Measurement of antineutron-proton total and annihilation cross sections from 100 to 500 MeV/c

T. Armstrong, C. Chu, J. Clement, C. Elinon, M. Furic, K. Hartman, A. Hicks, E. Hungerford, T. Kishimoto, J. Kruk, R. Lewis, D. Lowenstein, W. Lochstet, B. Mayes, R. Moss, G. S. Mutchler, L. Pinsky, G. A. Smith, L. Tang, W. Von WitschY. Xueb

研究成果: Article同行評審

67 引文 斯高帕斯(Scopus)

摘要

Total and annihilation np 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 np and pn 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 pp annihilation cross sections and np cross sections above 300 MeV/c is excellent. The total np cross section is lower than the total pp cross section in this momentum range. Both of these types of behavior are predicted by potential models. The anticipated availability of future pp data below 300 MeV/c should indicate whether these trends continue at lower momenta.

原文English
頁(從 - 到)659-673
頁數15
期刊Physical Review D
36
發行號3
DOIs
出版狀態Published - 1987

All Science Journal Classification (ASJC) codes

  • 物理與天文學(雜項)

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