Author: "Euler, S" / Topic: nuclear - Searchworks@Jio Institute Digital Library Search Results

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45 results on '"Euler, S"'

1. Erratum to: Search for annihilating dark matter in the Sun with 3 years of IceCube data: IceCube Collaboration (The European Physical Journal C, (2017), 77, 3, (146), 10.1140/epjc/s10052-017-4689-9)

Author: Aartsen, MG, Ackermann, M, Adams, J, Aguilar, JA, Ahlers, M, Ahrens, M, Altmann, D, Andeen, K, Anderson, T, Ansseau, I, Anton, G, Archinger, M, Argüelles, C, Auffenberg, J, Axani, S, Bai, X, Barwick, SW, Baum, V, Bay, R, Beatty, JJ, Becker Tjus, J, Becker, KH, BenZvi, S, Berley, D, Bernardini, E, Bernhard, A, Besson, DZ, Binder, G, Bindig, D, Bissok, M, Blaufuss, E, Blot, S, Bohm, C, Börner, M, Bos, F, Bose, D, Böser, S, Botner, O, Braun, J, Brayeur, L, Bretz, HP, Bron, S, Burgman, A, Carver, T, Casier, M, Cheung, E, Chirkin, D, Christov, A, Clark, K, Classen, L, Coenders, S, Collin, GH, Conrad, JM, Cowen, DF, Cross, R, Day, M, de André, JPAM, De Clercq, C, del Pino Rosendo, E, Dembinski, H, De Ridder, S, Desiati, P, de Vries, KD, de Wasseige, G, de With, M, DeYoung, T, Díaz-Vélez, JC, di Lorenzo, V, Dujmovic, H, Dumm, JP, Dunkman, M, Eberhardt, B, Ehrhardt, T, Eichmann, B, Eller, P, Euler, S, Evenson, PA, Fahey, S, Fazely, AR, Feintzeig, J, Felde, J, Filimonov, K, Finley, C, Flis, S, Fösig, CC, Franckowiak, A, Friedman, E, Fuchs, T, Gaisser, TK, Gallagher, J, Gerhardt, L, Ghorbani, K, Giang, W, Gladstone, L, Glauch, T, Glüsenkamp, T, Goldschmidt, A, Gonzalez, JG, Grant, D, and Griffith, Z
Subjects: Nuclear & Particles Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics
Abstract: In the analysis published in 1, constraints on the number of signal events can be interpreted as constraints on the volumetric neutrino to muon conversion rate.
Published: 2019

2. Erratum to: Search for non-relativistic magnetic monopoles with IceCube

Author: Aartsen, MG, Abbasi, R, Ackermann, M, Adams, J, Aguilar, JA, Ahlers, M, Altmann, D, Arguelles, C, Arlen, TC, Auffenberg, J, Bai, X, Baker, M, Barwick, SW, Baum, V, Bay, R, Beatty, JJ, Tjus, J Becker, Becker, K-H, Benabderrahmane, ML, BenZvi, S, Berghaus, P, Berley, D, Bernardini, E, Bernhard, A, Besson, DZ, Binder, G, Bindig, D, Bissok, M, Blaufuss, E, Blumenthal, J, Boersma, DJ, Bohm, C, Bose, D, Böser, S, Botner, O, Brayeur, L, Bretz, H-P, Brown, AM, Bruijn, R, Casey, J, Casier, M, Chirkin, D, Christov, A, Christy, B, Clark, K, Classen, L, Clevermann, F, Coenders, S, Cohen, S, Cowen, DF, Silva, AH Cruz, Danninger, M, Daughhetee, J, Davis, JC, Day, M, de André, JPAM, De Clercq, C, De Ridder, S, Desiati, P, de Vries, KD, de With, M, DeYoung, T, Díaz-Vélez, JC, Dunkman, M, Eagan, R, Eberhardt, B, Eichmann, B, Eisch, J, Euler, S, Evenson, PA, Fadiran, O, Fazely, AR, Fedynitch, A, Feintzeig, J, Feusels, T, Filimonov, K, Finley, C, Fischer-Wasels, T, Flis, S, Franckowiak, A, Frantzen, K, Fuchs, T, Gaisser, TK, Gallagher, J, Gerhardt, L, Gladstone, L, Glüsenkamp, T, Goldschmidt, A, Golup, G, Gonzalez, JG, Goodman, JA, Góra, D, Grandmont, DT, Grant, D, Gretskov, P, Groh, JC, Groß, A, Ha, C, Haack, C, and Ismail, A Haj
Subjects: Nuclear and Plasma Physics, Particle and High Energy Physics, Physical Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics, Astronomical sciences, Atomic, molecular and optical physics, Particle and high energy physics
Abstract: In the analyses, published in Ref. [1], the exclusion limits are calculated in dependence of the mean free path of the magnetic monopole - nucleon catalysis interaction.
Published: 2019

3. Measurement of the νμ energy spectrum with IceCube-79

Author: Aartsen, MG, Ackermann, M, Adams, J, Aguilar, JA, Ahlers, M, Ahrens, M, Al Samarai, I, Altmann, D, Andeen, K, Anderson, T, Ansseau, I, Anton, G, Archinger, M, Argüelles, C, Auffenberg, J, Axani, S, Bagherpour, H, Bai, X, Barwick, SW, Baum, V, Bay, R, Beatty, JJ, Becker Tjus, J, Becker, K-H, BenZvi, S, Berley, D, Bernardini, E, Besson, DZ, Binder, G, Bindig, D, Blaufuss, E, Blot, S, Bohm, C, Börner, M, Bos, F, Bose, D, Böser, S, Botner, O, Bradascio, F, Braun, J, Brayeur, L, Bretz, H-P, Bron, S, Burgman, A, Carver, T, Casier, M, Cheung, E, Chirkin, D, Christov, A, Clark, K, Classen, L, Coenders, S, Collin, GH, Conrad, JM, Cowen, DF, Cross, R, Day, M, de André, JPAM, De Clercq, C, del Pino Rosendo, E, Dembinski, H, De Ridder, S, Desiati, P, de Vries, KD, de Wasseige, G, de With, M, DeYoung, T, Díaz-Vélez, JC, di Lorenzo, V, Dujmovic, H, Dumm, JP, Dunkman, M, Eberhardt, B, Ehrhardt, T, Eichmann, B, Eller, P, Euler, S, Evenson, PA, Fahey, S, Fazely, AR, Feintzeig, J, Felde, J, Filimonov, K, Finley, C, Flis, S, Fösig, C-C, Franckowiak, A, Friedman, E, Fuchs, T, Gaisser, TK, Gallagher, J, Gerhardt, L, Ghorbani, K, Giang, W, Gladstone, L, Glauch, T, Glüsenkamp, T, Goldschmidt, A, Gonzalez, JG, and Grant, D
Subjects: Nuclear and Plasma Physics, Particle and High Energy Physics, Physical Sciences, astro-ph.HE, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics, Astronomical sciences, Atomic, molecular and optical physics, Particle and high energy physics
Abstract: IceCube is a neutrino observatory deployed in the glacial ice at the geographic South Pole. The ν μ energy unfolding described in this paper is based on data taken with IceCube in its 79-string configuration. A sample of muon neutrino charged-current interactions with a purity of 99.5% was selected by means of a multivariate classification process based on machine learning. The subsequent unfolding was performed using the software Truee. The resulting spectrum covers an E ν -range of more than four orders of magnitude from 125 GeV to 3.2 PeV. Compared to the Honda atmospheric neutrino flux model, the energy spectrum shows an excess of more than 1.9 σ in four adjacent bins for neutrino energies E ν ≥ 177.8 TeV . The obtained spectrum is fully compatible with previous measurements of the atmospheric neutrino flux and recent IceCube measurements of a flux of high-energy astrophysical neutrinos.
Published: 2017

