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

被引：365
作者：
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
机构：
[1] Argonne Natl Lab, Argonne, IL 60439 USA
[2] Univ Minnesota, Minneapolis, MN 55455 USA
[3] Univ Oxford, Dept Phys, Oxford OX1 3RH, England
[4] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England
[5] Tufts Univ, Medford, MA 02155 USA
[6] Western Washington Univ, Bellingham, WA 98225 USA
来源：
PHYSICS LETTERS B | 1999年 / 449卷 / 1-2期
关键词：
D O I：
10.1016/S0370-2693(99)00056-8
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
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 fiducial 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 checked 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 Elsevier Science B.V. All rights reserved.
引用
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页码：137 / 144
页数：8
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