Systematic investigation of the elastic proton-deuteron differential cross section at intermediate energies

Abstract

To investigate the importance of three-nucleon forces (3NF) systematically over a broad range of intermediate energies, the differential cross sections of elastic proton-deuteron scattering have been measured at proton bombarding energies of 108, 120, 135, 150, 170, and 190 MeV at c.m. angles between 30°and 170°. Comparisons with Faddeev calculations show unambiguously the shortcomings of calculations employing only two-body forces and the necessity of including 3NF. They also show the limitations of the latest few-nucleon calculations at backward angles, especially at higher beam energies. Some of these discrepancies could be partially due to relativistic effects. Data at lowest energy are also compared with a recent calculation based on PT.

Polarization transfer measurement forH1(d⃗,p⃗)HSekiguchi1, Sakai2, Witała3 et al. 2004Phys. Rev. CSelf Cite880250View full textAdd to dashboardCite

“…At higher energies, however, discrepancies remain to the data in the minima and even more at backward angles Ref. [19,48].…”

“…Some indications on their importance was found in the analysis of the high precision nd total cross section data [53] and in the study of backward angular distributions of p-d elastic scattering cross section at higher energies of the incident nucleon [19,48]. The discrepancies between the data and nonrelativistic predictions become larger with increasing energy and cannot be removed by including different 3NFs [53].…”

Experimental Study of Three-Nucleon Dynamics in the Dp Breakup Collisions Using the WASA Detector

“…To obtain differential cross section, the luminosity should be determined on the basis of the number of the elastically-scattered deuterons at a given θ angle and the known cross section for elastic scattering at the studied energy [10]. Systematic scatter of the data in this energy region motivated normalization based on all the data sets from the range of energies (between 216 and 400 MeV) compared to theoretical calculations with the CDBonn potential and TM99 3NF.…”

Systematic Study of Three-Nucleon Systems Dynamics in the Cross Section of the Deuteron–Proton Breakup Reaction

“…The events below this function will be subtracted. In the next steps the rates have to be normalized using rates of dp elastic scattering events, the known scattering cross-section [13], and the detector efficiency.…”