Hard breakup of the deuteron into two {Delta} isobars

Journal Article · Sun May 15 00:00:00 EDT 2011 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.83.054606· OSTI ID:21502477

Granados, Carlos G; Sargsian, Misak M ^[1]

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1. Florida International University, Miami, Florida 33199 (United States)

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.

• OSTI ID: 21502477
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 83, Issue 5; Other Information: DOI: 10.1103/PhysRevC.83.054606; (c) 2011 American Institute of Physics; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 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