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Incoherent {pi}{sup 0} photoproduction from complex nuclei

Journal Article · · Physical Review. C, Nuclear Physics
; ;  [1];  [1];  [1]; ;  [2]
  1. Instituto de Fisica da Universidade de Sao Paulo, P.O. Box 66318, CEP 05315-970, Sao Paulo (Brazil)
  2. Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky, 40506 (United States)
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Incoherent {pi}{sup 0} photoproduction from nuclei is evaluated via a multicollisional intranuclear cascade framework. In-medium modifications are taken into account, including a realistic dynamical treatment of multiple {pi}N and {delta}N scattering processes throughout the cascade. This time-dependent analysis yields structures in the {sup 12}C {pi}{sup 0} differential cross section both in the {delta} region and in the photon energy range from 5 to 6 GeV, with the former in very nice agreement with recent results from Mainz Microton. For heavy nuclei, however, such structures disappear because of a more effective Fermi motion and a relatively higher final state interaction of the produced pions as they exit the nucleus. The calculation of the incoherent part of the total {pi}{sup 0} photoproduction propitiates a clean and powerful kinematical separation from competitive (electromagnetic/nuclear) production processes, which currently is a theoretical challenge for the PrimEx experiment at the Jefferson Lab.
OSTI ID:
20698641
Journal Information:
Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 5 Vol. 71; ISSN 0556-2813; ISSN PRVCAN
Country of Publication:
United States
Language:
English

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Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CARBON 12
CEBAF ACCELERATOR
DELTA BARYONS
DIFFERENTIAL CROSS SECTIONS
FINAL-STATE INTERACTIONS
GEV RANGE
NUCLEAR CASCADES
NUCLEAR MATTER
PHOTON-NUCLEON INTERACTIONS
PHOTONS
PHOTONUCLEAR REACTIONS
PHOTOPRODUCTION
PIONS NEUTRAL
TIME DEPENDENCE