A Measurement of $R ={sigma_L}{sigma_T}$ in Deep Inelastic Neutrino-Nucleon Scattering at t.pdf
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UR-1460, ER-40685-889
UK PHENOMENOLOGY WORKSHOP
A Workshop on HERA Physics
17th to 23rd September, 1995
A Measurement of R = σL/σT in Deep Inelastic
Neutrino-Nucleon Scattering at the Tevatron
U K Yang, P Auchincloss, P de Barbaro, A Bodek, H Budd, D A Harris,
W K Sakumoto?; W C Lefmann, R Steiner?; M J Oreglia, B A Schumm§;
R A Johnson, M Nussbaum, L Perera, M Vakili‖; C G Arroyo,
A O Bazarko, J Conrad, J H Kim, B J King, S Koutsoliotas, C McNulty,
S R Mishra, Z Quintas, A Romosan, F J Sciulli, W G Seligman,
M H Shaevitz, Spentzouris, E G Stern?; R H Bernstein, G Koizumi,
M J Lamm, Marsh, K S McFarland+; T Bolton, W B Lowery, D Naples?;
R B Drucker?; T Kinnel, W H Smith?; and P Nienaber#
(Presented by U K Yang for the CCFR/NuTeV Collaboration)
? University of Rochester, Rochester, NY 14627 USA
? Adelphi University, Garden City, NY 11530 USA
§ University of Chicago, Chicago, IL 60637 USA
‖ University of Cincinnati, Cincinnati, OH 45221 USA
? Columbia University, New York, NY 10027 USA
+Fermi National Accelerator Laboratory, Batavia, IL 60510 USA
? Kansas State University, Manhattan, KS 66506 USA
? University of Oregon, Eugene, OR 97403 USA
? University of Wisconsin, Madison, WI 53706 USA
# Xavier University, Cincinnati, OH 45207 USA
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 R = σL/σT in the kinematic region 0.01 x 0.6, and
4 Q2 300 GeV2. The new data provide the first measurements of R in the
x 0.1 region. The x and Q2 dependence of R is compared with a QCD based fit to
previous data. The QCD fit, which provides an estimate of R in small x region where
R has not been previously measured, is in good agreement with the new CCFR data.
(To be published in Jou. Phys. G)
1. Introduction
The ratio R = σL/σT of the longitudinal and transverse absorption cross
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