Search for narrow baryonia with negative and positive strangeness

Autor: Aleev, A. N., Arefiev, V. A., Balandin, V. P., Berdyshev, V. K., Birulev, V. K., Chvyrov, A. S., Evsikov, I. I., Grigalashvili, T. S., Gus'kov, B. N., Ivanchenko, I. M., Kapishin, M. N., Karpenko, N. N., Kirillov, D. A., Kosarev, I. G., Kuz'min, N. A., Likhachev, M. F., Lyubimov, A. L., Maksimov, A. N., Moisenz, P. V., Morozov, A. N., Pal'chik, V. V., Pose, A. V., Progulova, T. B., Prokes, A., Rybakov, V. V., Slepets, L. A., Zinchenko, A. I., Kamburyan, A. F., Loktionov, A. A., Potrebenikov, Yu. K., Skorobogatova, V. I., Pazoni, I., Veress, I., Zalan, P., Belousov, A. S., Devitsin, E. G., Fomenko, A. M., Kozlov, V. A., Malinovsky, E. I., Potashev, S. Yu., Rusakov, S. V., Smirnov, P. A., Soloviev, Yu. V., Terkulov, A. R., Shtarkov, L. N., Vazdyk, Ya. A., Zavertyaev, M. V., Chudakov, E. A., Cholakov, V. D., Haladky, J., Novak, M., Smizanska, M., Vetsko, M., Zayachky, V. I., Krastev, V. R., Burilkov, D. T., Markov, P. K., Todorov, P. T., Trayanov, R. K., Abesalashvili, L. N., Amaglobeli, N. S., Chargeishvili, M. S., Kadagidze, N. O., Kekelidze, V. D., Kvatadze, R. A., Lomidze, N. L., Melitauri, G. V., Nikobadze, G. I., Pitskhelauri, T. G., Shanidze, R. G., Tatishvili, G. T.
Zdroj: Zeitschrift für Physik C Particles and Fields; December 1990, Vol. 47 Issue: 4 p533-537, 5p
Abstrakt: A search for baryonia with negative and positive strangeness decaying respectively into $$\Lambda + \bar p + pions$$ and $$\bar \Lambda + p + pions$$ has been carried out in a neutron beam with a mean momentum of ?40 GeV/c in an experiment performed at the Serpukhov accelerator. There is a strong indication of the existence of these baryonia. The following four charge states are observed for negative and positive strangeness: neutral, negative, positive and doubly charged. Their mean mass is 3055±25 MeV/c2 and the width G?36±15 MeV/c2. The data show that the isotopic spin of the baryonia is ?3/2. The baryonia production cross sections in the acceptable kinematic regionXF?0.2 andPT?1 GeV/c times the branching ratios of the observed decays are of the order of 1 µb per nucleon.
Databáze: Supplemental Index
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