Observation of a coherence length effect in exclusive rho(0) electroproduction

HERMES Collaboration

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60 Citations (Web of Science)

Abstract

Exclusive incoherent electroproduction of the rho(0)(770) meson from H-1, H-2, He-3, and N-14 targets has been studied by the HERMES experiment at squared four-momentum transfer Q(2) > 0.4 GeV2 and positron energy loss nu from 9 to 20 GeV. The ratio of the N-14 to H-1 cross sections per nucleon, known as the nuclear transparency, was found to decrease with increasing coherence length of quark-antiquark fluctuations of the virtual photon. The data provide clear evidence of the interaction of the quark-antiquark fluctuations with the nuclear medium. [S0031-9007(99)08858-4].
Original languageEnglish
Pages (from-to)3025-3029
Number of pages5
JournalPhysical Review Letters
Volume82
Issue number15
DOIs
Publication statusPublished - 12 Apr 1999
Externally publishedYes

Keywords

  • VECTOR-MESONS
  • COLOR TRANSPARENCY
  • NUCLEAR TRANSPARENCY
  • SCATTERING
  • PHOTOPRODUCTION
  • Q(2)
  • QCD

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