4. Extending the Search for Muon Neutrinos Coincident with Gamma-Ray Bursts in IceCube Data

Author: Collaboration, I, Aartsen, MG, Ackermann, M, Adams, J, Aguilar, JA, Ahlers, M, Ahrens, M, Samarai, IA, Altmann, D, Andeen, K, Anderson, T, Ansseau, I, Anton, G, Archinger, M, Argüelles, C, Auffenberg, J, Axani, S, Bai, X, Barwick, SW, Baum, V, Bay, R, Beatty, JJ, Tjus, JB, Becker, KH, Benzvi, S, Berley, D, Bernardini, E, Besson, DZ, Binder, G, Bindig, D, Blaufuss, E, Blot, S, Bohm, C, Börner, M, Bos, F, Bose, D, Böser, S, Botner, O, Braun, J, Brayeur, L, Bretz, HP, Bron, S, Burgman, A, Carver, T, Casier, M, Cheung, E, Chirkin, D, Christov, A, Clark, K, Classen, L, Coenders, S, Collin, GH, Conrad, JM, Cowen, DF, Cross, R, Day, M, De André, JPAM, De Clercq, C, Del Pino Rosendo, E, Dembinski, H, Ridder, SD, Desiati, P, De Vries, KD, De Wasseige, G, De With, M, Deyoung, T, Díaz-Vélez, JC, Lorenzo, VD, Dujmovic, H, Dumm, JP, Dunkman, M, Eberhardt, B, Ehrhardt, T, Eichmann, B, Eller, P, Euler, S, Evenson, PA, Fahey, S, Fazely, AR, Feintzeig, J, Felde, J, Filimonov, K, Finley, C, Flis, S, Fösig, CC, Franckowiak, A, Friedman, E, Fuchs, T, Gaisser, TK, Gallagher, J, Gerhardt, L, Ghorbani, K, Giang, W, Gladstone, L, Glauch, T, Glüsenkamp, T, Goldschmidt, A, Gonzalez, JG, Grant, D, and Griffith, Z
Subjects: acceleration of particles, astroparticle physics, gamma-ray burst: general, neutrinos, astro-ph.HE, Astronomy & Astrophysics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Physical Chemistry, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Physical Chemistry (incl. Structural)
Abstract: We present an all-sky search for muon neutrinos produced during the prompt γ-ray emission of 1172 gamma-ray bursts (GRBs) with the IceCube Neutrino Observatory. The detection of these neutrinos would constitute evidence for ultra-high-energy cosmic-ray (UHECR) production in GRBs, as interactions between accelerated protons and the prompt γ-ray field would yield charged pions, which decay to neutrinos. A previously reported search for muon neutrino tracks from northern hemisphere GRBs has been extended to include three additional years of IceCube data. A search for such tracks from southern hemisphere GRBs in five years of IceCube data has been introduced to enhance our sensitivity to the highest energy neutrinos. No significant correlation between neutrino events and observed GRBs is seen in the new data. Combining this result with previous muon neutrino track searches and a search for cascade signature events from all neutrino flavors, we obtain new constraints for single-zone fireball models of GRB neutrino and UHECR production.
Published: 2017

5. Extending the Search for Muon Neutrinos Coincident with Gamma-Ray Bursts in IceCube Data

Author: Aartsen, MG, Ackermann, M, Adams, J, Aguilar, JA, Ahlers, M, Ahrens, M, Al Samarai, I, Altmann, D, Andeen, K, Anderson, T, Ansseau, I, Anton, G, Archinger, M, Argüelles, C, Auffenberg, J, Axani, S, Bai, X, Barwick, SW, Baum, V, Bay, R, Beatty, JJ, Tjus, J Becker, Becker, K-H, BenZvi, S, Berley, D, Bernardini, E, Besson, DZ, Binder, G, Bindig, D, Blaufuss, E, Blot, S, Bohm, C, Börner, M, Bos, F, Bose, D, Böser, S, Botner, O, Braun, J, Brayeur, L, Bretz, H-P, Bron, S, Burgman, A, Carver, T, Casier, M, Cheung, E, Chirkin, D, Christov, A, Clark, K, Classen, L, Coenders, S, Collin, GH, Conrad, JM, Cowen, DF, Cross, R, Day, M, de André, JPAM, De Clercq, C, del Pino Rosendo, E, Dembinski, H, De Ridder, S, Desiati, P, de Vries, KD, de Wasseige, G, de With, M, DeYoung, T, Díaz-Vélez, JC, di Lorenzo, V, Dujmovic, H, Dumm, JP, Dunkman, M, Eberhardt, B, Ehrhardt, T, Eichmann, B, Eller, P, Euler, S, Evenson, PA, Fahey, S, Fazely, AR, Feintzeig, J, Felde, J, Filimonov, K, Finley, C, Flis, S, Fösig, C-C, Franckowiak, A, Friedman, E, Fuchs, T, Gaisser, TK, Gallagher, J, Gerhardt, L, Ghorbani, K, Giang, W, Gladstone, L, Glauch, T, Glüsenkamp, T, Goldschmidt, A, Gonzalez, JG, Grant, D, Griffith, Z, and Haack, C
Subjects: Nuclear and Plasma Physics, Particle and High Energy Physics, Physical Sciences, acceleration of particles, astroparticle physics, gamma-ray burst: general, neutrinos, astro-ph.HE, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Physical Chemistry (incl. Structural), Astronomy & Astrophysics, Astronomical sciences, Particle and high energy physics, Space sciences
Abstract: We present an all-sky search for muon neutrinos produced during the prompt γ-ray emission of 1172 gamma-ray bursts (GRBs) with the IceCube Neutrino Observatory. The detection of these neutrinos would constitute evidence for ultra-high-energy cosmic-ray (UHECR) production in GRBs, as interactions between accelerated protons and the prompt γ-ray field would yield charged pions, which decay to neutrinos. A previously reported search for muon neutrino tracks from northern hemisphere GRBs has been extended to include three additional years of IceCube data. A search for such tracks from southern hemisphere GRBs in five years of IceCube data has been introduced to enhance our sensitivity to the highest energy neutrinos. No significant correlation between neutrino events and observed GRBs is seen in the new data. Combining this result with previous muon neutrino track searches and a search for cascade signature events from all neutrino flavors, we obtain new constraints for single-zone fireball models of GRB neutrino and UHECR production.
Published: 2017

