Search for a diffuse flux of astrophysical muon neutrinos with the IceCube 59-string configuration

被引：76

作者：

Aartsen, M. G. ^{[2
]}

Abbasi, R. ^{[31
]}

Ackermann, M. ^{[47
]}

Adams, J. ^{[16
]}

Aguilar, J. A. ^{[25
]}

Ahlers, M. ^{[31
]}

Altmann, D. ^{[24
]}

Arguelles, C. ^{[31
]}

Arlen, T. C. ^{[44
]}

Auffenberg, J. ^{[31
]}

Bai, X. ^{[35
,48
]}

Baker, M. ^{[31
]}

Barwick, S. W. ^{[27
]}

Baum, V. ^{[32
]}

Bay, R. ^{[8
]}

Beatty, J. J. ^{[18
,19
,20
]}

Tjus, J. Becker ^{[11
]}

Becker, K. -H. ^{[46
]}

BenZvi, S. ^{[31
]}

Berghaus, P. ^{[47
]}

Berley, D. ^{[17
]}

Bernardini, E. ^{[47
]}

Bernhard, A. ^{[34
]}

Besson, D. Z. ^{[29
]}

Binder, G. ^{[8
,9
]}

Bindig, D. ^{[46
]}

Bissok, M. ^{[1
]}

Blaufuss, E. ^{[17
]}

Blumenthal, J. ^{[1
]}

Boersma, D. J. ^{[45
]}

Bohm, C. ^{[38
]}

Bose, D. ^{[40
]}

Boeser, S. ^{[12
]}

Botner, O. ^{[45
]}

Brayeur, L. ^{[14
]}

Bretz, H. -P. ^{[47
]}

Brown, A. M. ^{[16
]}

Bruijn, R. ^{[28
]}

Casey, J. ^{[5
,6
]}

Casier, M. ^{[14
]}

Chirkin, D. ^{[31
]}

Christov, A. ^{[25
]}

Christy, B. ^{[17
]}

Clark, K. ^{[41
]}

Classen, L. ^{[24
]}

Clevermann, F. ^{[22
]}

Coenders, S. ^{[1
]}

Cohen, S. ^{[28
]}

Cowen, D. F. ^{[43
,44
]}

Silva, A. H. Cruz ^{[47
]}

机构：

[1] Univ Aachen, RWTH, Inst Phys 3, D-52056 Aachen, Germany

[2] Univ Adelaide, Sch Chem & Phys, Adelaide, SA 5005, Australia

[3] Univ Alaska Anchorage, Dept Phys & Astron, Anchorage, AK 99508 USA

[4] Clark Atlanta Univ, CTSPS, Atlanta, GA 30314 USA

[5] Georgia Inst Technol, Sch Phys, Atlanta, GA 30332 USA

[6] Georgia Inst Technol, Ctr Relativist Astrophys, Atlanta, GA 30332 USA

[7] Southern Univ, Dept Phys, Baton Rouge, LA 70813 USA

[8] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[9] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA

[10] Humboldt Univ, Inst Phys, D-12489 Berlin, Germany

[11] Ruhr Univ Bochum, Fak Phys & Astron, D-44780 Bochum, Germany

[12] Univ Bonn, Inst Phys, D-53115 Bonn, Germany

[13] Univ Libre Bruxelles, Sci Fac CP230, B-1050 Brussels, Belgium

[14] Vrije Univ Brussel, Dienst ELEM, B-1050 Brussels, Belgium

[15] Chiba Univ, Dept Phys, Chiba 2638522, Japan

[16] Univ Canterbury, Dept Phys & Astron, Christchurch 8140, New Zealand

[17] Univ Maryland, Dept Phys, College Pk, MD 20742 USA

[18] Ohio State Univ, Dept Phys, Columbus, OH 43210 USA

[19] Ohio State Univ, Ctr Cosmol & Astroparticle Phys, Columbus, OH 43210 USA

[20] Ohio State Univ, Dept Astron, Columbus, OH 43210 USA

[21] Univ Copenhagen, Niels Bohr Inst, DK-2100 Copenhagen, Denmark

[22] TU Dortmund Univ, Dept Phys, D-44221 Dortmund, Germany

[23] Univ Alberta, Dept Phys, Edmonton, AB T6G 2E1, Canada

[24] Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, D-91058 Erlangen, Germany

