Eur. Phys. J. A (2020) 56: 81
https://doi.org/10.1140/epja/s10050-020-00085-0

Letter

Analyzing powers in at intermediate and large scattering angles at 190 MeV

¹ KVI-CART, University of Groningen, Groningen, The Netherlands
² Department of Physics, University of Sistan and Baluchestan, Zahedan, Iran
³ Institute of Theoretical Physics and Astronomy, Vilnius University, Saulėtekio al. 3, 10222, Vilnius, Lithuania
⁴ Department of Physics, School of Science, Yazd University, Yazd, Iran
⁵ M. Smoluchowski Institute of Physics, Jagiellonian University, 30348, Kraków, Poland
⁶ Institute of Nuclear Physics, PAS, 31342, Kraków, Poland
⁷ Department of Physics, Faculty of Science, University of Kashan, Kashan, Iran
⁸ Department of Physics, University of Tehran, Tehran, Iran
⁹ Institute of Physics, University of Silesia, Chorzow, Poland

^* e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Received: 31 October 2019
Accepted: 3 February 2020
Published online: 10 March 2020

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 show a fairly good agreement with various theoretical predictions for both intermediate and large scattering angles of the break-up phase space.