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Title: Hard breakup of the deuteron into two {Delta} isobars

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.more » 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.« less

Authors:
;  [1]
  1. Florida International University, Miami, Florida 33199 (United States)
Publication Date:
OSTI Identifier:
21502477
Resource Type:
Journal Article
Journal Name:
Physical Review. C, Nuclear Physics
Additional Journal Information:
Journal Volume: 83; Journal Issue: 5; Other Information: DOI: 10.1103/PhysRevC.83.054606; (c) 2011 American Institute of Physics; Journal ID: ISSN 0556-2813
Country of Publication:
United States
Language:
English
Subject:
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

Citation Formats

Granados, Carlos G, and Sargsian, Misak M. Hard breakup of the deuteron into two {Delta} isobars. United States: N. p., 2011. Web. doi:10.1103/PHYSREVC.83.054606.
Granados, Carlos G, & Sargsian, Misak M. Hard breakup of the deuteron into two {Delta} isobars. United States. doi:10.1103/PHYSREVC.83.054606.
Granados, Carlos G, and Sargsian, Misak M. Sun . "Hard breakup of the deuteron into two {Delta} isobars". United States. doi:10.1103/PHYSREVC.83.054606.
@article{osti_21502477,
title = {Hard breakup of the deuteron into two {Delta} isobars},
author = {Granados, Carlos G and Sargsian, Misak M},
abstractNote = {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.},
doi = {10.1103/PHYSREVC.83.054606},
journal = {Physical Review. C, Nuclear Physics},
issn = {0556-2813},
number = 5,
volume = 83,
place = {United States},
year = {2011},
month = {5}
}