Hard Photodisintegration of a Proton Pair in 3He

Abstract

Hard photodisintegration of the deuteron has been extensively studied in order to understand the dynamics of the transition from hadronic to quark-gluon descriptions of the strong interaction. In this work, we discuss the extension of this program to hard photodisintegration of a $pp$ pair in the ${}^3$He nucleus. Experimental confirmation of new features predicted here for the suggested reaction would advance our understanding of hard nuclear reactions. A main prediction, in contrast with low-energy observations, is that the $pp$ breakup cross section is not much smaller than the one for $pn$ break up.In some models, the energy-dependent oscillations observed for $pp$ scattering are predicted to appear in the ${\gamma }^3\mathrm{He}\to pp+n$ reaction. Such an observation would open up a completely new field in studies of color coherence phenomena in hard nuclear reactions. We also demonstrate that, in addition to the energy dependence, the measurement of the light-cone momentum distribution of the recoil neutron provides an independent test of the underlying dynamics of hard disintegration.

arXiv comment15 pages, 4 eps figures

References in corpus (9)

• Hard Scattering and Gauge/String Duality
• Electromagnetic structure of the deuteron
• Femtometer Toroidal Structures in Nuclei
• Measurements of Deuteron Photodisintegration up to 4.0 GeV
• Selected Topics in High Energy Semi-Exclusive Electro-Nuclear Reactions
• QCD Rescattering and High Energy Two-Body Photodisintegration of the Deuteron
• Recalculation of Proton Compton Scattering in Perturbative QCD
• Deuteron photodisintegration within the Quark-Gluon Strings Model and QCD motivated nonlinear Regge trajectories
• Solution of the Faddeev-Yakubovsky equations using realistic NN and 3N interaction

Cited by in corpus (15)

• Hard probes of short-range nucleon-nucleon correlations
• Recent observation of short range nucleon correlations in nuclei and their implications for the structure of nuclei and neutron stars
• Transition between nuclear and quark-gluon descriptions of hadrons and light nuclei
• Description of intermediate- and short-range NN nuclear force within a covariant effective field theory
• Complete Angular Distribution Measurements of Two-Body Deuteron Photodisintegration between 0.5 and 3 GeV
• Angular dependence of recoil proton polarization in high-energy γd \to p n
• Complete measurement of three-body photodisintegration of 3He for photon energies between 0.35 and 1.55 GeV
• Hard Photodisintegration of a Proton Pair
• Observation of inverse diproton photodisintegration at intermediate energies
• Hard Break-Up of Two-Nucleons from the 3He Nucleus
• Determination of the Beam-Spin Asymmetry of Deuteron Photodisintegration in the Energy Region $E_{\gamma }=1.1-2.3$ GeV
• Hard breakup of the deuteron into two Delta-isobars
• Search for scaling onset in exclusive reactions with the lightest nuclei
• Hard Photodisintegration of 3He into pd pair
• Reduced nuclear helicity amplitudes for deuteron electrodisintegration and other processes