Observation of a New Process with Trimuon Production by High-Energy Neutrinos

Benvenuti, A. C.; Cline, D.; Cooper, P. S.; Heagy, M.; Imlay, R.; Johnson, M.; Ling, T. Y.; Lundy, R.; Mann, A. K.; McIntyre, P.; Mori, Shigeki; Reeder, D.D.; Rich, J.; Rubbia, C.; Stefanski, R. J.; Winn, D.

doi:10.1103/physrevlett.38.1110

Cited by 124 publications

(15 citation statements)

References 17 publications

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“…The experiment has been made possible by grants from our funding agencies: the Institut Interuniversitaire des Sciences Nucléaires and the Interuniversitair Instituut voor Kernwetenschappen (Belgium), 1) We assume that J/Ψ production is 1/6 of the total ccbar production The Israel Science foundation (Grant 328/94) and the Technion Vice President Fund for the Promotion of Research (Israel), CERN (Geneva, Switzerland), the German Bundesministerium für Bildung und Forschung (Grant 057MS12P(0)) (Germany), the Institute of Theoretical and Experimental Physics (Moscow, Russia), the Instituto Nazionale di Fisica Nucleare (Italy), the Promotion and Mutual Aid Corporation for Private Schools of Japan and Japan Society for the Promotion of Science (Japan), the Korea Research Foundation Grant (KRF-99-005-D00004) (Republic of Korea), the Foundation for Fundamental Research on Matter FOM and the National Scientific Research Organization NWO (The Netherlands) and the Scientific and Technical Research Council of Turkey (Turkey).…”

Section: Acknowledgmentsmentioning

confidence: 99%

“…In early neutrino experiments at the CERN SPS and Fermilab, measurements of production rates of prompt trimuons [1] and like-sign dimuons ( [2], [3] and [4]) were found to be higher than expected [5]. In the past the origin of these events was assumed to be the associated charm production in CC neutrino interactions with subsequent muonic decay of the charmed particle(s):…”

Section: Introductionmentioning

confidence: 99%

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Associated charm production in neutrino–nucleus interactions

Topaksu¹,

Önengüt²,

Dantzig³

et al. 2007

Eur. Phys. J. C

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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 130,000 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(ccν)/σ DIS NC = (3.62−2.42 (stat) ± 0.54(syst)) × 10 −3 has been measured. One event with two charm decays has been observed in charged-current ν µ 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(ccµ − )/σ CC < 9.69 × 10 −4 .

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Section: Acknowledgmentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Associated charm production in neutrino–nucleus interactions

Topaksu¹,

Önengüt²,

Dantzig³

et al. 2007

Eur. Phys. J. C

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“…В этой модели и других подобных ей недоста-точно наличия τ, требуется еще больше лептонов (кварков). В связи с этим, напомним, что предварительные экспериментальные указания на существование добавочных тяжелых лептонов уже появились 88 < 89 . Приведенные примеры показывают, что в настоящий момент сущест-вует серьезный произвол в построении моделей, и лишний раз демонст-рируют недостаточность наших представлений о слабом взаимодействии.…”

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New particle in e+e– annihilation: the heavy lepton τ±

Azimov¹,

Frankfurt²,

Khoze³

1978

Usp. Fiz. Nauk

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“…In the past, results on the cross-section for process (1) have been obtained by estimating the production rates of prompt trimuons [1] and like-sign dimuons ( [2,3]). The underlying assumption was that the µ + µ − pair or the µ − , observed in addition to the leading µ − , was produced by the muonic decay of charmed hadrons.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the process is of the type (1) ν µ N → µ − ccX in which the charm-anticharm pair is produced by a gluon emitted via bremsstrahlung from a light parton.…”

Section: Introductionmentioning

confidence: 99%

Observation of one event with the characteristics of associated charm production in neutrino charged-current interactions

et al. 2002

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We report on a search for associated charm production in neutrino charged-current interactions in the CHORUS experiment, based on the visual observation of charmed-particle decays. The search differs from those carried out so far in which the production of cc has been inferred from measurements of events with two or three muons in the final state, resulting from the decay of charmed hadrons. One event with a double charm-decay topology has been found and a corresponding background of 0.04 events has been evaluated. 

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Observation of a New Process with Trimuon Production by High-Energy Neutrinos

Cited by 124 publications

References 17 publications

Associated charm production in neutrino–nucleus interactions

Associated charm production in neutrino–nucleus interactions

New particle in e<sup>+</sup>e<sup>– </sup>annihilation: the heavy lepton τ<sup>±</sup>

Observation of one event with the characteristics of associated charm production in neutrino charged-current interactions

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