6. The IceCube realtime alert system

Author: Aartsen, MG, Ackermann, M, Adams, J, Aguilar, JA, Ahlers, M, Ahrens, M, Altmann, D, Andeen, K, Anderson, T, Ansseau, I, Anton, G, Archinger, M, Argüelles, C, Auffenberg, J, Axani, S, Bai, X, Barwick, SW, Baum, V, Bay, R, Beatty, JJ, Tjus, J Becker, Becker, K-H, BenZvi, S, Berley, D, Bernardini, E, Bernhard, A, Besson, DZ, Binder, G, Bindig, D, Bissok, M, Blaufuss, E, Blot, S, Bohm, C, Börner, M, Bos, F, Bose, D, Böser, S, Botner, O, Braun, J, Brayeur, L, Bretz, H-P, Bron, S, Burgman, A, Carver, T, Casier, M, Cheung, E, Chirkin, D, Christov, A, Clark, K, Classen, L, Coenders, S, Collin, GH, Conrad, JM, Cowen, DF, Cross, R, Day, M, de André, JPAM, De Clercq, C, del Pino Rosendo, E, Dembinski, H, De Ridder, S, Desiati, P, de Vries, KD, de Wasseige, G, de With, M, DeYoung, T, Díaz-Vélez, JC, di Lorenzo, V, Dujmovic, H, Dumm, JP, Dunkman, M, Eberhardt, B, Ehrhardt, T, Eichmann, B, Eller, P, Euler, S, Evenson, PA, Fahey, S, Fazely, AR, Feintzeig, J, Felde, J, Filimonov, K, Finley, C, Flis, S, Fösig, C-C, Franckowiak, A, Friedman, E, Fuchs, T, Gaisser, TK, Gallagher, J, Gerhardt, L, Ghorbani, K, Giang, W, Gladstone, L, Glauch, T, Glüsenkamp, T, Goldschmidt, A, Gonzalez, JG, Grant, D, and Griffith, Z
Subjects: Nuclear and Plasma Physics, Particle and High Energy Physics, Physical Sciences, Neutrino astronomy, Neutrino detectors, Transient sources, Multi-messenger astronomy, astro-ph.HE, astro-ph.IM, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Nuclear & Particles Physics, Astronomical sciences, Particle and high energy physics
Abstract: Although high-energy astrophysical neutrinos were discovered in 2013, their origin is still unknown. Aiming for the identification of an electromagnetic counterpart of a rapidly fading source, we have implemented a realtime analysis framework for the IceCube neutrino observatory. Several analyses selecting neutrinos of astrophysical origin are now operating in realtime at the detector site in Antarctica and are producing alerts for the community to enable rapid follow-up observations. The goal of these observations is to locate the astrophysical objects responsible for these neutrino signals. This paper highlights the infrastructure in place both at the South Pole site and at IceCube facilities in the north that have enabled this fast follow-up program to be implemented. Additionally, this paper presents the first realtime analyses to be activated within this framework, highlights their sensitivities to astrophysical neutrinos and background event rates, and presents an outlook for future discoveries.
Published: 2017

7. Search for sterile neutrino mixing using three years of IceCube DeepCore data

Author: Aartsen, MG, Ackermann, M, Adams, J, Aguilar, JA, Ahlers, M, Ahrens, M, Samarai, I Al, Altmann, D, Andeen, K, Anderson, T, Ansseau, I, Anton, G, Archinger, M, Argüelles, C, Auffenberg, J, Axani, S, Bai, X, Barwick, SW, Baum, V, Bay, R, Beatty, JJ, Tjus, J Becker, Becker, K-H, BenZvi, S, Berley, D, Bernardini, E, Besson, DZ, Binder, G, Bindig, D, Blaufuss, E, Blot, S, Bohm, C, Börner, M, Bos, F, Bose, D, Böser, S, Botner, O, Braun, J, Brayeur, L, Bretz, H-P, Bron, S, Burgman, A, Carver, T, Casier, M, Cheung, E, Chirkin, D, Christov, A, Clark, K, Classen, L, Coenders, S, Collin, GH, Conrad, JM, Cowen, DF, Cross, R, Day, M, de André, JPAM, De Clercq, C, del Pino Rosendo, E, Dembinski, H, De Ridder, S, Desiati, P, de Vries, KD, de Wasseige, G, de With, M, DeYoung, T, Díaz-Vélez, JC, di Lorenzo, V, Dujmovic, H, Dumm, JP, Dunkman, M, Eberhardt, B, Ehrhardt, T, Eichmann, B, Eller, P, Euler, S, Evenson, PA, Fahey, S, Fazely, AR, Feintzeig, J, Felde, J, Filimonov, K, Finley, C, Flis, S, Fösig, C-C, Franckowiak, A, Friedman, E, Fuchs, T, Gaisser, TK, Gallagher, J, Gerhardt, L, Ghorbani, K, Giang, W, Gladstone, L, Glauch, T, Glüsenkamp, T, Goldschmidt, A, Gonzalez, JG, Grant, D, Griffith, Z, and Haack, C
Subjects: hep-ex, hep-ph, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics
Abstract: We present a search for a light sterile neutrino using three years of atmospheric neutrino data from the DeepCore detector in the energy range of approximately 10-60 GeV. DeepCore is the low-energy subarray of the IceCube Neutrino Observatory. The standard three-neutrino paradigm can be probed by adding an additional light (Δm412∼1 eV2) sterile neutrino. Sterile neutrinos do not interact through the standard weak interaction and, therefore, cannot be directly detected. However, their mixing with the three active neutrino states leaves an imprint on the standard atmospheric neutrino oscillations for energies below 100 GeV. A search for such mixing via muon neutrino disappearance is presented here. The data are found to be consistent with the standard three-neutrino hypothesis. Therefore, we derive limits on the mixing matrix elements at the level of |Uμ4|2
Published: 2017

8. PINGU: a vision for neutrino and particle physics at the South Pole

Author: Aartsen, MG, Abraham, K, Ackermann, M, Adams, J, Aguilar, JA, Ahlers, M, Ahrens, M, Altmann, D, Andeen, K, Anderson, T, Ansseau, I, Anton, G, Archinger, M, Arguelles, C, Arlen, TC, Auffenberg, J, Axani, S, Bai, X, Bartos, I, Barwick, SW, Baum, V, Bay, R, Beatty, JJ, Tjus, J Becker, Becker, K-H, BenZvi, S, Berghaus, P, Berley, D, Bernardini, E, Bernhard, A, Besson, DZ, Binder, G, Bindig, D, Bissok, M, Blaufuss, E, Blot, S, Boersma, DJ, Bohm, C, Börner, M, Bos, F, Bose, D, Böser, S, Botner, O, Braun, J, Brayeur, L, Bretz, H-P, Burgman, A, Carver, T, Casier, M, Cheung, E, Chirkin, D, Christov, A, Clark, K, Classen, L, Coenders, S, Collin, GH, Conrad, JM, Cowen, DF, Cross, R, Day, M, de André, JPAM, De Clercq, C, del Rosendo, E Pino, Dembinski, H, De Ridder, S, Desiati, P, de Vries, KD, de Wasseige, G, de With, M, DeYoung, T, Díaz-Vélez, JC, di Lorenzo, V, Dujmovic, H, Dumm, JP, Dunkman, M, Eberhardt, B, Ehrhardt, T, Eichmann, B, Eller, P, Euler, S, Evans, JJ, Evenson, PA, Fahey, S, Fazely, AR, Feintzeig, J, Felde, J, Filimonov, K, Finley, C, Flis, S, Fösig, C-C, Franckowiak, A, Friedman, E, Fuchs, T, Gaisser, TK, Gallagher, J, Gerhardt, L, Ghorbani, K, Giang, W, Gladstone, L, and Glagla, M
Subjects: Nuclear and Plasma Physics, Particle and High Energy Physics, Physical Sciences, neutrino oscillations, atmospheric neutrinos, IceCube Neutrino Observatory, PINGU, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Nuclear & Particles Physics, Nuclear and plasma physics, Particle and high energy physics
Abstract: The Precision IceCube Next Generation Upgrade (PINGU) is a proposed lowenergy in-fill extension to the IceCube Neutrino Observatory. With detection technology modeled closely on the successful IceCube example, PINGU will provide a 6 Mton effective mass for neutrino detection with an energy threshold of a few GeV. With an unprecedented sample of over 60 000 atmospheric neutrinos per year in this energy range, PINGU will make highly competitive measurements of neutrino oscillation parameters in an energy range over an order of magnitude higher than long-baseline neutrino beam experiments. PINGU will measure the mixing parameters Θ23 and Δm232, including the octant of Θ23 for a wide range of values, and determine the neutrino mass ordering at 3σ median significance within five years of operation. PINGU's high precision measurement of the rate of nt appearance will provide essential tests of the unitarity of the 3 ×3 PMNS neutrino mixing matrix. PINGU will also improve the sensitivity of searches for low mass dark matter in the Sun, use neutrino tomography to directly probe the composition of the Earth's core, and improve IceCube's sensitivity to neutrinos from Galactic supernovae. Reoptimization of the PINGU design has permitted substantial reduction in both cost and logistical requirements while delivering performance nearly identical to configurations previously studied.
Published: 2017

