| Autor: |
C. Zanfino, J. F. Martin, T. S. Yoon, N. R. Stanton, P. Brockman, A.J. Pawlicki, D. Legacey, J.A. Dankowych, K. W. Edwards, J.D. Prentice, P. M. Patel, J. Gandsman, E. Shabazian |
| Rok vydání: |
1980 |
| Předmět: |
|
| Zdroj: |
Physics Letters B. 92:353-357 |
| ISSN: |
0370-2693 |
| DOI: |
10.1016/0370-2693(80)90281-6 |
| Popis: |
The ratio R of the differential cross sections for π - p→ η ′n and π - p → η n has been measured with high statistics and small systematic errors at 8.45 GeV/ c . R is generally interpreted as the relative content of nonstrange, ground-state quarks in η' and η. We find that R decreases with increasing ⋎ t ⋎; however, extrapolation to t =0 gives R (0) = 0.672 ± 0.032 (statistical) ± 0.47 (systematic) for the dominant spin flip cross sections, and R (0) = 0.500 ± 0.035 for the spin non-flip, in excellent agreement with results at higher energy. An improved value of the branching fraction ( η '→ γγ )/( η '→all) of 0.0200 ± 0.0018 is obtained. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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