A proton beam-dump experiment using the CHARM neutrino detector has been performed at the CERN SPS. We report the observation of events induced by prompt νμ neutrinos and confirm previous evidence for prompt electron neutrinos. The ratio of prompt (νe + νe) and (νμ+νμ) fluxes is found to be 0.48+/-0.12 (st atistical) +/- 0.10 (systematic), whereas a flux ratio of 1 is expected for charmed meson production and subsequent semileptonic decay. The νμ to νμ flux ratio obtained is 1.3-0.6+6. We also observe 54 +/- 19 (statistical) +/- 9 (systematic) promp t muonless events, with shower energy in the range from 2 to 20 GeV, in excess of electron and muon neutrino interactions expected from D and D meson decay.

Experimental Study of Prompt Neutrino Production in 400 GeV Proton-Nucleus Collisions / M., Jonker; J., Panman; F., Udo; J. V., Allaby; U., Amaldi; G., Barbiellini; A., Baroncelli; V., Blobel; W., Flegel; W., Kozanecki; K. H., Mess; M., Metcalf; J., Meyer; R. S., Orr; F., Schneider; V., Valente; A. M., Wetherell; K., Winter; F. W., Busser; P. D., Gall; H., Grote; B., Kroger; E., Metz; F., Niebergall; K. H., Ranitzsch; P., Stahelin; P., Gorbunov; E., Grigoriev; V., Kaftanov; V., Khovansky; A., Rosanov; R., Biancastelli; Borgia, Bruno; C., Bosio; Capone, Antonio; Ferroni, Fernando; Longo, Egidio; P., Monacelli; F., De Notaristefani; P., Pistilli; C., Santoni. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 96:3-4(1980), pp. 435-442. [10.1016/0370-2693(80)90803-5]

Experimental Study of Prompt Neutrino Production in 400 GeV Proton-Nucleus Collisions

BORGIA, BRUNO;CAPONE, Antonio;FERRONI, Fernando;LONGO, Egidio;
1980

Abstract

A proton beam-dump experiment using the CHARM neutrino detector has been performed at the CERN SPS. We report the observation of events induced by prompt νμ neutrinos and confirm previous evidence for prompt electron neutrinos. The ratio of prompt (νe + νe) and (νμ+νμ) fluxes is found to be 0.48+/-0.12 (st atistical) +/- 0.10 (systematic), whereas a flux ratio of 1 is expected for charmed meson production and subsequent semileptonic decay. The νμ to νμ flux ratio obtained is 1.3-0.6+6. We also observe 54 +/- 19 (statistical) +/- 9 (systematic) promp t muonless events, with shower energy in the range from 2 to 20 GeV, in excess of electron and muon neutrino interactions expected from D and D meson decay.
1980
01 Pubblicazione su rivista::01a Articolo in rivista
Experimental Study of Prompt Neutrino Production in 400 GeV Proton-Nucleus Collisions / M., Jonker; J., Panman; F., Udo; J. V., Allaby; U., Amaldi; G., Barbiellini; A., Baroncelli; V., Blobel; W., Flegel; W., Kozanecki; K. H., Mess; M., Metcalf; J., Meyer; R. S., Orr; F., Schneider; V., Valente; A. M., Wetherell; K., Winter; F. W., Busser; P. D., Gall; H., Grote; B., Kroger; E., Metz; F., Niebergall; K. H., Ranitzsch; P., Stahelin; P., Gorbunov; E., Grigoriev; V., Kaftanov; V., Khovansky; A., Rosanov; R., Biancastelli; Borgia, Bruno; C., Bosio; Capone, Antonio; Ferroni, Fernando; Longo, Egidio; P., Monacelli; F., De Notaristefani; P., Pistilli; C., Santoni. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 96:3-4(1980), pp. 435-442. [10.1016/0370-2693(80)90803-5]
File allegati a questo prodotto
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/245330
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 53
  • ???jsp.display-item.citation.isi??? ND
social impact