9. Search for annihilating dark matter in the Sun with 3 years of IceCube data

Author: Aartsen, MG, Ackermann, M, Adams, J, Aguilar, JA, Ahlers, M, Ahrens, M, Altmann, D, Andeen, K, Anderson, T, Ansseau, I, Anton, G, Archinger, M, Argüelles, C, Auffenberg, J, Axani, S, Bai, X, Barwick, SW, Baum, V, Bay, R, Beatty, JJ, Becker Tjus, J, Becker, K-H, BenZvi, S, Berley, D, Bernardini, E, Bernhard, A, Besson, DZ, Binder, G, Bindig, D, Bissok, M, Blaufuss, E, Blot, S, Bohm, C, Börner, M, Bos, F, Bose, D, Böser, S, Botner, O, Braun, J, Brayeur, L, Bretz, H-P, Bron, S, Burgman, A, Carver, T, Casier, M, Cheung, E, Chirkin, D, Christov, A, Clark, K, Classen, L, Coenders, S, Collin, GH, Conrad, JM, Cowen, DF, Cross, R, Day, M, de André, JPAM, De Clercq, C, del Pino Rosendo, E, Dembinski, H, De Ridder, S, Desiati, P, de Vries, KD, de Wasseige, G, de With, M, DeYoung, T, Díaz-Vélez, JC, di Lorenzo, V, Dujmovic, H, Dumm, JP, Dunkman, M, Eberhardt, B, Ehrhardt, T, Eichmann, B, Eller, P, Euler, S, Evenson, PA, Fahey, S, Fazely, AR, Feintzeig, J, Felde, J, Filimonov, K, Finley, C, Flis, S, Fösig, C-C, Franckowiak, A, Friedman, E, Fuchs, T, Gaisser, TK, Gallagher, J, Gerhardt, L, Ghorbani, K, Giang, W, Gladstone, L, Glauch, T, Glüsenkamp, T, Goldschmidt, A, Gonzalez, JG, Grant, D, and Griffith, Z
Subjects: Nuclear and Plasma Physics, Particle and High Energy Physics, Physical Sciences, astro-ph.HE, hep-ex, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics, Astronomical sciences, Atomic, molecular and optical physics, Particle and high energy physics
Abstract: We present results from an analysis looking for dark matter annihilation in the Sun with the IceCube neutrino telescope. Gravitationally trapped dark matter in the Sun’s core can annihilate into Standard Model particles making the Sun a source of GeV neutrinos. IceCube is able to detect neutrinos with energies >100 GeV while its low-energy infill array DeepCore extends this to >10 GeV. This analysis uses data gathered in the austral winters between May 2011 and May 2014, corresponding to 532 days of livetime when the Sun, being below the horizon, is a source of up-going neutrino events, easiest to discriminate against the dominant background of atmospheric muons. The sensitivity is a factor of two to four better than previous searches due to additional statistics and improved analysis methods involving better background rejection and reconstructions. The resultant upper limits on the spin-dependent dark matter-proton scattering cross section reach down to 1.46 × 10 - 5 pb for a dark matter particle of mass 500 GeV annihilating exclusively into τ+τ-particles. These are currently the most stringent limits on the spin-dependent dark matter-proton scattering cross section for WIMP masses above 50 GeV.
Published: 2017

10. All-sky Search for Time-integrated Neutrino Emission from Astrophysical Sources with 7 yr of IceCube Data

Author: Aartsen, MG, Abraham, K, Ackermann, M, Adams, J, Aguilar, JA, Ahlers, M, Ahrens, M, Altmann, D, Andeen, K, Anderson, T, Ansseau, I, Anton, G, Archinger, M, Argüelles, C, Auffenberg, J, Axani, S, Bai, X, Barwick, SW, Baum, V, Bay, R, Beatty, JJ, Tjus, J Becker, Becker, K-H, BenZvi, S, Berley, D, Bernardini, E, Bernhard, A, Besson, DZ, Binder, G, Bindig, D, Bissok, M, Blaufuss, E, Blot, S, Bohm, C, Börner, M, Bos, F, Bose, D, Böser, S, Botner, O, Braun, J, Brayeur, L, Bretz, H-P, Bron, S, Burgman, A, Carver, T, Casier, M, Cheung, E, Chirkin, D, Christov, A, Clark, K, Classen, L, Coenders, S, Collin, GH, Conrad, JM, Cowen, DF, Cross, R, Day, M, de André, JPAM, De Clercq, C, del Pino Rosendo, E, Dembinski, H, De Ridder, S, Desiati, P, de Vries, KD, de Wasseige, G, de With, M, DeYoung, T, Díaz-Vélez, JC, di Lorenzo, V, Dujmovic, H, Dumm, JP, Dunkman, M, Eberhardt, B, Ehrhardt, T, Eichmann, B, Eller, P, Euler, S, Evenson, PA, Fahey, S, Fazely, AR, Feintzeig, J, Felde, J, Filimonov, K, Finley, C, Flis, S, Fösig, C-C, Franckowiak, A, Friedman, E, Fuchs, T, Gaisser, TK, Gallagher, J, Gerhardt, L, Ghorbani, K, Giang, W, Gladstone, L, Glauch, T, Glüsenkamp, T, Goldschmidt, A, Golup, G, and Gonzalez, JG
Subjects: Nuclear and Plasma Physics, Particle and High Energy Physics, Physical Sciences, astroparticle physics, galaxies: active, neutrinos, astro-ph.HE, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Physical Chemistry (incl. Structural), Astronomy & Astrophysics, Astronomical sciences, Particle and high energy physics, Space sciences
Abstract: Since the recent detection of an astrophysical flux of high-energy neutrinos, the question of its origin has not yet fully been answered. Much of what is known about this flux comes from a small event sample of high neutrino purity, good energy resolution, but large angular uncertainties. In searches for point-like sources, on the other hand, the best performance is given by using large statistics and good angular reconstructions. Track-like muon events produced in neutrino interactions satisfy these requirements. We present here the results of searches for point-like sources with neutrinos using data acquired by the IceCube detector over 7 yr from 2008 to 2015. The discovery potential of the analysis in the northern sky is now significantly below E2v doφ/dEv = 10-12 TeV cm-2 s-1, on average 38% lower than the sensitivity of the previously published analysis of 4 yr exposure. No significant clustering of neutrinos above background expectation was observed, and implications for prominent neutrino source candidates are discussed.
Published: 2017