[25] Univ Geneva, Dept Phys Nucl & Corpusculaire, CH-1211 Geneva, Switzerland

[26] Univ Ghent, Dept Phys & Astron, B-9000 Ghent, Belgium

[27] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA

[28] Ecole Polytech Fed Lausanne, High Energy Phys Lab, CH-1015 Lausanne, Switzerland

[29] Univ Kansas, Dept Phys & Astron, Lawrence, KS 66045 USA

[30] Univ Wisconsin, Dept Astron, Madison, WI 53706 USA

[31] Univ Wisconsin, Dept Phys, Wisconsin IceCube Particle Astrophys Ctr, Madison, WI 53706 USA

[32] Johannes Gutenberg Univ Mainz, Inst Phys, D-55099 Mainz, Germany

[33] Univ Mons, B-7000 Mons, Belgium

[34] Tech Univ Munich, D-85748 Garching, Germany

[35] Univ Delaware, Bartol Res Inst, Dept Phys & Astron, Newark, DE 19716 USA

[36] Univ Oxford, Dept Phys, Oxford OX1 3NP, England

[37] Univ Wisconsin, Dept Phys, River Falls, WI 54022 USA

[38] Stockholm Univ, Dept Phys, Oskar Klein Ctr, SE-10691 Stockholm, Sweden

[39] SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA

[40] Sungkyunkwan Univ, Dept Phys, Suwon 440746, South Korea

[41] Univ Toronto, Dept Phys, Toronto, ON M5S 1A7, Canada

[42] Univ Alabama, Dept Phys & Astron, Tuscaloosa, AL 35487 USA

[43] Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA

[44] Penn State Univ, Dept Phys, University Pk, PA 16802 USA

[45] Uppsala Univ, Dept Phys & Astron, S-75120 Uppsala, Sweden

[46] Univ Wuppertal, Dept Phys, D-42119 Wuppertal, Germany

[47] DESY, D-15735 Zeuthen, Germany

[48] South Dakota Sch Mines & Technol, Dept Phys, Rapid City, SD 57701 USA

[49] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

来源：

PHYSICAL REVIEW D | 2014年 / 89卷 / 06期

基金：

美国国家科学基金会; 新加坡国家研究基金会; 加拿大自然科学与工程研究理事会; 瑞士国家科学基金会; 澳大利亚研究理事会; 瑞典研究理事会;

关键词：

HIGH-ENERGY NEUTRINOS; PERFORMANCE; SELECTION; RATIO; ICE;

D O I：

10.1103/PhysRevD.89.062007

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A search for high-energy neutrinos was performed using data collected by the IceCube Neutrino Observatory from May 2009 to May 2010, when the array was running in its 59-string configuration. The data sample was optimized to contain muon neutrino induced events with a background contamination of atmospheric muons of less than 1%. These data, which are dominated by atmospheric neutrinos, are analyzed with a global likelihood fit to search for possible contributions of prompt atmospheric and astrophysical neutrinos, neither of which have yet been identified. Such signals are expected to follow a harder energy spectrum than conventional atmospheric neutrinos. In addition, the zenith angle distribution differs for astrophysical and atmospheric signals. A global fit of the reconstructed energies and directions of observed events is performed, including possible neutrino flux contributions for an astrophysical signal and atmospheric backgrounds as well as systematic uncertainties of the experiment and theoretical predictions. The best fit yields an astrophysical signal flux for nu(mu) + (nu) over bar (mu) of E-2. Phi(E) = 0.25 x 10(-8) GeV cm(-2) s(-1) sr(-1), and a zero prompt component. Although the sensitivity of this analysis for astrophysical neutrinos surpasses the Waxman and Bahcall upper bound, the experimental limit at 90% confidence level is a factor of 1.5 above at a flux of E-2 . Phi(E) = 1.44 x 10(-8) GeV cm(-2) s(-1) sr(-1).

引用

页数：19

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Bechet, S. ;

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Berdermann, J. ;

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Beatty, J. J. ;

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Becker, J. K. ;

Becker, K-H ;

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Berdermann, J. ;

Berghaus, P. ;

Berley, D. ;

Bernardini, E. ;

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Bissok, M. ;

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