Vector analyzing powers in the $d(p,pp)n$ and $d(p,{}^2\mathrm{He})n$ channels at 135 MeV

Abstract

Vector analyzing powers, $A_x$ and $A_y$, of the proton-deuteron break-up reaction have been measured by using a polarized-proton beam at 135 MeV impinging on a liquid-deuterium target. For the experiment, the Big Instrument for Nuclear-polarization Analysis (BINA) was used at KVI, Groningen, the Netherlands. The data are compared to the predictions of Faddeev calculations using state-of-the-art two- and three-nucleon potentials. Our data are reasonably well described by calculations for the kinematical configurations at which the three-nucleon force (3NF) effect is predicted to be small. However, striking discrepancies are observed at specific configurations, in particular in the cases of symmetric configurations, where the relative azimuthal angle between the two protons is small which corresponds to the $d(p,{}^2\mathrm{He})n$ channel. The vector analyzing powers of these configurations are compared to the proton deuteron elastic scattering to study the spin-isospin sensitivity of the 3NF models. The results are compared to the earlier results of the proton-deuteron break-up reaction at 190 MeV proton-beam energy \cite{Mardanpour2010}. A disagreement is observed for both proton-beam energies between data and calculations which points to a deficiency in the treatment of spin-isospin part of the 3NF.

arXiv comment6 pages, 6 figures, submitted to EPJA

References in corpus (13)

• An accurate nucleon-nucleon potential with charge-independence breaking
• The high-precision, charge-dependent Bonn nucleon-nucleon potential (CD-Bonn)
• Realistic models of pion-exchange three-nucleon interactions
• Nuclear forces from chiral Lagrangians using the method of unitary transformation II: The two-nucleon system
• Signatures of three-nucleon interactions in few-nucleon systems
• Two Nucleon Systems at $m_{\pi }\sim 450\mathrm{MeV}$ from Lattice QCD
• Resonance saturation for four-nucleon operators
• Triton calculations with the new Nijmegen potentials
• Faddeev-type calculation of three-body nuclear reactions including core excitation
• Elastic proton-deuteron scattering at intermediate energies
• Historical perspective and future prospects for nuclear interactions
• Spin-isospin selectivity in three-nucleon forces
• Three-nucleon system: Irreducible and reducible contributions of the three-nucleon force

Cited by in corpus (3)

• A comprehensive analysis of differential cross sections and analyzing powers in the proton-deuteron break-up channel at 135 MeV
• A comprehensive study of analyzing powers in the proton-deuteron break-up channel at 135 MeV
• Precision measurements of differential cross sections and analyzing powers in elastic deuteron-deuteron scattering at 65 MeV/nucleon