11. First search for dark matter annihilations in the Earth with the IceCube detector

Author: Aartsen, MG, Abraham, K, Ackermann, M, Adams, J, Aguilar, JA, Ahlers, M, Ahrens, M, Altmann, D, Andeen, K, Anderson, T, Ansseau, I, Anton, G, Archinger, M, Argüelles, C, Auffenberg, J, Axani, S, Bai, X, Barwick, SW, Baum, V, Bay, R, Beatty, JJ, Becker Tjus, J, Becker, K-H, BenZvi, S, Berley, D, Bernardini, E, Bernhard, A, Besson, DZ, Binder, G, Bindig, D, Bissok, M, Blaufuss, E, Blot, S, Bohm, C, Börner, M, Bos, F, Bose, D, Böser, S, Botner, O, Braun, J, Brayeur, L, Bretz, H-P, Bron, S, Burgman, A, Carver, T, Casier, M, Cheung, E, Chirkin, D, Christov, A, Clark, K, Classen, L, Coenders, S, Collin, GH, Conrad, JM, Cowen, DF, Cross, R, Day, M, de André, JPAM, De Clercq, C, del Pino Rosendo, E, Dembinski, H, De Ridder, S, Desiati, P, de Vries, KD, de Wasseige, G, de With, M, DeYoung, T, Díaz-Vélez, JC, di Lorenzo, V, Dujmovic, H, Dumm, JP, Dunkman, M, Eberhardt, B, Ehrhardt, T, Eichmann, B, Eller, P, Euler, S, Evenson, PA, Fahey, S, Fazely, AR, Feintzeig, J, Felde, J, Filimonov, K, Finley, C, Flis, S, Fösig, C-C, Franckowiak, A, Friedman, E, Fuchs, T, Gaisser, TK, Gallagher, J, Gerhardt, L, Ghorbani, K, Giang, W, Gladstone, L, Glagla, M, Glauch, T, Glüsenkamp, T, Goldschmidt, A, and Golup, G
Subjects: Nuclear and Plasma Physics, Particle and High Energy Physics, Physical Sciences, astro-ph.HE, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics, Astronomical sciences, Atomic, molecular and optical physics, Particle and high energy physics
Abstract: We present the results of the first IceCube search for dark matter annihilation in the center of the Earth. Weakly interacting massive particles (WIMPs), candidates for dark matter, can scatter off nuclei inside the Earth and fall below its escape velocity. Over time the captured WIMPs will be accumulated and may eventually self-annihilate. Among the annihilation products only neutrinos can escape from the center of the Earth. Large-scale neutrino telescopes, such as the cubic kilometer IceCube Neutrino Observatory located at the South Pole, can be used to search for such neutrino fluxes. Data from 327 days of detector livetime during 2011/2012 were analyzed. No excess beyond the expected background from atmospheric neutrinos was detected. The derived upper limits on the annihilation rate of WIMPs in the Earth and the resulting muon flux are an order of magnitude stronger than the limits of the last analysis performed with data from IceCube’s predecessor AMANDA. The limits can be translated in terms of a spin-independent WIMP–nucleon cross section. For a WIMP mass of 50 GeV this analysis results in the most restrictive limits achieved with IceCube data.
Published: 2017

12. THE CONTRIBUTION OF FERMI-2LAC BLAZARS TO DIFFUSE TEV–PEV NEUTRINO FLUX

Author: Aartsen, MG, Abraham, K, Ackermann, M, Adams, J, Aguilar, JA, Ahlers, M, Ahrens, M, Altmann, D, Andeen, K, Anderson, T, Ansseau, I, Anton, G, Archinger, M, Arguelles, C, Arlen, TC, Auffenberg, J, Axani, S, Bai, X, Barwick, SW, Baum, V, Bay, R, Beatty, JJ, Tjus, J Becker, Becker, K-H, BenZvi, S, Berghaus, P, Berley, D, Bernardini, E, Bernhard, A, Besson, DZ, Binder, G, Bindig, D, Bissok, M, Blaufuss, E, Blot, S, Boersma, DJ, Bohm, C, Börner, M, Bos, F, Bose, D, Böser, S, Botner, O, Braun, J, Brayeur, L, Bretz, H-P, Burgman, A, Casey, J, Casier, M, Cheung, E, Chirkin, D, Christov, A, Clark, K, Classen, L, Coenders, S, Collin, GH, Conrad, JM, Cowen, DF, Silva, AH Cruz, Daughhetee, J, Davis, JC, Day, M, de André, JPAM, De Clercq, C, del Pino Rosendo, E, Dembinski, H, De Ridder, S, Desiati, P, de Vries, KD, de Wasseige, G, de With, M, DeYoung, T, Díaz-Vélez, JC, di Lorenzo, V, Dujmovic, H, Dumm, JP, Dunkman, M, Eberhardt, B, Ehrhardt, T, Eichmann, B, Euler, S, Evenson, PA, Fahey, S, Fazely, AR, Feintzeig, J, Felde, J, Filimonov, K, Finley, C, Flis, S, Fösig, C-C, Franckowiak, A, Fuchs, T, Gaisser, TK, Gaior, R, Gallagher, J, Gerhardt, L, Ghorbani, K, Giang, W, Gladstone, L, Glagla, M, and Glüsenkamp, T
Subjects: Nuclear and Plasma Physics, Particle and High Energy Physics, Physical Sciences, astroparticle physics, BL Lacertae objects: general, gamma rays: galaxies, methods: data analysis, neutrinos, quasars: general, astro-ph.HE, hep-ex, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Physical Chemistry (incl. Structural), Astronomy & Astrophysics, Astronomical sciences, Particle and high energy physics, Space sciences
Abstract: The recent discovery of a diffuse cosmic neutrino flux extending up to PeV energies raises the question of which astrophysical sources generate this signal. Blazars are one class of extragalactic sources which may produce such high-energy neutrinos. We present a likelihood analysis searching for cumulative neutrino emission from blazars in the 2nd Fermi-LAT AGN catalog (2LAC) using IceCube neutrino data set 2009-12, which was optimized for the detection of individual sources. In contrast to those in previous searches with IceCube, the populations investigated contain up to hundreds of sources, the largest one being the entire blazar sample in the 2LAC catalog. No significant excess is observed, and upper limits for the cumulative flux from these populations are obtained. These constrain the maximum contribution of 2LAC blazars to the observed astrophysical neutrino flux to 27% or less between around 10 TeV and 2 PeV, assuming the equipartition of flavors on Earth and a single power-law spectrum with a spectral index of -2.5. We can still exclude the fact that 2LAC blazars (and their subpopulations) emit more than 50% of the observed neutrinos up to a spectral index as hard as -2.2 in the same energy range. Our result takes into account the fact that the neutrino source count distribution is unknown, and it does not assume strict proportionality of the neutrino flux to the measured 2LAC γ-ray signal for each source. Additionally, we constrain recent models for neutrino emission by blazars.
Published: 2017

13. OBSERVATION AND CHARACTERIZATION OF A COSMIC MUON NEUTRINO FLUX FROM THE NORTHERN HEMISPHERE USING SIX YEARS OF ICECUBE DATA

Author: Aartsen, MG, Abraham, K, Ackermann, M, Adams, J, Aguilar, JA, Ahlers, M, Ahrens, M, Altmann, D, Andeen, K, Anderson, T, Ansseau, I, Anton, G, Archinger, M, Argüelles, C, Auffenberg, J, Axani, S, Bai, X, Barwick, SW, Baum, V, Bay, R, Beatty, JJ, Tjus, J Becker, Becker, K-H, BenZvi, S, Berghaus, P, Berley, D, Bernardini, E, Bernhard, A, Besson, DZ, Binder, G, Bindig, D, Bissok, M, Blaufuss, E, Blot, S, Bohm, C, Börner, M, Bos, F, Bose, D, Böser, S, Botner, O, Braun, J, Brayeur, L, Bretz, H-P, Burgman, A, Carver, T, Casier, M, Cheung, E, Chirkin, D, Christov, A, Clark, K, Classen, L, Coenders, S, Collin, GH, Conrad, JM, Cowen, DF, Cross, R, Day, M, de André, JPAM, De Clercq, C, del Pino Rosendo, E, Dembinski, H, De Ridder, S, Desiati, P, de Vries, KD, de Wasseige, G, de With, M, DeYoung, T, Díaz-Vélez, JC, di Lorenzo, V, Dujmovic, H, Dumm, JP, Dunkman, M, Eberhardt, B, Ehrhardt, T, Eichmann, B, Eller, P, Euler, S, Evenson, PA, Fahey, S, Fazely, AR, Feintzeig, J, Felde, J, Filimonov, K, Finley, C, Flis, S, Fösig, C-C, Franckowiak, A, Friedman, E, Fuchs, T, Gaisser, TK, Gallagher, J, Gerhardt, L, Ghorbani, K, Giang, W, Gladstone, L, Glagla, M, Glüsenkamp, T, Goldschmidt, A, Golup, G, and Gonzalez, JG
Subjects: astroparticle physics, methods: data analysis, neutrinos, astro-ph.HE, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Physical Chemistry (incl. Structural), Astronomy & Astrophysics
Abstract: The IceCube Collaboration has previously discovered a high-energy astrophysical neutrino flux using neutrino events with interaction vertices contained within the instrumented volume of the IceCube detector. We present a complementary measurement using charged current muon neutrino events where the interaction vertex can be outside this volume. As a consequence of the large muon range the effective area is significantly larger but the field of view is restricted to the Northern Hemisphere. IceCube data from 2009 through 2015 have been analyzed using a likelihood approach based on the reconstructed muon energy and zenith angle. At the highest neutrino energies between 194 TeV and 7.8 PeV a significant astrophysical contribution is observed, excluding a purely atmospheric origin of these events at 5.6s significance. The data are well described by an isotropic, unbroken power-law flux with a normalization at 100 TeV neutrino energy of (0.90 -0.27+0.30) × 10-18 Gev-1 cm-2 s-1 sr-1and a hard spectral index of γ = 2.13 ± 0.13. The observed spectrum is harder in comparison to previous IceCube analyses with lower energy thresholds which may indicate a break in the astrophysical neutrino spectrum of unknown origin. The highest-energy event observed has a reconstructed muon energy of (4.5 ± 1.2) PeV which implies a probability of less than 0.005% for this event to be of atmospheric origin. Analyzing the arrival directions of all events with reconstructed muon energies above 200 TeV no correlation with known γ-ray sources was found. Using the high statistics of atmospheric neutrinos we report the current best constraints on a prompt atmospheric muon neutrino flux originating from charmed meson decays which is below 1.06 in units of the flux normalization of the model in Enberg et al.
Published: 2016

