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Extraction of R=sigma_L/sigma_T from CCFR Neutrino and Antinetrino Differential Cross Sections

A. Bodek·T. Adams·A. Alton·C. G. Arroyo·S. Avvakumov·L. deBarbaro·P. deBarbaro·A. O. Bazarko·R. H. Bernstein·T. Bolton·J. Brau·D. Buchholz
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Abstract

We report on the extraction of R=sigam_L/sigma_T from CCFR neutrino and antineutrino-Iron differential cross sections. R as measured in neutrno scattering is in agreement with $R$ as measured in muon and electron scattering. All data on R for Q2 > 1 GeV2 are in agreement with a NNLO QCD calculation which uses NNLO PDFs and includes target mass effects. We report on the first measurements of R in the low x and Q2 < 1 GeV2 region (where an anomalous large rise in R for nuclear targets has been observed by the HERMES collaboration).

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A. Bodek, T. Adams, A. Alton, C. G. Arroyo, S. Avvakumov, L. deBarbaro, P. deBarbaro, A. O. Bazarko, R. H. Bernstein, T. Bolton, J. Brau, D. Buchholz. 2001-05-22. Extraction of R=sigma_L/sigma_T from CCFR Neutrino and Antinetrino Differential Cross Sections. https://arxiv.org/abs/hep-ex/0105067

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