Strange and non-strange particle production in antiproton–nucleus collisions in the UrQMD model

Abstract

The capabilities of the ultra-relativistic quantum molecular dynamics (UrQMD) model in describing antiproton-nucleus collisions are presented. The model provides a good description of the experimental data on multiplicities, transverse momentum distributions and rapidity distributions in antiprotonnucleus collisions. Special emphasis is put on the comparison of strange particles in reactions with nuclear targets ranging from 7 Li, 12 C, 32 S, 64 Cu to 131 Xe because of the important role of strangeness for the exploration of hypernuclei at PANDA-FAIR. The productions of the double strange baryons − and ¯ + , which may be used to produce double hypernuclei, are predicted in this work for the reactions p + 24 Mg, 64 Cu and 197 Au.

Kaonic hydrogen atoms with realistic potentials

“…The success of the effective field theory applied to kaonic hydrogen makes it possible to construct equivalent local KN potentials, which may be conveniently applied to computations of K-nuclear few-body systems and hyper-nucleus productions [11]. The solution of the Schrödinger or Lippmann-Schwinger equation with such an equivalent potential should approximate as closely as possible the scattering amplitude derived from the full coupled-channel calculation of the effective field theory.…”

“…The most recent experimental values on the energy shift and decay width of the ground state of kaonic hydrogen are, respectively, E 1s = −193 ± 37 (stat) ± 6 (syst) eV (11) and 1s = 249 ± 111 (stat) ± 30 (syst) eV (12) obtained by the DEAR Collaboration [1]. These values are smaller by a factor of almost 2 than the experimental values measured by the KEK Collaboration [22], which are, [19,20] compared with the K − p scattering lengthsã K − p (taken from Refs.…”