Observation of a coherence length effect in exclusive ρ0 Electroproduction

HERMES Collaboration

Research output: Contribution to journalArticlepeer-review

61 Citations (Scopus)

Abstract

Exclusive incoherent electroproduction of the ρ0(770) meson from 1H, 2H, 3He, and 14N targets has been studied by the HERMES experiment at squared four-momentum transfer Q2 > 0.4GeV2 and positron energy loss v from 9 to 20 GeV. The ratio of the 14N to 1H 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.

Original languageEnglish
Pages (from-to)3025-3029
Number of pages5
JournalPhysical review letters
Volume82
Issue number15
DOIs
Publication statusPublished - 1999

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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