Naslov
Measurement of antineutron-proton total and annihilation cross section from 100-500 MeV/c

Autori
Armstrong, T. ; Chu, T. ; Clement, J. ; Elinon, C. ; Furić, Miroslav ; Hartman, K. ; Hicks, A. ; Hungerford, E. ; Kashimoto, T. ; Kruk, J. ; Lewis, R. ; Lowenstein, D. ; Lochstet, W. ; Meyer, B. ; Moss, B. ; Mutchler, G. ; Pinsky, L. ; Smith, G.A. ; Tang, L. ; Von Witsch W. ; Xue Y. ;

Izvornik
Physical review. D, Particles and fields (0556-2821) 36 (1987), 3; 659-673

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
antineutron-proton ; total ; annihilation ; cross sections

Sažetak
Total and annihilation n¯p cross sections from 100 to 500 MeV/c are reported, the first such measurements with good statistics in this momentum range. These cross sections are well represented by A+B/p, where p is the incident antineutron momentum, and are in agreement with previous n¯p and p¯n measurements. A comparison of these cross sections with phenomenological potential model calculations is good overall. However, the microscopic quark model gives unsatisfactory predictions. The agreement between previous p¯p annihilation cross sections and n¯p cross sections above 300 MeV/c is excellent. The total n¯p cross section is lower than the total p¯p cross section in this momentum range. Both of these types of behavior are predicted by potential models. The anticipated availability of future p¯p data below 300 MeV/c should indicate whether these trends continue at lower momenta.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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