Cross-section measurement for quasi-elastic production of charmed baryons in νN interactions

Kayis Topaksu, A.; Onengüt, G.; Van Dantzig, R.; De Jong, M.; Melzer, O.; Oldeman, R. G. C.; Pesen, E.; Spada, F. R.; Visschers, J. L.; Güler, M.; Köse, U.; Serin Zeyrek, M.; Sever, R.; Tolun, P.; Zeyrek, M. T.; Catanesi, M. G.; De Serio, M.; Ieva, M.; Muciaccia, M. T.; Radicioni, E.; Simone, S.; Bülte, A.; Winter, K.; Van De Vyver, B.; Vilain, P.; Wilquet, G.; Pittoni, G. L.; Saitta, B.; Di Capua, E.; Ogawa, S.; Shibuya, H.; Artamonov, A.; Chizhov, M.; Doucet, M.; Hristova, I. R.; Kawamura, T.; 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.; Tsukerman, I.; Bruski, N.; Frekers, D.; Hoshino, K.; Kawada, J.; Komatsu, M.; Miyanishi, M.; Nakamura, M.; Nakano, T.; Narita, K.; Niu, K.; Niwa, K.; Nonaka, N.; Sato, O.; Toshito, T.; Buontempo, S.; Cocco, A. G.; D'Ambrosio, N.; De Lellis, G.; De Rosa, G.; Di Capua, Francesco; Ereditato, A.; Fiorillo, Giuliana; 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.

doi:10.1016/j.physletb.2003.09.056

A study of quasi-elastic production of charmed baryons in charged-current interactions of neutrinos with the nuclear emulsion target of CHORUS is presented. In a sample of about 46 000 interactions located in the emulsion, candidates for decays of short-lived particles were identified by using new automatic scanning systems and later confirmed through visual inspection. Criteria based both on the topological and kinematical characteristics of quasi-elastic charm production allowed a clear separation between events of this type and those in which charm is produced in deep inelastic processes. A final sample containing 13 candidates consistent with quasi-elastic production of a charmed baryon with an estimated background of 1.7 events was obtained. At the average neutrino energy of 27 GeV the cross-section for the total quasi-elastic production of charmed baryons relative to the νN charged-current cross-section was measured to be σ(QE)/σ(CC) = (0.23-0.06 +0.02(stat)×10-2. Through an analysis of the topology at the production and decay vertices the relative cross-sections were measured separately for singly (Λc +, ∑c +, ∑c +*) and doubly (∑c ++, ∑ c ++*) charged baryons.

Cross-section measurement for quasi-elastic production of charmed baryons in νN interactions / Kayis Topaksu, A., Onengüt, G., van Dantzig, R., de Jong, M., Melzer, O., Oldeman, R.G.C., Pesen, E., Spada, F.R., Visschers, J.L., Güler, M., Köse, U., Serin Zeyrek, M., Sever, R., Tolun, P., Zeyrek, M.T., Catanesi, M.G., De Serio, M., Ieva, M., Muciaccia, M.T., Radicioni, E., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 575:3-4(2003), pp. 198-207. [10.1016/j.physletb.2003.09.056]