ITA
ENG

The atmospheric neutrino flavor ratio from a 3.9 fiducial kiloton-year exposure of Soudan 2

Authors

Allison, WWM Alner, GJ Ayres, DS Barr, G Barrett, WL Bode, C Border, PM Brooks, CB Cobb, JH Cotton, RJ Courant, H Demuth, DM Fields, TH Gallagher, HR Garcia-Garcia, C Goodman, MC Gran, R Joffe-Minor, T Kafka, T Kasahara, SMS Leeson, W Litchfield, PJ Longley, NP Mann, WA Marshak, ML Milburn, RH Miller, WH Mualem, L Napier, A Oliver, WP Pearce, GF Peterson, EA Petyt, DA Price, LE Ruddick, K Sanchez, M Schneps, J Schub, MH Seidlein, R Stassinakis, A Thron, JL Vassiliev, V Villaume, G Wakely, S Wall, D West, N Wielgosz, UM

Citation

Wwm. Allison et al., The atmospheric neutrino flavor ratio from a 3.9 fiducial kiloton-year exposure of Soudan 2, PHYS LETT B, 449(1-2), 1999, pp. 137-144

Citations number

Categorie Soggetti

Physics

Journal title

PHYSICS LETTERS B

ISSN journal

03702693 → ACNP

Volume

449

Issue

1-2

Year of publication

1999

Pages

137 - 144

Database

ISI

SICI code

0370-2693(19990304)449:1-2<137:TANFRF>2.0.ZU;2-5

Abstract

We report a measurement of the atmospheric neutrino flavor ratio, R, using a sample of quasi-elastic neutrino interactions occurring in an iron medium . The flavor ratio (tracks/showers) of atmospheric neutrinos in a 3.9 fiduc ial kiloton-year exposure of Soudan 2 is 0.64 +/- 0.11(stat.) +/- 0.06(syst .) of that expected. Important aspects of our main analysis have been check ed by carrying out two independent, alternative analyses; one is based upon automated scanning, the other uses a multivariate approach for background subtraction. Similar results are found by all three approaches. (C) 1999 El sevier Science B.V. All rights reserved.