14. SEARCH FOR SOURCES OF HIGH-ENERGY NEUTRONS WITH FOUR YEARS OF DATA FROM THE ICETOP DETECTOR

Author: Aartsen, MG, Abraham, K, Ackermann, M, Adams, J, Aguilar, JA, Ahlers, M, Ahrens, M, Altmann, D, Andeen, K, Anderson, T, Ansseau, I, Anton, G, Archinger, M, Argüelles, C, Auffenberg, J, Axani, S, Bai, X, Barwick, SW, Baum, V, Bay, R, Beatty, JJ, Tjus, J Becker, Becker, K-H, BenZvi, S, Berghaus, P, Berley, D, Bernardini, E, Bernhard, A, Besson, DZ, Binder, G, Bindig, D, Bissok, M, Blaufuss, E, Blot, S, Bohm, C, Börner, M, Bos, F, Bose, D, Böser, S, Botner, O, Braun, J, Brayeur, L, Bretz, H-P, Burgman, A, Carver, T, Casier, M, Cheung, E, Chirkin, D, Christov, A, Clark, K, Classen, L, Coenders, S, Collin, GH, Conrad, JM, Cowen, DF, Cross, R, Day, M, de André, JPAM, De Clercq, C, del Pino Rosendo, E, Dembinski, H, De Ridder, S, Desiati, P, de Vries, KD, de Wasseige, G, de With, M, DeYoung, T, Díaz-Vélez, JC, di Lorenzo, V, Dujmovic, H, Dumm, JP, Dunkman, M, Eberhardt, B, Ehrhardt, T, Eichmann, B, Eller, P, Euler, S, Evenson, PA, Fahey, S, Fazely, AR, Feintzeig, J, Felde, J, Filimonov, K, Finley, C, Flis, S, Fösig, C-C, Franckowiak, A, Friedman, E, Fuchs, T, Gaisser, TK, Gallagher, J, Gerhardt, L, Ghorbani, K, Giang, W, Gladstone, L, Glagla, M, Glüsenkamp, T, Goldschmidt, A, Golup, G, and Gonzalez, JG
Subjects: Affordable and Clean Energy, astroparticle physics, cosmic rays, methods: data analysis, astro-ph.HE, hep-ex, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Physical Chemistry (incl. Structural), Astronomy & Astrophysics
Abstract: IceTop is an air-shower array located on the Antarctic ice sheet at the geographic South Pole. IceTop can detect an astrophysical flux of neutrons from Galactic sources as an excess of cosmic-ray air showers arriving from the source direction. Neutrons are undeflected by the Galactic magnetic field and can typically travel 10 (E/PeV) pc before decay. Two searches are performed using 4 yr of the IceTop data set to look for a statistically significant excess of events with energies above 10 PeV (1016 eV) arriving within a small solid angle. The all-sky search method covers from -90° to approximately -50° in declination. No significant excess is found. A targeted search is also performed, looking for significant correlation with candidate sources in different target sets. This search uses a higher-energy cut (100 PeV) since most target objects lie beyond 1 kpc. The target sets include pulsars with confirmed TeV energy photon fluxes and high-mass X-ray binaries. No significant correlation is found for any target set. Flux upper limits are determined for both searches, which can constrain Galactic neutron sources and production scenarios.
Published: 2016

15. All-flavour search for neutrinos from dark matter annihilations in the Milky Way with IceCube/DeepCore

Author: Aartsen, MG, Abraham, K, Ackermann, M, Adams, J, Aguilar, JA, Ahlers, M, Ahrens, M, Altmann, D, Andeen, K, Anderson, T, Ansseau, I, Anton, G, Archinger, M, Arguelles, C, Arlen, TC, Auffenberg, J, Axani, S, Bai, X, Barwick, SW, Baum, V, Bay, R, Beatty, JJ, Becker Tjus, J, Becker, K-H, BenZvi, S, Berghaus, P, Berley, D, Bernardini, E, Bernhard, A, Besson, DZ, Binder, G, Bindig, D, Bissok, M, Blaufuss, E, Blot, S, Boersma, DJ, Bohm, C, Börner, M, Bos, F, Bose, D, Böser, S, Botner, O, Braun, J, Brayeur, L, Bretz, H-P, Burgman, A, Casey, J, Casier, M, Cheung, E, Chirkin, D, Christov, A, Clark, K, Classen, L, Coenders, S, Collin, GH, Conrad, JM, Cowen, DF, Cruz Silva, AH, Daughhetee, J, Davis, JC, Day, M, de André, JPAM, De Clercq, C, del Pino Rosendo, E, Dembinski, H, De Ridder, S, Desiati, P, de Vries, KD, de Wasseige, G, de With, M, DeYoung, T, Díaz-Vélez, JC, di Lorenzo, V, Dujmovic, H, Dumm, JP, Dunkman, M, Eberhardt, B, Ehrhardt, T, Eichmann, B, Euler, S, Evenson, PA, Fahey, S, Fazely, AR, Feintzeig, J, Felde, J, Filimonov, K, Finley, C, Flis, S, Fösig, C-C, Franckowiak, A, Fuchs, T, Gaisser, TK, Gaior, R, Gallagher, J, Gerhardt, L, Ghorbani, K, Giang, W, Gladstone, L, Glagla, M, and Glüsenkamp, T
Subjects: Nuclear and Plasma Physics, Particle and High Energy Physics, Physical Sciences, astro-ph.HE, hep-ex, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics, Astronomical sciences, Atomic, molecular and optical physics, Particle and high energy physics
Abstract: We present the first IceCube search for a signal of dark matter annihilations in the Milky Way using all-flavour neutrino-induced particle cascades. The analysis focuses on the DeepCore sub-detector of IceCube, and uses the surrounding IceCube strings as a veto region in order to select starting events in the DeepCore volume. We use 329 live-days of data from IceCube operating in its 86-string configuration during 2011–2012. No neutrino excess is found, the final result being compatible with the background-only hypothesis. From this null result, we derive upper limits on the velocity-averaged self-annihilation cross-section, ⟨ σAv ⟩ , for dark matter candidate masses ranging from 30 GeV up to 10 TeV, assuming both a cuspy and a flat-cored dark matter halo profile. For dark matter masses between 200 GeV and 10 TeV, the results improve on all previous IceCube results on ⟨ σAv ⟩ , reaching a level of 10- 23 cm3 s- 1, depending on the annihilation channel assumed, for a cusped NFW profile. The analysis demonstrates that all-flavour searches are competitive with muon channel searches despite the intrinsically worse angular resolution of cascades compared to muon tracks in IceCube.
Published: 2016

