Observation of a Coherence Length Effect in Exclusiveρ0Electroproduction

1998/11/06 by K. Ackerstaff, A. Airapetian, Н. Акопов +97 · 3 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Meson #Nuclear physics #Nuclear physics research studies #Particle physics #Physics #Quantum Chromodynamics and Particle Interactions #Quark #Strange quark #hep-ex

paper · pdf · doi:10.1103/physrevlett.82.3025

published as Phys.Rev.Lett.82:3025-3029,1999 · RevTeX, 5 pages, 3 figures

arxiv created 1998/11/06 · openalex publication_date 1999/04/12 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

Exclusive incoherent electroproduction of the \ensuremathρ⁰(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 \ensuremathν 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.

Citations

• How to identify color transparency effects in electroproducton of vector mesons off nuclei
• Theory of strong interactions
• Using nuclei to probe hadronization in QCD
• The hadronic properties of the photon in high-energy interactions
• Conservation of Isotopic Spin and Isotopic Gauge Invariance

Cited by

• Hard exclusive electroproduction of π+π− pairs
• Rescattering in meson photoproduction from few body systems
• Nuclear deep-inelastic lepton scattering and coherence phenomena