Mathematics – Probability
Scientific paper
Mar 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aps..aprh10003n&link_type=abstract
American Physical Society, APS April Meeting 2012, March 31-Apr 3, 2012, abstract #H10.003
Mathematics
Probability
Scientific paper
The probabilities of short-range correlations (SRC), meson-exchange currents and final-state interactions in nuclei contribute to the measured observables that are mostly being interpreted within strongly model-dependent pictures. Studying the short-distance structure and virtual nucleon excitations, especially isobar configurations in the nuclear ground state, are important subjects in experimental nuclear physics. Since the SRC are local high-density regions, it is likely that the quark distributions of nucleons would make a transition to non-nucleonic configurations. A number of theoretical calculations predict the probability of finding one or more nucleons in an excited state. In some studies, isobar excitations have been explicitly included in the few-body models. In this work we have explored a recent data set of photon-induced reactions from nuclear targets to study various photoproduction channels that contain one or more δ-isobar configurations, for example, the γ^3He ->+circ;nn or γ^3He ->+circ;0̂n reactions. Data were taken with CLAS in Hall B at Jefferson Laboratory using an incident photon-beam energy of 0.5-1.5 GeV on a ^3He target. Preliminary results and future plans will be discussed.
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