Pionic transparency in semi-exclusive electroproduction off nuclei

Journal Article · Thu Jan 15 04:00:00 EST 2009 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.79.015207· OSTI ID:21199522

Kaskulov, Murat M; Gallmeister, Kai; Mosel, Ulrich ^[1]

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1. Institut fuer Theoretische Physik, Universitaet Giessen (Germany)

We investigate the early onset of pionic color transparency ({pi}CT) observed at Jefferson Laboratory (JLAB) in semi-exclusive pion electroproduction reaction A(e,e{sup '}{pi}{sup +}) off nuclei. In the present description the primary {gamma}*p{yields}{pi}{sup +}n interaction is described very well both for the longitudinal and the transverse polarizations. For the final state interactions a coupled-channel treatment of the interactions of transmitted hadrons allows to go beyond the Glauber approximation. We show that a proper distinction between the soft hadronic and hard partonic components of the electroproduction amplitude is essential for a quantitative description of the measured nuclear transparency. The data are well reproduced if one assumes that point-like configurations are produced in the regime of hard deep-inelastic scattering (DIS) off partons and dominate the transverse channel.

• OSTI ID: 21199522
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 1 Vol. 79; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
APPROXIMATIONS
CEBAF ACCELERATOR
COLOR MODEL
CONFIGURATION
COUPLED CHANNEL THEORY
DECAY
DEEP INELASTIC SCATTERING
ELECTRON CAPTURE
ELECTROPRODUCTION
FINAL-STATE INTERACTIONS
NUCLEI
OPACITY
PIONS
PIONS PLUS
POLARIZATION