First search for atmospheric and extraterrestrial neutrino-induced cascades with the IceCube detector

被引：33
作者：
Abbasi, R. [30 ]
Abdou, Y. [24 ]
Abu-Zayyad, T. [36 ]
Adams, J. [17 ]
Aguilar, J. A. [30 ]
Ahlers, M. [35 ]
Andeen, K. [30 ]
Auffenberg, J. [42 ]
Bai, X. [33 ,34 ]
Baker, M. [30 ]
Barwick, S. W. [26 ]
Bay, R. [9 ]
Alba, J. L. Bazo [43 ]
Beattie, K. [1 ]
Beatty, J. J. [19 ,20 ,21 ]
Bechet, S. [14 ]
Becker, J. K. [11 ]
Becker, K-H [42 ]
Benabderrahmane, M. L. [43 ]
BenZvi, S. [30 ]
Berdermann, J. [43 ]
Berghaus, P. [30 ]
Berley, D. [18 ]
Bernardini, E. [43 ]
Bertrand, D. [14 ]
Besson, D. Z. [28 ]
Bindig, D. [42 ]
Bissok, M. [2 ]
Blaufuss, E. [18 ]
Blumenthal, J. [2 ]
Boersma, D. J. [2 ]
Bohm, C. [37 ,38 ]
Bose, D. [15 ]
Boeser, S. [12 ]
Botner, O. [41 ]
Braun, J. [30 ]
Brown, A. M. [17 ]
Buitink, S. [1 ]
Carson, M. [24 ]
Chirkin, D. [30 ]
Christy, B. [18 ]
Clem, J. [33 ,34 ]
Clevermann, F. [22 ]
Cohen, S. [27 ]
Colnard, C. [25 ]
Cowen, D. F. [39 ,40 ]
D'Agostino, M. V. [9 ]
Danninger, M. [37 ,38 ]
Daughhetee, J. [6 ,7 ]
Davis, J. C. [19 ,20 ]
机构：
[1] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA
[2] Rhein Westfal TH Aachen, Inst Phys 3, D-52056 Aachen, Germany
[3] Univ Alabama, Dept Phys & Astron, Tuscaloosa, AL 35487 USA
[4] Univ Alaska Anchorage, Dept Phys & Astron, Anchorage, AK 99508 USA
[5] Clark Atlanta Univ, CTSPS, Atlanta, GA 30314 USA
[6] Georgia Inst Technol, Sch Phys, Atlanta, GA 30332 USA
[7] Georgia Inst Technol, Ctr Relativist Astrophys, Atlanta, GA 30332 USA
[8] Southern Univ, Dept Phys, Baton Rouge, LA 70813 USA
[9] Univ Calif Berkeley, Dept Phys, 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 W Indies, Dept Phys, BB-11000 Bridgetown, Barbados
[14] Univ Libre Bruxelles, Fac Sci, B-1050 Brussels, Belgium
[15] Vrije Univ Brussel, Dienst ELEM, B-1050 Brussels, Belgium
[16] Chiba Univ, Dept Phys, Chiba 2638522, Japan
[17] Univ Canterbury, Dept Phys & Astron, Christchurch 1, New Zealand
[18] Univ Maryland, Dept Phys, College Pk, MD 20742 USA
[19] Ohio State Univ, Dept Phys, Columbus, OH 43210 USA
[20] Ohio State Univ, Ctr Cosmol & Astroparticle Phys, Columbus, OH 43210 USA
[21] Ohio State Univ, Dept Astron, Columbus, OH 43210 USA
[22] TU Dortmund Univ, Dept Phys, D-44221 Dortmund, Germany
[23] Univ Alberta, Dept Phys, Edmonton, AB T6G 2G7, Canada
[24] Univ Ghent, Dept Subatom & Radiat Phys, B-9000 Ghent, Belgium
[25] Max Planck Inst Kernphys, D-69177 Heidelberg, Germany
[26] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA
[27] Ecole Polytech Fed Lausanne, High Energy Phys Lab, CH-1015 Lausanne, Switzerland
[28] Univ Kansas, Dept Phys & Astron, Lawrence, KS 66045 USA
[29] Univ Wisconsin, Dept Astron, Madison, WI 53706 USA
[30] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA
[31] Johannes Gutenberg Univ Mainz, Inst Phys, D-55099 Mainz, Germany
[32] Univ Mons, B-7000 Mons, Belgium
[33] Univ Delaware, Bartol Res Inst, Newark, DE 19716 USA
[34] Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USA
[35] Univ Oxford, Dept Phys, Oxford OX1 3NP, England
[36] Univ Wisconsin, Dept Phys, River Falls, WI 54022 USA
[37] Stockholm Univ, Oskar Klein Ctr, SE-10691 Stockholm, Sweden
[38] Stockholm Univ, Dept Phys, SE-10691 Stockholm, Sweden
[39] Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA
[40] Penn State Univ, Dept Phys, University Pk, PA 16802 USA
[41] Uppsala Univ, Dept Phys & Astron, S-75120 Uppsala, Sweden
[42] Univ Wuppertal, Dept Phys, D-42119 Wuppertal, Germany
[43] DESY, D-15735 Zeuthen, Germany
[44] Univ Bari, Dipartmento Fis, Sez INFN, I-70126 Bari, Italy
[45] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA
来源：
PHYSICAL REVIEW D | 2011年 / 84卷 / 07期
基金：
美国国家科学基金会; 瑞典研究理事会; 瑞士国家科学基金会;
关键词：
HIGH-ENERGY NEUTRINOS; SCATTERING; SELECTION; SPECTRUM; ICE;
D O I：
10.1103/PhysRevD.84.072001
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We report on the first search for atmospheric and for diffuse astrophysical neutrino-induced showers (cascades) in the IceCube detector using 257 days of data collected in the year 2007-2008 with 22 strings active. A total of 14 events with energies above 16 TeV remained after event selections in the diffuse analysis, with an expected total background contribution of 8.3 +/- 3.6. At 90% confidence we set an upper limit of E-2 Phi(90%CL) < 3.6 x 10(-7) GeV.cm(-2).s(-1).sr(-1) on the diffuse flux of neutrinos of all flavors in the energy range between 24 TeV and 6.6 PeV assuming that Phi proportional to E-2 and the flavor composition of the nu(e):nu(mu):nu(tau) flux is 1:1:1 at the Earth. The atmospheric neutrino analysis was optimized for lower energies. A total of 12 events were observed with energies above 5 TeV. The observed number of events is consistent with the expected background, within the uncertainties.
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页数：15
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