Analyzing powers in $$d(\vec {p}, pp)n$$ at intermediate and large scattering angles at 190 MeV

Abstract

Understanding of the exact nature of three-nucleon forces is the most challenging topic in the field of nuclear physics. Three-nucleon break-up reaction is a good tool to look into the underlying dynamics of the nuclear force, thanks to its rich kinematical phase space which has different levels of sensitivity to three-nucleon force effects. The recent studies on few-nucleon systems have revealed that the current nuclear force models cannot describe nucleon-deuteron scattering data accurately. In the present work, the analyzing powers of the proton-deuteron break-up reaction obtained using a 190 MeV polarized proton beam will be discussed. We present for the first time the vector analyzing powers for the kinematics in which one of the protons scatters to intermediate and large scattering angles at this energy. The results are particularly useful to study the high-momentum components of the nuclear force. The results show a fairly good agreement with various theoretical predictions for both intermediate and large scattering angles of the break-up phase space.PACS. 21.45.+v Few-body systems -13.75.Cs Nucleon-nucleon interactions arXiv:1910.13605v1 [nucl-ex]

A Comprehensive Measurement of Analyzing Powers in the Proton-Deuteron Break-Up Channel at 135 MeV

“…2-4 with respect to small and large relative azimuthal angles. Similar behaviours were also observed in the measurements of the same observables at 190 MeV [38].…”

Experimental Studies of the Three Nucleon System Dynamics in the Proton Induced Deuteron Breakup at 108 MeV

“…The discrepancy is strongly reduced after including 3NF (Fig. 1 A xx , A xy , A yy 65 [26], 80 [23,37] σ pd 135 [38][39][40], 190 [41,42] σ, A The thesis is organized in the following way: the theoretical background of the three-nucleon system is briefly described in Chapter 2. The experimental program and the detection setup description are contained in Chapter 3.…”