In this paper a search for associated charm production both in neutral and charged current ν-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 130000 ν 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 ν interactions, σ(cc ν)/σNC DIS=(3.62+2.95 -2.42(stat)±0.54(syst))×10-3 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(cc μ-)/σCC<9.69×10-4.

Associated charm production in neutrino–nucleus interactions / Kayis Topaksu, A., Önengüt, G., van Dantzig, R., de Jong, M., Oldeman, R.G.C., Güler, M., Köse, U., Tolun, P., Catanesi, M.G., Muciaccia, M.T., Winter, K., Van de Vyver, B., Vilain, P., Wilquet, G., Saitta, B., Di Capua, E., Ogawa, S., Shibuya, H., Hristova, I.R., Kawamura, T., et al.. - In: THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS. - ISSN 1434-6044. - 52:3(2007), pp. 543-552. [10.1140/epjc/s10052-007-0410-8]

Associated charm production in neutrino–nucleus interactions

DI CAPUA, FRANCESCO;
2007

Abstract

In this paper a search for associated charm production both in neutral and charged current ν-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 130000 ν 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 ν interactions, σ(cc ν)/σNC DIS=(3.62+2.95 -2.42(stat)±0.54(syst))×10-3 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(cc μ-)/σCC<9.69×10-4.
2007
Associated charm production in neutrino–nucleus interactions / Kayis Topaksu, A., Önengüt, G., van Dantzig, R., de Jong, M., Oldeman, R.G.C., Güler, M., Köse, U., Tolun, P., Catanesi, M.G., Muciaccia, M.T., Winter, K., Van de Vyver, B., Vilain, P., Wilquet, G., Saitta, B., Di Capua, E., Ogawa, S., Shibuya, H., Hristova, I.R., Kawamura, T., et al.. - In: THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS. - ISSN 1434-6044. - 52:3(2007), pp. 543-552. [10.1140/epjc/s10052-007-0410-8]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/667829
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