Hard breakup of the deuteron into two {Delta} isobars
Abstract
We study highenergy 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 quarkinterchange 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 45 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 »
 Authors:

 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 05562813
 Country of Publication:
 United States
 Language:
 English
 Subject:
 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; AMPLITUDES; ANGULAR DISTRIBUTION; CENTEROFMASS 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 highenergy 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 quarkinterchange 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 45 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 = {05562813},
number = 5,
volume = 83,
place = {United States},
year = {2011},
month = {5}
}