Photoproduction of the Λc charmed baryon

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ID: 269353
1990
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Abstract
In a photoproduction experiment using a mean photon energy of 100 GeV we have observed 29±8 Λc(Λc) charmed-baryon and antibaryon decays in the pK−π+ (pK+π−) final state. Quasi two-body final states do not contribite significantly to this channel. The mass of the Λc was measured to be 2281.7±2.7±2.6 MeV/c2 and its lifetime 0.18±0.03±0.03 ps. The ratio of ΛcD production, measured in this experiment, is significantly greater than that predicted by photon-gluon fusion and using a Lund model to describe the hadronization. This excess cannot be completely accounted for in this model, even using a Λc branching fraction in pKπ as high as 5%.
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Authors M.P. Alvarez, R. Barate, D. Bloch, P. Bonamy, P. Borgeaud, Mark Burchell, H. Burmeister, J.M. Brunet, Francisco Calvino, Marco Cattaneo, J.M. Crespo, B. D'Almagne, M. David, L. DiCiaccio, J. Dixon, P. Druet, A. Duane, J.P. Engel, A. Ferrer, T.A. Filippas, E. Fokitis, R.W. Forty, P. Foucault, E.N. Gazis, J.P. Gerber, Y. Giomataris, T. Hofmokl, E.C. Katsoufis, M. Koratzinos, C. Krafft, B. Lefievre, Y. Lemoigne, A. Lopez, W.K. Lui, C. Magneville, A. Maltezos, J.G. McEwen, Th. Papadopoulou, B. Pattison, D. Poutot, M. Primout, H. Rahmani, P. Roudeau, C. Seez, J. Six, R. Strub, D. Treille, P. Triscos, G. Tristram, G. Villet, A. Volte, M. Wayne, D.M. Websdale, G. Wormser, Y. Zolnierowski
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Journal physics letters b
Year 1990
DOI
10.1016/0370-2693(90)91342-9
URL
https://sciprofiles.com/publication/view/e78665ce7f5df31e27a6097e8d586302
Keywords
branching photon charmed photoproduction baryon pkπ

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