.6 and . The new data provide the first measurements of R in the region x < 0.1. The x and dependence of R is compared with a QCD-based fit to previous data. The QCD fit, which provides an estimate of R in the small-x region where R has not been previously measured, is in good agreement with the new CCFR data.
7 citations