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Title: Evidence for the onset of color transparency in ρ0 electroproduction off nuclei

We have measured the nuclear transparency of the incoherent diffractive A(e,e'ρ0) process in 12C and 56Fe targets relative to 2H using a 5 GeV electron beam. The nuclear transparency, the ratio of the produced {rho}{sup 0}'s on a nucleus relative to deuterium, which is sensitive to ρA interaction, was studied as function of the coherence length (Ic), a lifetime of the hadronic fluctuation of the virtual photon, and the four-momentum transfer squared (Q2). Thus, while the transparency for both 12C and 56Fe showed no Ic dependence, a significant Q2 dependence was measured, which is consistent with calculations that included the color transparency effects.
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Publication Date:
OSTI Identifier:
1041310
Report Number(s):
JLAB-PHY--12-1504; DOE/OR/23177--2158; arXiv:1201.2735
Journal ID: ISSN 0370-2693; PYLBAJ; TRN: US201211%%493
Grant/Contract Number:
AC05-06OR23177; FG02-88ER40410
Type:
Accepted Manuscript
Journal Name:
Physics Letters. Section B
Additional Journal Information:
Journal Volume: 712; Journal Issue: 4-5; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Research Org:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Contributing Orgs:
CLAS Collaboration
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; COHERENCE LENGTH; COLOR; DEUTERIUM; ELECTRON BEAMS; ELECTROPRODUCTION; FLUCTUATIONS; LIFETIME; NUCLEI; TARGETS