16. ANISOTROPY IN COSMIC-RAY ARRIVAL DIRECTIONS IN THE SOUTHERN HEMISPHERE BASED ON SIX YEARS OF DATA FROM THE ICECUBE DETECTOR

Author: Aartsen, MG, Abraham, K, Ackermann, M, Adams, J, Aguilar, JA, Ahlers, M, Ahrens, M, Altmann, D, Anderson, T, Ansseau, I, Anton, G, Archinger, M, Arguelles, C, Arlen, TC, Auffenberg, J, Bai, X, Barwick, SW, Baum, V, Bay, R, Beatty, JJ, Tjus, J Becker, Becker, K-H, Beiser, E, BenZvi, S, Berghaus, P, Berley, D, Bernardini, E, Bernhard, A, Besson, DZ, Binder, G, Bindig, D, Bissok, M, Blaufuss, E, Blumenthal, J, Boersma, DJ, Bohm, C, Börner, M, Bos, F, Bose, D, Böser, S, Botner, O, Braun, J, Brayeur, L, Bretz, H-P, Buzinsky, N, Casey, J, Casier, M, Cheung, E, Chirkin, D, Christov, A, Clark, K, Classen, L, Coenders, S, Collin, GH, Conrad, JM, Cowen, DF, Silva, AH Cruz, Daughhetee, J, Davis, JC, Day, M, de André, JPAM, De Clercq, C, del Pino Rosendo, E, Dembinski, H, De Ridder, S, Desiati, P, de Vries, KD, de Wasseige, G, de With, M, DeYoung, T, Díaz-Vélez, JC, di Lorenzo, V, Dujmovic, H, Dumm, JP, Dunkman, M, Eberhardt, B, Ehrhardt, T, Eichmann, B, Euler, S, Evenson, PA, Fahey, S, Fazely, AR, Feintzeig, J, Felde, J, Filimonov, K, Finley, C, Flis, S, Fösig, C-C, Fuchs, T, Gaisser, TK, Gaior, R, Gallagher, J, Gerhardt, L, Ghorbani, K, Gier, D, Gladstone, L, Glagla, M, Glüsenkamp, T, Goldschmidt, A, and Golup, G
Subjects: astroparticle physics, cosmic rays, astro-ph.HE, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Physical Chemistry (incl. Structural), Astronomy & Astrophysics
Abstract: The IceCube Neutrino Observatory accumulated a total of 318 billion cosmic-ray-induced muon events between 2009 May and 2015 May. This data set was used for a detailed analysis of the sidereal anisotropy in the arrival directions of cosmic rays in the TeV to PeV energy range. The observed global sidereal anisotropy features large regions of relative excess and deficit, with amplitudes of the order of 10-3 up to about 100 TeV. A decomposition of the arrival direction distribution into spherical harmonics shows that most of the power is contained in the low-multipole (ℓ ≤ 4) moments. However, higher multipole components are found to be statistically significant down to an angular scale of less than 10°, approaching the angular resolution of the detector. Above 100 TeV, a change in the morphology of the arrival direction distribution is observed, and the anisotropy is characterized by a wide relative deficit whose amplitude increases with primary energy up to at least 5 PeV, the highest energies currently accessible to IceCube. No time dependence of the large- and small-scale structures is observed in the period of six years covered by this analysis. The high-statistics data set reveals more details of the properties of the anisotropy and is potentially able to shed light on the various physical processes that are responsible for the complex angular structure and energy evolution.
Published: 2016

17. Neutrino oscillation studies with IceCube-DeepCore

Author: Aartsen, MG, Abraham, K, Ackermann, M, Adams, J, Aguilar, JA, Ahlers, M, Ahrens, M, Altmann, D, Anderson, T, Ansseau, I, Archinger, M, Arguelles, C, Arlen, TC, Auffenberg, J, Bai, X, Barwick, SW, Baum, V, Bay, R, Beatty, JJ, Tjus, J Becker, Becker, K-H, Beiser, E, Berghaus, P, Berley, D, Bernardini, E, Bernhard, A, Besson, DZ, Binder, G, Bindig, D, Bissok, M, Blaufuss, E, Blumenthal, J, Boersma, DJ, Bohm, C, Börner, M, Bos, F, Bose, D, Böser, S, Botner, O, Braun, J, Brayeur, L, Bretz, H-P, Buzinsky, N, Casey, J, Casier, M, Cheung, E, Chirkin, D, Christov, A, Clark, K, Classen, L, Coenders, S, Collin, GH, Conrad, JM, Cowen, DF, Silva, AH Cruz, Daughhetee, J, Davis, JC, Day, M, de André, JPAM, De Clercq, C, del Pino Rosendo, E, Dembinski, H, De Ridder, S, Desiati, P, de Vries, KD, de Wasseige, G, de With, M, DeYoung, T, Díaz-Vélez, JC, di Lorenzo, V, Dumm, JP, Dunkman, M, Eberhardt, B, Ehrhardt, T, Eichmann, B, Euler, S, Evenson, PA, Fahey, S, Fazely, AR, Feintzeig, J, Felde, J, Filimonov, K, Finley, C, Flis, S, Fösig, C-C, Fuchs, T, Gaisser, TK, Gaior, R, Gallagher, J, Gerhardt, L, Ghorbani, K, Gier, D, Gladstone, L, Glagla, M, Glüsenkamp, T, Goldschmidt, A, Golup, G, Gonzalez, JG, Góra, D, and Grant, D
Subjects: Nuclear and Plasma Physics, Particle and High Energy Physics, Physical Sciences, Mathematical Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics, Mathematical physics, Particle and high energy physics
Abstract: IceCube, a gigaton-scale neutrino detector located at the South Pole, was primarily designed to search for astrophysical neutrinos with energies of PeV and higher. This goal has been achieved with the detection of the highest energy neutrinos to date. At the other end of the energy spectrum, the DeepCore extension lowers the energy threshold of the detector to approximately 10 GeV and opens the door for oscillation studies using atmospheric neutrinos. An analysis of the disappearance of these neutrinos has been completed, with the results produced being complementary with dedicated oscillation experiments. Following a review of the detector principle and performance, the method used to make these calculations, as well as the results, is detailed. Finally, the future prospects of IceCube-DeepCore and the next generation of neutrino experiments at the South Pole (IceCube-Gen2, specifically the PINGU sub-detector) are briefly discussed.
Published: 2016

