Production of polarized vector mesons off nuclei

Journal Article · Wed Aug 15 04:00:00 EDT 2007 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.76.025210· OSTI ID:21061999

Kopeliovich, B Z ^[1]; Nemchik, J ^[2]; Schmidt, Ivan ^[1]

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1. Departamento de Fisica y Centro de Estudios Subatomicos, Universidad Tecnica Federico Santa Maria, Valparaiso (Chile)
2. Institute of Experimental Physics SAS, Watsonova 47, SK-04001 Kosice (Slovakia)

Using the light-cone QCD dipole formalism we investigate manifestations of color transparency (CT) and coherence length (CL) effects in electroproduction of longitudinally (L) and transversally (T) polarized vector mesons. Motivated by forthcoming data from the HERMES experiment we predict both the A and Q{sup 2} dependence of the L/T ratios for {rho}{sup 0} mesons produced coherently and incoherently off nuclei. For an incoherent reaction the CT and CL effects add up and result in a monotonic A dependence of the L/T ratio at different values of Q{sup 2}. In contrast, for a coherent process the contraction of the CL with Q{sup 2} causes an effect opposite to that of CT and we expect quite a nontrivial A dependence.

• OSTI ID: 21061999
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 2 Vol. 76; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
COHERENCE LENGTH
COLOR MODEL
DIPOLES
ELECTROPRODUCTION
FOUR MOMENTUM TRANSFER
LIGHT CONE
MULTIPARTICLE SPECTROMETERS
NUCLEI
OPACITY
PARTICLE IDENTIFICATION
QUANTUM CHROMODYNAMICS
RHO-770 MESONS