Nuclear effects on R = sigma(L)/sigma(T) in deep-inelastic scattering

HERMES Collaboration

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76 Citations (Web of Science)

Abstract

Cross section ratios for deep-inelastic scattering from N-14 and He-3 with respect to H-2 have been measured by the HERMES experiment at DESY using a 27.5 GeV positron beam. The data cover a range in the Bjorken scaling variable x between 0.013 and 0.65, while the negative squared four-momentum transfer Q(2) Varies from 0.5 to 15 GeV2. The data are compared to measurements performed by NMC, E665, and SLAG on He-4 and C-12, and rue found to be different for x < 0.06 and Q(2) < 1.5 GeV2. The observed difference is attributed to an A-dependence of the ratio R = sigma(L)/sigma(Gamma) of longitudinal to transverse deep-inelastic scattering cross sections at low x and low Q(2). (C) 2000 Elsevier Science B.V. All rights reserved.
Original languageEnglish
Pages (from-to)386-394
Number of pages9
JournalPhysics Letters B
Volume475
Issue number3-4
DOIs
Publication statusPublished - 2 Mar 2000
Externally publishedYes

Keywords

  • STRUCTURE-FUNCTION RATIOS
  • R=SIGMA-L/SIGMA-T
  • ELECTRON-SCATTERING
  • ELECTROMAGNETIC CORRECTIONS
  • MUON SCATTERING
  • Q(2) DEPENDENCE
  • GLOBAL ANALYSIS
  • CROSS-SECTIONS
  • DISTRIBUTIONS
  • DEUTERIUM

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