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Title: Evidence for the onset of color transparency in ρ 0 electroproduction off nuclei

We have measured the nuclear transparency of the incoherent diffractive A(e,e'ρ 0) 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 (I c), a lifetime of the hadronic fluctuation of the virtual photon, and the four-momentum transfer squared (Q 2). Thus, while the transparency for both 12C and 56Fe showed no I c dependence, a significant Q 2 dependence was measured, which is consistent with calculations that included the color transparency effects.
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Publication Date:
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
OSTI Identifier:
1041310