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Kayis-Topaksu, A; Onengüt, G; van Dantzig, R; Oldeman, R.G.C; Pesen, E; Visschers, J.L; Güler, M; Köse, U; Serin-Zeyrek, M; Sever, R; Tolun, P; Zeyrek, M.T; Armenise, N; Catanesi, M.G; De Serio, M; Ieva, M; Muciaccia, M.T; Simone, S; Bülte, A; Winter, K; El-Aidi, R; Van de Vyver, B; Vilain, P; Wilquet, G; Di Capua, E; Ogawa, S; Artamonov, A; Chizhov, M; Doucet, M; Hristova, I.R; Kolev, D; Meinhard, H; Panman, J; Papadopoulos, I.M; Ricciardi, S; Rozanov, A; Tsenov, R; Uiterwijk, J.W.E; Zucchelli, P; Goldberg, J; Chikawa, M; Arik, E; Song, J.S; Yoon, C.S; Kodama, K; Ushida, N; Aoki, S; Hara, T; Delbar, T; Favart, D; Grégoire, G; Kalinin, S; Maklioueva, I; Gorbunov, P; Khovansky, V; Shamanov, V; Bruski, N; Frekers, D; Kawada, J; Komatsu, M; Miyanishi, M; Nakamura, M; Nakano, T; Narita, K; Niu, K; Niwa, K; Nonaka, N; Toshito, T; Buontempo, S; Cocco, A.G; D'Ambrosio, N; De Lellis, G; De Rosa, G; Di Capua, F; Ereditato, A; Fiorillo, G; Marotta, A; Messina, M; Migliozzi, P; Pistillo, C; Scotto Lavina, L; Strolin, P; Tioukov, V; Nakamura, K; Okusawa, T; Dore, U; Loverre, P.F; Ludovici, L; Righini, P; Rosa, G; Santacesaria, R; Satta, A; Barbuto, E; Bozza, C; Grella, G; Romano, G; Sirignano, C; Sorrentino, S; Sato, Y; Tezuka, I
Physics letters. B, 03/2003, Letnik: 555, Številka: 3-4Journal Article
A measurement of Λc+ production in neutrino nucleon charged-current interactions is presented. In a subsample of about 50000 interactions located in the emulsion target of the CHORUS detector, exposed to the wide band neutrino beam of the CERN SPS, candidates for decays of short-lived particles were identified using new automatic scanning systems and later confirmed through visual inspection. Criteria based on the flight length allowed a statistical separation among the different charm species thus enabling a sample particularly rich in Λc+ to be defined. At an average neutrino energy of 27 GeV, the product σ(Λc+)/σ(CC)×BR(Λc+→3p) was measured to be (0.37±0.10(stat)±0.02(syst))×10−2, while the values of (1.54±0.35(stat)±0.18(syst))×10−2 and of 0.24±0.07(stat)±0.04(syst) were obtained for σ(Λc+)/σ(CC) and BR(Λc+→3p), respectively.
