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Title: Nuclear annihilation by antinucleons

We examine the momentum dependence of $$\bar p$$$p$ and $$\bar n$$$p$ annihilation cross sections by considering the transmission through a nuclear potential and the $$\bar p p$$ Coulomb interaction. Compared to the $$\bar n p$$ annihilation cross section, the $$\bar p p$$ annihilation cross section is significantly enhanced by the Coulomb interaction for projectile momenta below $$p_{\rm lab} <$$ 500 MeV/$c$$, and the two annihilation cross sections approach the Pomeranchuk's equality limit [JETP {\bb 30}, 423 (1956)] at $$p_{\rm lab}\sim 500$ MeV/$c$. Using these elementary cross sections as the basic input data, the extended Glauber model is employed to evaluate the annihilation cross sections for $$\bar n$$ and $$\bar p$$ interaction with nuclei and the results compare well with experimental data.
Authors:
 [1] ;  [2]
  1. Auburn Univ., AL (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
OSTI Identifier:
1237156
Grant/Contract Number:
AC05-00OR22725
Type:
Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 93; Journal Issue: 1; Journal ID: ISSN 2469-9985
Publisher:
APS
Research Org:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS