Measurements of R = sigma(L)/sigma(T) for 0.03 < x < 0.1 and fit to world data

Authors
Abe, K Akagi, T Anthony, PL Antonov, R Arnold, RG Averett, T Band, HR Bauer, JM Borel, H Bosted, PE Breton, V Button-Shafer, J Chen, JP Chupp, TE Clendenin, J Comptour, C Coulter, KP Court, G Crabb, D Daoudi, M Day, D Dietrich, FS Dunne, J Dutz, H Erbacher, R Fellbaum, J Feltham, A Fonvieille, H Frlez, E Garvey, D Gearhart, R Gomez, J Grenier, P Griffioen, KA Hoibraten, S Hughes, EW Hyde-Wright, C Johnson, JR Kawall, D Klein, A Kuhn, SE Kuriki, M Lindgren, R Liu, TJ Lombard-Nelsen, RM Marroncle, J Maruyama, T Maruyama, XK McCarthy, J Meyer, W Meziani, ZE Minehart, R Mitchell, J Morgenstern, J Petratos, GG Pitthan, R Pocanic, D Prepost, R Prescott, C Raines, P Raue, B Reyna, D Rijllart, A Roblin, Y Rochester, LS Rock, SE Rondon, OA Sick, I Smith, LC Smith, TB Spengos, M Staley, F Steiner, P St Lorant, S Stuart, LM Suekane, F Szalata, ZM Tang, H Terrien, Y Usher, T Walz, D Wesselmann, F White, JL Witte, K Young, CC Youngman, B Yuta, H Zapalac, G Zihlmann, B Zimmermann, D
Citation
K. Abe et al., Measurements of R = sigma(L)/sigma(T) for 0.03 < x < 0.1 and fit to world data, PHYS LETT B, 452(1-2), 1999, pp. 194-200
Citations number
22
Categorie Soggetti
Physics
Journal title
PHYSICS LETTERS B
ISSN journal
03702693 → ACNP
Volume
452
Issue
1-2
Year of publication
1999
Pages
194 - 200
Database
ISI
SICI code
0370-2693(19990415)452:1-2<194:MOR=SF>2.0.ZU;2-V
Abstract
Measurements were made at SLAG of the cross section for scattering 29 GeV e lectrons from carbon at a laboratory angle of 4.5 degrees, corresponding to 0.03 < x < 0.1 and 1.3 < Q(2) < 2.7 GeV2. Values of R = sigma(L)/sigma(T), were extracted in this kinematic range by comparing these data to cross se ctions measured at a higher beam energy by the NMC collaboration. The resul ts are in reasonable agreement with pQCD calculations and with extrapolatio ns of the R1990 parameterization of previous data. A new fit is made includ ing these data and other recent results. (C) 1999 Published by Elsevier Sci ence B.V. All rights reserved.