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Author Granados, Carlos G. ♦ Sargsian, Misak M.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword NUCLEAR PHYSICS AND RADIATION PHYSICS ♦ AMPLITUDES ♦ ANGULAR DISTRIBUTION ♦ CENTER-OF-MASS SYSTEM ♦ COMPUTERIZED SIMULATION ♦ CROSS SECTIONS ♦ DEUTERONS ♦ FORECASTING ♦ NUCLEONS ♦ PHOTONS ♦ PHOTONUCLEAR REACTIONS ♦ QUANTUM CHROMODYNAMICS ♦ QUARKS ♦ RESCATTERING ♦ TRANSVERSE MOMENTUM ♦ WAVE FUNCTIONS ♦ BARYONS ♦ BOSONS ♦ CHARGED PARTICLES ♦ DISTRIBUTION ♦ ELEMENTARY PARTICLES ♦ FERMIONS ♦ FIELD THEORIES ♦ FUNCTIONS ♦ HADRONS ♦ LINEAR MOMENTUM ♦ MASSLESS PARTICLES ♦ NUCLEAR REACTIONS ♦ QUANTUM FIELD THEORY ♦ SCATTERING ♦ SIMULATION
Abstract We study high-energy photodisintegration of the deuteron into two {Delta} isobars at large center of mass angles within the QCD hard rescattering model (HRM). According to the HRM, the process develops in three main steps: the photon knocks a quark from one of the nucleons in the deuteron; the struck quark rescatters off a quark from the other nucleon sharing the high energy of the photon; then the energetic quarks recombine into two outgoing baryons which have large transverse momenta. Within the HRM, the cross section is expressed through the amplitude of pn{yields}{Delta}{Delta} scattering which we evaluated based on the quark-interchange model of hard hadronic scattering. Calculations show that the angular distribution and the strength of the photodisintegration is mainly determined by the properties of the pn{yields}{Delta}{Delta} scattering. We predict that the cross section of the deuteron breakup to {Delta}{sup ++}{Delta}{sup -} is 4-5 times larger than that of the breakup to the {Delta}{sup +}{Delta}{sup 0} channel. Also, the angular distributions for these two channels are markedly different. These can be compared with the predictions based on the assumption that two hard {Delta} isobars are the result of the disintegration of the preexisting {Delta}{Delta} components of the deuteron wave function. In this case, one expects the angular distributions and cross sections of the breakup in both {Delta}{sup ++}{Delta}{sup -} and {Delta}{sup +}{Delta}{sup 0} channels to be similar.
ISSN 05562813
Educational Use Research
Learning Resource Type Article
Publisher Date 2011-05-15
Publisher Place United States
Journal Physical Review. C, Nuclear Physics
Volume Number 83
Issue Number 5


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