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Title: Charge-separated atmospheric neutrino-induced muons in the MINOS far detector

Abstract

We found 140 neutrino-induced muons in 854.24 live days in the MINOS far detector, which has an acceptance for neutrino-induced muons of 6.91x10{sup 6} cm{sup 2} sr. We looked for evidence of neutrino disappearance in this data set by computing the ratio of the number of low momentum muons to the sum of the number of high momentum and unknown momentum muons for both data and Monte Carlo expectation in the absence of neutrino oscillations. The ratio of data and Monte Carlo ratios, R, is R=0.65{sub -0.12}{sup +0.15}(stat){+-}0.09(syst), a result that is consistent with an oscillation signal. A fit to the data for the oscillation parameters sin{sup 2}2{theta}{sub 23} and {delta}m{sub 23}{sup 2} excludes the null oscillation hypothesis at the 94% confidence level. We separated the muons into {mu}{sup -} and {mu}{sup +} in both the data and Monte Carlo events and found the ratio of the total number of {mu}{sup -} to {mu}{sup +} in both samples. The ratio of those ratios, R-circumflex{sub CPT}, is a test of CPT conservation. The result R-circumflex{sub CPT}=0.72{sub -0.18}{sup +0.24}(stat){sub -0.04}{sup +0.08}(syst) is consistent with CPT conservation.

Authors:
 [1];  [2]; ; ; ; ; ;  [3]; ; ; ; ; ; ; ; ; ; ; ; more »;  [4] « less
  1. Fermi National Accelerator Laboratory, Batavia, Illinois 60510 (United States)
  2. (United Kingdom)
  3. Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire, OX11 0QX (United Kingdom)
  4. University of Minnesota, Minneapolis, Minnesota 55455 (United States) (and others)
Publication Date:
OSTI Identifier:
21020460
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 75; Journal Issue: 9; Other Information: DOI: 10.1103/PhysRevD.75.092003; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; MONTE CARLO METHOD; MULTIPARTICLE SPECTROMETERS; MUON DETECTION; MUONS MINUS; MUONS PLUS; NEUTRINO DETECTION; NEUTRINO OSCILLATION; NEUTRINO REACTIONS; NEUTRINOS; PARTICLE DISCRIMINATION; STANDARD MODEL; WEINBERG ANGLE

Citation Formats

Adamson, P., Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, Andreopoulos, C., Belias, A., Durkin, T., Hartnell, J., Nicholls, T. C., Pearce, G. F., Arms, K. E., Becker, B. R., Border, P. M., Gogos, J., Heller, K., Kasahara, S. M. S., Kumaratunga, S., Litchfield, P. J., Marshak, M. L., Meier, J. R., Miller, W. H., Peterson, E. A., and Petyt, D. A. Charge-separated atmospheric neutrino-induced muons in the MINOS far detector. United States: N. p., 2007. Web. doi:10.1103/PHYSREVD.75.092003.
Adamson, P., Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, Andreopoulos, C., Belias, A., Durkin, T., Hartnell, J., Nicholls, T. C., Pearce, G. F., Arms, K. E., Becker, B. R., Border, P. M., Gogos, J., Heller, K., Kasahara, S. M. S., Kumaratunga, S., Litchfield, P. J., Marshak, M. L., Meier, J. R., Miller, W. H., Peterson, E. A., & Petyt, D. A. Charge-separated atmospheric neutrino-induced muons in the MINOS far detector. United States. doi:10.1103/PHYSREVD.75.092003.
Adamson, P., Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, Andreopoulos, C., Belias, A., Durkin, T., Hartnell, J., Nicholls, T. C., Pearce, G. F., Arms, K. E., Becker, B. R., Border, P. M., Gogos, J., Heller, K., Kasahara, S. M. S., Kumaratunga, S., Litchfield, P. J., Marshak, M. L., Meier, J. R., Miller, W. H., Peterson, E. A., and Petyt, D. A. Tue . "Charge-separated atmospheric neutrino-induced muons in the MINOS far detector". United States. doi:10.1103/PHYSREVD.75.092003.
@article{osti_21020460,
title = {Charge-separated atmospheric neutrino-induced muons in the MINOS far detector},
author = {Adamson, P. and Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT and Andreopoulos, C. and Belias, A. and Durkin, T. and Hartnell, J. and Nicholls, T. C. and Pearce, G. F. and Arms, K. E. and Becker, B. R. and Border, P. M. and Gogos, J. and Heller, K. and Kasahara, S. M. S. and Kumaratunga, S. and Litchfield, P. J. and Marshak, M. L. and Meier, J. R. and Miller, W. H. and Peterson, E. A. and Petyt, D. A.},
abstractNote = {We found 140 neutrino-induced muons in 854.24 live days in the MINOS far detector, which has an acceptance for neutrino-induced muons of 6.91x10{sup 6} cm{sup 2} sr. We looked for evidence of neutrino disappearance in this data set by computing the ratio of the number of low momentum muons to the sum of the number of high momentum and unknown momentum muons for both data and Monte Carlo expectation in the absence of neutrino oscillations. The ratio of data and Monte Carlo ratios, R, is R=0.65{sub -0.12}{sup +0.15}(stat){+-}0.09(syst), a result that is consistent with an oscillation signal. A fit to the data for the oscillation parameters sin{sup 2}2{theta}{sub 23} and {delta}m{sub 23}{sup 2} excludes the null oscillation hypothesis at the 94% confidence level. We separated the muons into {mu}{sup -} and {mu}{sup +} in both the data and Monte Carlo events and found the ratio of the total number of {mu}{sup -} to {mu}{sup +} in both samples. The ratio of those ratios, R-circumflex{sub CPT}, is a test of CPT conservation. The result R-circumflex{sub CPT}=0.72{sub -0.18}{sup +0.24}(stat){sub -0.04}{sup +0.08}(syst) is consistent with CPT conservation.},
doi = {10.1103/PHYSREVD.75.092003},
journal = {Physical Review. D, Particles Fields},
number = 9,
volume = 75,
place = {United States},
year = {Tue May 01 00:00:00 EDT 2007},
month = {Tue May 01 00:00:00 EDT 2007}
}