| Autor: |
A. Gerard, J.C. Montret, P. Bertin, J. Morgenstern, P. Vernin, B. Coupat, J. Duclos, J. Miller, B. Michel, A. Magnon |
| Rok vydání: |
1973 |
| Předmět: |
|
| Zdroj: |
Physics Letters B. 43:245-248 |
| ISSN: |
0370-2693 |
| DOI: |
10.1016/0370-2693(73)90280-3 |
| Popis: |
We have determined the pion charge exchange cross section on hydrogen for π ° mesons emitted at 180° by measuring neutron time-of-flight. Using known values of the p-wave phase shifts we have deduced the contribution of the s-wave. We obtain a value for the quantity a 1 − a 3 (in h = c = m =1 units where m is the pion mass) =0.270±0.014 in agreement within the errors with recent theoretical calculations. We also find a value of 114±55 μb / sr for the cross section in the center of mass system for radiative pion capture at 22.6 MeV (gamma ray emitted at 180°). |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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