Importance of the deuteron breakup in the deuteron knockout reaction

Abstract

An isoscalar $pn$ pair is expected to emerge in nuclei that have similar proton and neutron numbers and it may be a candidate for a deuteron ``cluster.'' There is, however, no experimental evidence for it. The purpose of this paper is to construct a new reaction model for the ($p,pd$) reaction including the deuteron breakup in the elementary process and the deuteron reformation by the final-state interactions (FSIs). How these processes contribute to the observables of the reaction is investigated. The distorted wave impulse approximation is extended in twofold. The elementary processes of the ($p,pd$), i.e., the $p$-$d$ elastic scattering and $d(p,p)pn$ reaction, are described with an impulse picture employing a nucleon-nucleon effective interaction. The three-body scattering waves in the final state of the ($p,pd$) reaction are calculated with the continuum-discretized coupled-channels method. The triple differential cross section (TDX) of the ($p,pd$) reaction is calculated with the new model. The elementary processes are described reasonably well with the present model. As for the ($p,pd$) reaction, the deuteron reformation can either increase or decrease the TDX height depending on the interference between the elastic and breakup channel of deuteron, while the \textit{back-coupling} effect always decreases it. It is shown that the deuteron reformation significantly changes the TDX of the ($p,pd$) reaction through the interference. It is important to include this process to quantitatively discuss the ($p,pd$) cross sections in view of the deuteron formation in nuclei. For more quantitative discussion regarding the experimental data, further improvement will be necessary.

arXiv comment11 pages, 5 figures

References in corpus (17)

• Probing Cold Dense Nuclear Matter
• Measurement of 2- and 3-Nucleon Short Range Correlation Probabilities in Nuclei
• Tensor Forces and the Ground-State Structure of Nuclei
• A consistent analysis of (e,e'p) and (d,3He) experiments
• The cross section minima in elastic Nd scattering: a ``smoking gun'' for three nucleon force effects
• Investigation of Proton-Proton Short-Range Correlations via the 12C(e,e'pp) Reaction
• Overview of Neutron-Proton Pairing
• Observation of Nuclear Scaling in the $A(e,e^{\prime })$ Reaction at $x_B>$1
• The continuum discretized coupled-channels method and its applications
• Exclusive Electro-Disintegration of 3He at high Q2: II. Decay Function Formalism
• New treatment of breakup continuum in the method of continuum discretized coupled channels
• Asymmetry of the parallel momentum distribution of (p,pN) reaction residues
• Investigating the alpha-clustering on the surface of ${}^{120}$Sn via ($p$,$p\alpha$) reaction and the validity of the factorization approximation
• Modern NN Force Predictions for the Total ND Cross Section up to 300 MeV
• Dominance of tensor correlations in high-momentum nucleon pairs studied by (p,pd) reaction
• Proton-neutron pairing vibrations in N=Z nuclei: Precursory soft mode of isoscalar pairing condensation
• Adiabatic model of $(d,p)$ reactions with explicitly energy-dependent non-local potentials

Cited by in corpus (1)

• Significance of the refraction effect on the $p$-$d$ elementary process in the ($p$,$pd$) reaction