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First observation of the Greisen-Zatsepin-Kuzmin suppression

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Publication Type Journal Article
School or College College of Science
Department Physics
Creator Sokolsky, Pierre
Other Author Abbasi, R. U.; Abu-Zayyad, T.; Allen, M.; Amman, J. F.; Archbold, G.; Belov, K.; Belz, J. W.; Ben Zvi S. Y.; Bergman, D. R.; Blake, S. A.; Brusova, O. A.; Burt, G. W.; Cannon, C.; Cao, Z.; Connolly, B. C.; Deng, W.; Fedorova, Y.; Finley, C. B.; Gray, R. C.; Hanlon, W. F.; Hoffmann, C. M.; Holzscheiter, M. H.; Hughes, G.; Huntemeyer, P.; Jones, B. F.; Jui, C. C. H.; Kim, K.; Kirn, M. A.; Loh, E. C.; Maestas, M. M.; Manago, N.; Marek, L. J.; Martens, K.; Matthews, J. A. J.; Matthews, J. N.; Moore, S. A.; O'Neill, A.; Painter, C. A.; Perera, L.; Reil, K.; Riehle, R.; Roberts, M.; Rodriguez, D.; Sasaki, N.; Schnetzer, S. R.; Scott, L. M.; Sinnis, G.; Smith, J. D.; Song, C.; Springer, R. W.; Stokes, B.; Thomas, S. B.; Thomas, J. R.; Thomson, G. B.; Tupa, D.; Westerhoff, S.; Wiencke, L. R.; Zhang, Z.; Zech, A.
Title First observation of the Greisen-Zatsepin-Kuzmin suppression
Date 2008-03
Description The High Resolution Fly's Eye (HiRes) experiment has observed the Greisen-Zatsepin-Kuzmin suppression (called the GZK cutoff) with a statistical significance of five standard deviations. HiRes' measurement of the flux of ultrahigh energy cosmic rays shows a sharp suppression at an energy of 6 x 10^19 eV, consistent with the expected cutoff energy. We observe the ankle of the cosmic-ray energy spectrum as well, at an energy of 4 x 10^18 eV. We describe the experiment, data collection, and analysis and estimate the systematic uncertainties. The results are presented and the calculation of the statistical significance of our observation is described.
Type Text
Publisher American Physical Society
Journal Title Physical Review Letters
Volume 100
Issue 10
DOI 10.1103/PhysRevLett.100.101101
citatation_issn 0031-9007
Subject Extensive air showers; Suppression; Energy spectrum; Fluorescence; GZK cutoff
Subject LCSH Cosmic rays; Cosmic ray showers
Language eng
Bibliographic Citation Abbasi, R. U., Abu-Zayyad, T., Allen, M., Amman, J. F., Archbold, G., Belov, K., Belz, J. W., Ben Zvi, S. Y., Bergman, D. R., Blake, S. A., Brusova, O. A., Burt, G. W., Cannon, C., Cao, Z., Connolly, B. C., Deng, W., Fedorova, Y., Finley, C. B., Gray, R. C., Hanlon, W. F., Hoffmann, C. M., Holzscheiter, M. H., Hughes, G., Huntemeyer, P., Jones, B. F., Jui, C. C. H., Kim, K., Kirn, M. A., Loh, E. C., Maestas, M. M., Manago, N., Marek, L. J., Martens, K., Matthews, J. A. J., Matthews, J. N., Moore, S. A., O'Neill, A., Painter, C. A., Perera, L., Reil, K., Riehle, R., Roberts, M., Rodriguez, D., Sasaki, N., Schnetzer, S. R., Scott, L. M., Sinnis, G., Smith, J. D., Sokolsky, P., Song, C., Springer, R. W., Stokes, B., Thomas, S. B., Thomas, J. R., Thomson, G. B., Tupa, D., Westerhoff, S., Wiencke, L. R., Zhang, Z., & Zech, A. (2008). First observation of the greisen-zatsepin-kuzmin suppression. Physical Review Letters, 100(10), 101101.
Rights Management (c) American Physical Society http://dx.doi.org/10.1103/PhysRevLett.100.101101
Format Medium application/pdf
Format Extent 196,211 bytes
Identifier ir-main,10473
ARK ark:/87278/s6st87fp
Setname ir_uspace
ID 706972
Reference URL https://collections.lib.utah.edu/ark:/87278/s6st87fp
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