Probing the High Momentum Component of the Deuteron at HighQ2

Abstract

The (2)H(e,e'p)n cross section at a momentum transfer of 3.5 (GeV/c)(2) was measured over a kinematical range that made it possible to study this reaction for a set of fixed missing momenta as a function of the neutron recoil angle θ(nq) and to extract missing momentum distributions for fixed values of θ(nq) up to 0.55 GeV/c. In the region of 35°≤θ(nq)≤45° recent calculations, which predict that final-state interactions are small, agree reasonably well with the experimental data. Therefore, these experimental reduced cross sections provide direct access to the high momentum component of the deuteron momentum distribution in exclusive deuteron electrodisintegration.

Experimental Deuteron Momentum Distributions with Reduced Final State Interactions

“…A precise measurement of the high momentum component of the deuteron ground state wave function is the key to understanding the short-range part of nuclear structure. Three types of reactions are used to study the high momentum part of the deuteron wave function: elastic scattering, inclusive and exclusive electro-disintegration reactions [3]. High nucleon momenta can be investigated through the exclusive, quasielatic electro-disintegration of the deuteron at high missing momenta.…”

Hard QCD Processes in the Nuclear Medium

“…The presence of a p-n rescattering peak at this angle is also well-known from deuteron electrodisintegration [85][86][87][89][90][91][92].…”

“…This regime is the eikonal regime, as a great deal of recent experimental and theoretical work has establish, cf. [87,[89][90][91][92][93][94][95][96]. The generalized eikonal approximation (GEA) is briefly discussed in Sec.…”

“…This can be accomplished within the generalized eikonal approximation (GEA) [87,[89][90][91][92][93][94][95][96], which is justified when the final momenta of the rescattered hadrons are on the order of a GeV or above.…”

“…This reaction is chosen because a variety of recent experimental and theoretical studies have demonstrated the presence of a rescattering peak due to final state interactions (FSIs), cf. [85][86][87][88][89][90][91][92].…”