CERN Accelerating science

Article
Report number arXiv:0708.2820 ; CERN-PH-EP-2007-031 ; CERN-PH-EP-2007-031
Title Associated Charm Production in Neutrino-Nucleus Interactions
Author(s) CHORUS Collaboration  Εμφάνιση και των 86 συγγραφέων
Affiliation (Cukurova University, Adana, Turkey) ; (NIKHEF, Amsterdam, The Netherlands) ; (METU, Ankara, Turkey) ; (Universita di Bari and INFN, Bari, Italy) ; (Humboldt U., Berlin) ; (Inter-University Institute for High Energies (ULB-VUB) Brussels, Belgium) ; (Universita di Cagliari and INFN, Cagliari, Italy) ; (Universita di Ferrara and INFN, Ferrara, Italy) ; (Toho University, Funabashi, Japan) ; (Technion Haifa Israel) ; (Kinki University, Higashiosaka, Japan) ; (Gyeongsang National University Jinju Korea) ; (Aichi University of Education, Kariya, Japan) ; (Kobe University, Kobe, Japan) ; (Universite Catholique de Louvain, Louvain-la-Neuve, Belgium) ; (Institute for Theoretical and Experimental Physics Moscow, Russian Federation) ; (Westfalische Wilhelms-Universit Munster, Germany) ; (Nagoya University, Nagoya, Japan) ; (Universita Federico and INFN, Naples, Italy) ; (Osaka City University, Osaka, Japan) ; (Universita La Sapienza and INFN, Rome, Italy) ; (Universita di Salerno and INFN, Salerno, Italy) ; (Utsunomiya University, Utsunomiya, Japan)
Publication 2007
Imprint 21 Aug 2007
Number of pages 14
Note 10 pages, 4 figures
In: Eur. Phys. J. C 52 (2007) 543-552
DOI 10.1140/epjc/s10052-007-0410-8
Subject category Particle Physics - Experiment
Accelerator/Facility, Experiment CERN SPS ; CHORUS WA95
Abstract In this paper a search for associated charm production both in neutral and charged current νν-nucleus interactions is presented. The improvement of automatic scanning systems in the {CHORUS} experiment allows an efficient search to be performed in emulsion for short-lived particles. Hence a search for rare processes, like the associated charm production, becomes possible through the observation of the double charm-decay topology with a very low background. About 130,000 νν interactions located in the emulsion target have been analysed. Three events with two charm decays have been observed in the neutral-current sample with an estimated background of 0.18±±0.05. The relative rate of the associated charm cross-section in deep inelastic νν interactions, σ(cˉcν)/σDISNC=(3.62+2.952.42(stat)±0.54(syst))×103σ(c¯cν)/σDISNC=(3.62+2.952.42(stat)±0.54(syst))×103 has been measured. One event with two charm decays has been observed in charged-current νμ interactions with an estimated background of 0.18±0.06 and the upper limit on associated charm production in charged-current interactions at 90% C.L. has been found to be σ(cˉcμ)/σCC<9.69×104.



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 Δημιουργία εγγραφής 2007-08-22, τελευταία τροποποίηση 2024-10-27


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