Production of the charmed baryon Λc + in neutron-proton interactions - BIS-2 collaboration

M. Vecko, M. Novák, J. Hladký, J. Krásová, A. N. Aleev, V. A. Arefiev, V. P. Balandin, V. K. Berdyshev, V. K. Birulev, A. S. Chvyrov, I. I. Evsikov, T. S. Grigalashvili, B. N. Guskov, K. Hiller, I. M. Ivanchenko, M. N. Kapishin, N. N. Karpenko, D. A. Kirillov, I. G. Kosarev, V. R. KrastevN. A. Kuzmin, M. F. Likhachev, A. L. Lyubimov, A. N. Maksimov, P. V. Moisens, A. N. Morozov, V. V. Palchik, A. V. Pose, A. Prokeš, L. V. Silvestrov, V. E. Simonov, L. A. Slepets, M. Smižanská, G. G. Takhtamyshev, N. V. Vlasov, Yu Klabun, H. Nowak, S. Nowak, H. E. Rysek, A. S. Pelousov, E. G. Devitsin, A. M. Fomenko, E. I. Malinovski, V. V. Pavlovskaya, S. Yu Potashov, S. V. Rusakov, P. A. Smirnov, Yu V. Soloviev, L. N. Shtarkov, A. R. Terkulov, Ya A. Vazdik, M. N. Voichishin, M. V. Zavertyaev, E. A. Chudakov, T. B. Progulova, V. J. Zayachky, D. T. Burilkov, P. K. Markov, G. G. Sultanov, P. T. Todorov, R. K. Trayanov, V. D. Cholakov, L. I. Abashidze, L. N. Abesalashvili, N. S. Amaglobeli, M. S. Chargeishvili, V. P. Dzhordzhadze, N. O. Kadagidze, V. D. Kekelidze, R. A. Kvatadze, N. L. Lomidze, G. V. Melitauri, G. I. Nikobadze, T. G. Pitskchelauri, G. T. Tatashvili, R. G. Shanidze, I. Ya Chasnikov, A. F. Kamburian, A. A. Loktionov, V. D. Nazarenko, Yu K. Potrebenikov, V. B. Sliusareva, V. I. Skorobogatova, J. Pazonyi, I. Veress, P. Zalán, O. Balea, T. Ponta, M. V. Petrov

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Abstract

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 mode σ. Br (Λc + → Λ°π+π+π-)=0·26±0·11 μb in the kinematic region of xF>0·5 and pT<1 GeV/c.

Original languageEnglish
Pages (from-to)297-307
Number of pages11
JournalCzechoslovak Journal of Physics
Volume39
Issue number3
DOIs
Publication statusPublished - Mar 1989

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

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., ... Petrov, M. V. (1989). Production of the charmed baryon Λc + in neutron-proton interactions - BIS-2 collaboration. Czechoslovak Journal of Physics, 39(3), 297-307. https://doi.org/10.1007/BF01597781