Three-Nucleon Dynamics in the dp breakup collisions at 190 MeV/nucleon using the WASA detector at COSY-J\"{u}lich

TL;DR

This study measures the differential cross section of the deuteron breakup reaction at 380 MeV, comparing experimental data with various theoretical models, revealing discrepancies at low cross sections even with relativistic calculations.

Contribution

It provides high-precision experimental data for the $^{1}$H$(d,pp)n$ reaction at 380 MeV and evaluates multiple theoretical approaches against this data.

Findings

Discrepancies observed between data and theory at low cross sections.

Relativistic calculations do not fully resolve the differences.

High-precision differential cross section data obtained.

Abstract

The differential cross section for the $^{1}$H$(d,pp)n$ breakup reaction at deuteron beam energy of 380 MeV has been determined with high precision for 189 angular configurations of outgoing protons in the region of forward laboratory angles. The cross section data were compared to theoretical predictions based on the state-of-the-art nucleon-nucleon potentials, combined with a three-nucleon force, the Coulomb interaction or carried out in a relativistic approach. In the region of the lowest differential cross section, the discrepancy between the data and the theoretical predictions is observed, also in the case of relativistic calculations.