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Titolo:
MEASUREMENT OF THE ATMOSPHERIC NEUTRINO-INDUCED UPGOING MUON FLUX USING MACRO
Autore:
AMBROSIO M; ANTOLINI R; ARAMO C; AURIEMMA G; BALDINI A; BARBARINO GC; BARISH BC; BATTISTONI G; BELLOTTI R; BEMPORAD C; BERNARDINI P; BILOKON H; BISI V; BLOISE C; BOWER C; BUSSINO S; CAFAGNA F; CALICCHIO M; CAMPANA D; CARBONI M; CASTELLANO M; CECCHINI S; CEI F; CHIARELLA V; CHOUDHARY BC; COUTU S; DEBENEDICTIS L; DECATALDO G; DEKHISSI H; DEMARZO C; DEMITRI I; DERKAOUI J; DEVINCENZI M; DICREDICO A; ERRIQUEZ O; FAVUZZI C; FORTI C; FUSCO P; GIACOMELLI G; GIANNINI G; GIGLIETTO N; GIORGINI M; GRASSI M; GRAY L; GRILLO A; GUARINO F; GUARNACCIA P; GUSTAVINO C; HABIG A; HANSON K; HAWTHORNE A; HEINZ R; HUANG Y; IAROCCI E; KATSAVOUNIDIS E; KATSAVOUNIDIS I; KEARNS E; KIM H; KYRIAZOPOULOU S; LAMANNA E; LANE C; LEVIN DS; LIPARI P; LONGLEY NP; LONGO MJ; MAAROUFI F; MANCARELLA G; MANDRIOLI G; MANZOOR S; NERI AM; MARINI A; MARTELLO D; MARZARICHIESA A; MAZZIOTTA MN; MAZZOTTA C; MICHAEL DG; MIKHEYEV S; MILLER L; MONACELLI P; MONTARULI T; MONTENO M; MUFSON S; MUSSER J; NICOLO D; NOLTY R; OKADA C; ORTH C; OSTERIA G; OUCHRIF M; PALAMARA O; PATERA V; PATRIZII L; PAZZI R; PECK CW; PETRERA S; PISTILLI P; POPA V; PUGLIESE V; RAINO A; REYNOLDSON J; RONGA F; RUBIZZO U; SANZGIRI A; SATRIANO C; SATTA L; SCAPPARONE E; SCHOLBERG K; SCIUBBA A; SERRALUGARESI P; SEVERI M; SIOLI M; SITTA M; SPINELLI P; SPINETTI M; SPURIO M; STEINBERG R; STONE JL; SULAK LR; SURDO A; TARLE G; TOGO V; UGOLOTTI D; VAKILI M; WALTER CW; WEBB R;
Indirizzi:
UNIV NAPLES,DIPARTIMENTO FIS I-80125 NAPLES ITALY INFN I-80125 NAPLES ITALY UNIV BARI,DIPARTMENTO FIS I-70126 BARI ITALY INFN I-70126 BARI ITALY UNIV BOLOGNA,DIPARTMENTO FIS I-40126 BOLOGNA ITALY INFN I-40126 BOLOGNA ITALY BOSTON UNIV,DEPT PHYS BOSTON MA 02215 CALTECH PASADENA CA 91125 DREXEL UNIV,DEPT PHYS PHILADELPHIA PA 19104 IST NAZL FIS NUCL,LAB NAZL FRASCATI I-00044 FRASCATI ROMA ITALY INFN,LAB NAZL GRAN SASSO I-67010 ASSERGI LAQUILA ITALY INDIANA UNIV,DEPT PHYS BLOOMINGTON IN 47405 INDIANA UNIV,DEPT ASTRON BLOOMINGTON IN 47405 UNIV AQUILA,DIPARTIMENTO FIS I-67100 LAQUILA ITALY INFN I-67100 LAQUILA ITALY UNIV LECCE,DIPARTIMENTO FIS I-73100 LECCE ITALY INFN I-73100 LECCE ITALY UNIV MICHIGAN,DEPT PHYS ANN ARBOR MI 48109 UNIV NAPLES,DIPARTIMENTO FIS I-80125 NAPLES ITALY IST NAZL FIS NUCL I-56010 PISA ITALY UNIV PISA,DIPARTIMENTO FIS I-56010 PISA ITALY UNIV ROMA LA SAPIENZA,DIPARTIMENTO FIS I-00185 ROME ITALY INFN I-00185 ROME ITALY TEXAS A&M UNIV,DEPT PHYS COLLEGE STN TX 77843 UNIV TURIN,DIPARTIMENTO FIS SPERIMENTALE I-10125 TURIN ITALY INFN I-10125 TURIN ITALY UNIV MOHAMED I,FAC SCI OUJDA MOROCCO IST NAZL FIS NUCL I-95129 CATANIA ITALY UNIV BASILICATA I-85100 POTENZA ITALY IST NAZL FIS NUCL I-20133 MILAN ITALY CNR,IST TESRE I-40129 BOLOGNA ITALY PENN STATE UNIV,DEPT PHYS UNIVERSITY PK PA 16801 UNIV ROMA TRE,DIPARTIMENTO FIS ROME ITALY UNIV TRIESTE I-34100 TRIESTE ITALY INFN I-34100 TRIESTE ITALY UNIV ROME,DIPARTIMENTO ENERGET I-00185 ROME ITALY RUSSIAN ACAD SCI,INST NUCL RES MOSCOW 117312 RUSSIA SCUOLA NORMALE SUPER PISA I-56010 PISA ITALY INST SPACE SCI BUCHAREST ROMANIA
Titolo Testata:
Physics letters. Section B
fascicolo: 3-4, volume: 434, anno: 1998,
pagine: 451 - 457
SICI:
0370-2693(1998)434:3-4<451:MOTANU>2.0.ZU;2-L
Fonte:
ISI
Lingua:
ENG
Soggetto:
GRAN-SASSO; DETECTOR; SEARCH;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
38
Recensione:
Indirizzi per estratti:
Citazione:
M. Ambrosio et al., "MEASUREMENT OF THE ATMOSPHERIC NEUTRINO-INDUCED UPGOING MUON FLUX USING MACRO", Physics letters. Section B, 434(3-4), 1998, pp. 451-457

Abstract

We present a measurement of the flux of neutrino-induced upgoing muons (< E-nu > similar to 100 GeV) using the MACRO detector. The ratio ofthe number of observed to expected events integrated over all zenith angles is 0.74 +/- 0.036 (stat) +/- 0.046 (systematic) +/- 0.13 (theoretical). The observed zenith distribution for - 1.0 less than or equalto cos theta less than or equal to -0.1 does not fit well with the nooscillation expectation, giving a maximum probability for chi(2) Of 0.1%, The acceptance of the detector has been extensively studied usingdowngoing muons, independent analyses and Monte Carlo simulations. The other systematic uncertainties cannot be the source of the discrepancies between the data and expectations. We have investigated whether the observed number of events and the shape of the zenith distribution can be explained by a neutrino oscillation hypothesis. Fitting either the flux or zenith distribution independently yields mixing parametersof sin(2)2 theta = 1.0 and Delta m(2) of a few times 10(-3) eV(2). However, the observed zenith distribution does not fit well with any expectations, giving a maximum probability for chi(2) of 5% for the beat oscillation hypothesis, and the combined probability for the shape andnumber of events is 17%. We conclude that these data favor a neutrinooscillation hypothesis, but with unexplained structure in the zenith distribution not easily explained by either the statistics or systematics of the experiment. (C) 1998 Published by Elsevier Science B.V. Allrights reserved.

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Documento generato il 01/12/20 alle ore 08:22:36