Nuclear annihilation by antinucleons

Journal Article · Mon Jan 25 00:00:00 EST 2016 · Physical Review C

DOI:https://doi.org/10.1103/PhysRevC.93.014616· OSTI ID:1237156

Lee, Teck-Ghee ^[1]; Wong, Cheuk-Yin ^[2]

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1. Auburn Univ., AL (United States)
2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

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_lab < 500 MeV/c, and the two annihilation cross sections approach the Pomeranchuk's equality limit [JETP 30, 423 (1956)] at p_lab ~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.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• Grant/Contract Number: AC05-00OR22725
• OSTI ID: 1237156
• Alternate ID(s): OSTI ID: 1235952
• Journal Information: Physical Review C, Vol. 93, Issue 1; ISSN 2469-9985
• Publisher: APS
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS