Production of the charmed baryon Λc+ in neutron-proton interactions

Autor: Vecko, M., Novák, M., Hladký, J., Krásová, J., Aleev, A. N., Arefiev, V. A., Balandin, V. P., Berdyshev, V. K., Birulev, V. K., Chvyrov, A. S., Evsikov, I. I., Grigalashvili, T. S., Guskov, B. N., Hiller, K., Ivanchenko, I. M., Kapishin, M. N., Karpenko, N. N., Kirillov, D. A., Kosarev, I. G., Krastev, V. R., Kuzmin, N. A., Likhachev, M. F., Lyubimov, A. L., Maksimov, A. N., Moisens, P. V., Morozov, A. N., Palchik, V. V., Pose, A. V., Prokeš, A., Silvestrov, L. V., Simonov, V. E., Slepets, L. A., Smižanská, M., Takhtamyshev, G. G., Vlasov, N. V., Klabun, Yu., Nowak, H., Nowak, S., Rysek, H. E., Pelousov, A. S., Devitsin, E. G., Fomenko, A. M., Malinovski, E. I., Pavlovskaya, V. V., Potashov, S. Yu., Rusakov, S. V., Smirnov, P. A., Soloviev, Yu. V., Shtarkov, L. N., Terkulov, A. R., Vazdik, Ya. A., Voichishin, M. N., Zavertyaev, M. V., Chudakov, E. A., Progulova, T. B., Zayachky, V. J., Burilkov, D. T., Markov, P. K., Sultanov, G. G., Todorov, P. T., Trayanov, R. K., Cholakov, V. D., Abashidze, L. I., Abesalashvili, L. N., Amaglobeli, N. S., Chargeishvili, M. S., Dzhordzhadze, V. P., Kadagidze, N. O., Kekelidze, V. D., Kvatadze, R. A., Lomidze, N. L., Melitauri, G. V., Nikobadze, G. I., Pitskchelauri, T. G., Tatashvili, G. T., Shanidze, R. G., Chasnikov, I. Ya., Kamburian, A. F., Loktionov, A. A., Nazarenko, V. D., Potrebenikov, Yu. K., Sliusareva, V. B., Skorobogatova, V. I., Pazonyi, J., Veress, I., Zalán, P., Balea, O., Ponta, T., Petrov, M. V.
Zdroj: Czechoslovak Journal of Physics; March 1989, Vol. 39 Issue: 3 p297-307, 11p
Abstrakt: In this paper we study the inclusive production of the charmed baryon Λc+ in interactions of 40–70 GeV/c neutrons with protons of hydrogen target. The experiment has been performed with the use of magnetic spectrometer BIS-2 located in the neutron beam of Serpukhov accelerator. The signal of Λc+ is observed in the effective mass spectra of Λ°π+π+π−. After the removal of interactions occurring on the container of liquid hydrogen, the signal consists of 14 combinations corresponding to ≈4 standard deviations of background. Its mean value is 2262 MeV/c2, width of the bin containing signal is 20 MeV/c2. On the basis of this signal we determine the value of cross section of Λc+ production times the branching ratio of its observed decay modeσ. Br (Λc+ → Λ°π+π+π−)=0·26±0·11 μb in the kinematic region ofxF>0·5 andpT<1 GeV/c.
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