| Autor: |
Ziegler, M., Ahmad, S., Amsler, C., Armenteros, R., Auld, E.G., Axen, D.A., Bailey, D., Barlag, S., Beer, G.A., Bizot, J.C., Botlo, M., Comyn, M., Dahme, W., Delcourt, B., Doser, M., Duch, K.D., Erdman, K.L., Feld-Dahme, F., Gastaldi, U., Heel, M., Howard, B., Howard, R., Jeanjean, J., Kalinowsky, H., Kayser, F., Klempt, E., Laa, C., Landua, R., Marshall, G.M., Nguyen, H., Prevot, N., Riedlberger, J., Rieger, R., Robertson, L.P., Sabev, C., Schaefer, U., Schreiber, O., Straumann, U., Truoel, P., Vonach, H., Weidenauer, P., White, B.L., Wodrich, W.R. |
| Zdroj: |
Physics Letters B; May 1988, Vol. 206 Issue: 1 p151-158, 8p |
| Abstrakt: |
The KαX-rays from pp̄ atoms formed in H2gas at normal temperature and pressure are unambiguously identified by coincidences with L X-rays populating the 2P level. Background due to inner bremsstrahlung is suppressed by selecting events annihilating into neutral final states only. The Kαline is observed with a significance of more than 25 standard deviations at an energy of 8.67 (15) keV. From fits to the Kαline we obtain a strong-interaction shift and width of the 1S level, averaged over the unresolved spin singlet and triplet contributions, of ΔE+ iΓ/2 = [−0.70(15) + i0.80(20)] keV. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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