From 1994 to 1997, the emulsion target of the CHORUS detector was exposed to the wideband neutrino beam of the CERN SPS. In total about 100 000 charged-current neutrino interactions were located in the nuclear emulsion target and fully reconstructed. From this sample of events based on the data acquired by new automatic scanning systems, 2013 charm-decay events were selected by a pattern recognition program. They were confirmed as decays through visual inspection. Based on these events, the effective branching ratio of charmed particles into muons was determined to be B̄μ=[7. 3±0.8(stat)±0.2(syst)]×10-2. In addition, the muonic branching ratios are presented for dominating charm-decay topologies. Normalization of the muonic decays to charged-current interactions provides σμ-μ+/σcc=[3.16±0.34(stat) ±0.09(syst)]×10-3. Selecting only events with visible energy greater than 30 GeV gives a value of B̄μ that is less affected by the charm production threshold and quasi-elastic Λc + production. Combining this value with the current average of B̄μ×|Vcd|2 at the leading order yields the value of |Vcd|LO=0. 236±0.016. © 2005 Elsevier B.V. All rights reserved.
Measurement of topological muonic branching ratios of charmed hadrons produced in neutrino-induced charged-current interactions / A., Kayis Topaksu; G., Onengut; R., Van Dantzig; M., De Jong; R. G. C., Oldeman; M., Guler; U., Kose; P., Tolun; M. G., Catanesi; M. T., Muciaccia; K., Winter; B. V., De Vyver; P., Vilain; G., Wilquet; B., Saitta; E., Di Capua; S., Ogawa; H., Shibuya; I. R., Hristova; T., Kawamura; D., Kolev; H., Meinhard; J., Panman; A., Rozanov; R., Tsenov; J. W. E., Uiterwijk; P., Zucchelli; J., Goldberg; M., Chikawa; J. S., Song; C. S., Yoon; K., Kodama; N., Ushida; S., Aoki; T., Hara; I., Delbar; D., Favart; G., Gregoire; S., Kalinin; I., Makhlioueva; A., Artamonov; P., Gorbunov; V., Khovansky; V., Shamanov; I., Tsukerman; N., Bruski; D., Frekers; K., Hoshino; J., Kawada; M., Komatsu; M., Miyanishi; M., Nakamura; T., Nakano; K., Narita; K., Niu; K., Niwa; N., Nonaka; O., Sato; T., Toshito; S., Buontempo; A. G., Cocco; N., D'Ambrosio; G., De Lellis; G., De Rosa; F., Di Capua; G., Fiorillo; A., Marotta; M., Messina; P., Migliozzi; L. S., Lavina; P., Strolin; V., Tioukov; T., Okusawa; Dore, Ubaldo; Loverre, Pier Ferruccio; L., Ludovici; Rosa, Giovanni; R., Santacesaria; A., Satta; E. R., Spada; E., Barbuto; C., Bozza; G., Grella; G., Romano; C., Sirignano; S., Sorrentino; Y., Sato; I., Tezuka. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 626:1-4(2005), pp. 24-34. [10.1016/j.physletb.2005.08.082]
Measurement of topological muonic branching ratios of charmed hadrons produced in neutrino-induced charged-current interactions
DORE, Ubaldo;LOVERRE, Pier Ferruccio;ROSA, Giovanni;
2005
Abstract
From 1994 to 1997, the emulsion target of the CHORUS detector was exposed to the wideband neutrino beam of the CERN SPS. In total about 100 000 charged-current neutrino interactions were located in the nuclear emulsion target and fully reconstructed. From this sample of events based on the data acquired by new automatic scanning systems, 2013 charm-decay events were selected by a pattern recognition program. They were confirmed as decays through visual inspection. Based on these events, the effective branching ratio of charmed particles into muons was determined to be B̄μ=[7. 3±0.8(stat)±0.2(syst)]×10-2. In addition, the muonic branching ratios are presented for dominating charm-decay topologies. Normalization of the muonic decays to charged-current interactions provides σμ-μ+/σcc=[3.16±0.34(stat) ±0.09(syst)]×10-3. Selecting only events with visible energy greater than 30 GeV gives a value of B̄μ that is less affected by the charm production threshold and quasi-elastic Λc + production. Combining this value with the current average of B̄μ×|Vcd|2 at the leading order yields the value of |Vcd|LO=0. 236±0.016. © 2005 Elsevier B.V. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