18. AN ALL-SKY SEARCH FOR THREE FLAVORS OF NEUTRINOS FROM GAMMA-RAY BURSTS WITH THE ICECUBE NEUTRINO OBSERVATORY

Author: Aartsen, MG, Abraham, K, Ackermann, M, Adams, J, Aguilar, JA, Ahlers, M, Ahrens, M, Altmann, D, Anderson, T, Ansseau, I, Anton, G, Archinger, M, Arguelles, C, Arlen, TC, Auffenberg, J, Bai, X, Barwick, SW, Baum, V, Bay, R, Beatty, JJ, Tjus, J Becker, Becker, K-H, Beiser, E, BenZvi, S, Berghaus, P, Berley, D, Bernardini, E, Bernhard, A, Besson, DZ, Binder, G, Bindig, D, Bissok, M, Blaufuss, E, Blumenthal, J, Boersma, DJ, Bohm, C, Börner, M, Bos, F, Bose, D, Böser, S, Botner, O, Braun, J, Brayeur, L, Bretz, H-P, Buzinsky, N, Casey, J, Casier, M, Cheung, E, Chirkin, D, Christov, A, Clark, K, Classen, L, Coenders, S, Collin, GH, Conrad, JM, Cowen, DF, Silva, AH Cruz, Daughhetee, J, Davis, JC, Day, M, de André, JPAM, De Clercq, C, del Pino Rosendo, E, Dembinski, H, De Ridder, S, Desiati, P, de Vries, KD, de Wasseige, G, de With, M, DeYoung, T, Díaz-Vélez, JC, di Lorenzo, V, Dujmovic, H, Dumm, JP, Dunkman, M, Eberhardt, B, Ehrhardt, T, Eichmann, B, Euler, S, Evenson, PA, Fahey, S, Fazely, AR, Feintzeig, J, Felde, J, Filimonov, K, Finley, C, Flis, S, Fösig, C-C, Fuchs, T, Gaisser, TK, Gaior, R, Gallagher, J, Gerhardt, L, Ghorbani, K, Gier, D, Gladstone, L, Glagla, M, Glüsenkamp, T, Goldschmidt, A, and Golup, G
Subjects: gamma-ray burst: general, methods: data analysis, neutrinos, telescopes, astro-ph.HE, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Physical Chemistry (incl. Structural), Astronomy & Astrophysics
Abstract: We present the results and methodology of a search for neutrinos produced in the decay of charged pions created in interactions between protons and gamma-rays during the prompt emission of 807 gamma-ray bursts (GRBs) over the entire sky. This three-year search is the first in IceCube for shower-like Cherenkov light patterns from electron, muon, and tau neutrinos correlated with GRBs. We detect five low-significance events correlated with five GRBs. These events are consistent with the background expectation from atmospheric muons and neutrinos. The results of this search in combination with those of IceCube's four years of searches for track-like Cherenkov light patterns from muon neutrinos correlated with Northern-Hemisphere GRBs produce limits that tightly constrain current models of neutrino and ultra high energy cosmic ray production in GRB fireballs.
Published: 2016

19. Characterization of the atmospheric muon flux in IceCube

Author: Aartsen, MG, Abraham, K, Ackermann, M, Adams, J, Aguilar, JA, Ahlers, M, Ahrens, M, Altmann, D, Anderson, T, Archinger, M, Argüelles, C, Arlen, TC, Auffenberg, J, Bai, X, Barwick, SW, Baum, V, Bay, R, Beatty, JJ, Tjus, J Becker, Becker, K-H, Beiser, E, BenZvi, S, Berghaus, P, Berley, D, Bernardini, E, Bernhard, A, Besson, DZ, Binder, G, Bindig, D, Bissok, M, Blaufuss, E, Blumenthal, J, Boersma, DJ, Bohm, C, Börner, M, Bos, F, Bose, D, Böser, S, Botner, O, Braun, J, Brayeur, L, Bretz, H-P, Brown, AM, Buzinsky, N, Casey, J, Casier, M, Cheung, E, Chirkin, D, Christov, A, Christy, B, Clark, K, Classen, L, Coenders, S, Cowen, DF, Silva, AH Cruz, Daughhetee, J, Davis, JC, Day, M, de André, JPAM, De Clercq, C, Dembinski, H, De Ridder, S, Desiati, P, de Vries, KD, de Wasseige, G, de With, M, DeYoung, T, Díaz-Vélez, JC, Dumm, JP, Dunkman, M, Eagan, R, Eberhardt, B, Ehrhardt, T, Eichmann, B, Euler, S, Evenson, PA, Fadiran, O, Fahey, S, Fazely, AR, Fedynitch, A, Feintzeig, J, Felde, J, Filimonov, K, Finley, C, Fischer-Wasels, T, Flis, S, Fuchs, T, Glagla, M, Gaisser, TK, Gaior, R, Gallagher, J, Gerhardt, L, Ghorbani, K, Gier, D, Gladstone, L, Glüsenkamp, T, Goldschmidt, A, Golup, G, Gonzalez, JG, and Góra, D
Subjects: Nuclear and Plasma Physics, Particle and High Energy Physics, Physical Sciences, Atmospheric muons, Cosmic rays, Prompt leptons, astro-ph.HE, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Nuclear & Particles Physics, Astronomical sciences, Particle and high energy physics
Abstract: Muons produced in atmospheric cosmic ray showers account for the by far dominant part of the event yield in large-volume underground particle detectors. The IceCube detector, with an instrumented volume of about a cubic kilometer, has the potential to conduct unique investigations on atmospheric muons by exploiting the large collection area and the possibility to track particles over a long distance. Through detailed reconstruction of energy deposition along the tracks, the characteristics of muon bundles can be quantified, and individual particles of exceptionally high energy identified. The data can then be used to constrain the cosmic ray primary flux and the contribution to atmospheric lepton fluxes from prompt decays of short-lived hadrons. In this paper, techniques for the extraction of physical measurements from atmospheric muon events are described and first results are presented. The multiplicity spectrum of TeV muons in cosmic ray air showers for primaries in the energy range from the knee to the ankle is derived and found to be consistent with recent results from surface detectors. The single muon energy spectrum is determined up to PeV energies and shows a clear indication for the emergence of a distinct spectral component from prompt decays of short-lived hadrons. The magnitude of the prompt flux, which should include a substantial contribution from light vector meson di-muon decays, is consistent with current theoretical predictions. The variety of measurements and high event statistics can also be exploited for the evaluation of systematic effects. In the course of this study, internal inconsistencies in the zenith angle distribution of events were found which indicate the presence of an unexplained effect outside the currently applied range of detector systematics. The underlying cause could be related to the hadronic interaction models used to describe muon production in air showers.
Published: 2016

20. Improved limits on dark matter annihilation in the Sun with the 79-string IceCube detector and implications for supersymmetry

Author: Aartsen, MG, Abraham, K, Ackermann, M, Adams, J, Aguilar, JA, Ahlers, M, Ahrens, M, Altmann, D, Anderson, T, Ansseau, I, Anton, G, Archinger, M, Arguelles, C, Arlen, TC, Auffenberg, J, Bai, X, Barwick, SW, Baum, V, Bay, R, Beatty, JJ, Tjus, JB, Becker, KH, Beiser, E, Benzvi, S, Berghaus, P, Berley, D, Bernardini, E, Bernhard, A, Besson, DZ, Binder, G, Bindig, D, Bissok, M, Blaufuss, E, Blumenthal, J, Boersma, DJ, Bohm, C, Börner, M, Bos, F, Bose, D, Böser, S, Botner, O, Braun, J, Brayeur, L, Bretz, HP, Buzinsky, N, Casey, J, Casier, M, Cheung, E, Chirkin, D, Christov, A, Clark, K, Classen, L, Coenders, S, Collin, GH, Conrad, JM, Cowen, DF, Silva, AHC, Danninger, M, Daughhetee, J, Davis, JC, Day, M, De André, JPAM, Clercq, CD, Rosendo, EDP, Dembinski, H, Ridder, SD, Desiati, P, De Vries, KD, De Wasseige, G, De With, M, Deyoung, T, Díaz-Vélez, JC, Di Lorenzo, V, Dumm, JP, Dunkman, M, Eberhardt, B, Edsjö, J, Ehrhardt, T, Eichmann, B, Euler, S, Evenson, PA, Fahey, S, Fazely, AR, Feintzeig, J, Felde, J, Filimonov, K, Finley, C, Flis, S, Fösig, CC, Fuchs, T, Gaisser, TK, Gaior, R, Gallagher, J, Gerhardt, L, Ghorbani, K, Gier, D, Gladstone, L, Glagla, M, Glüsenkamp, T, and Goldschmidt, A
Subjects: dark matter experiments, dark matter theory, neutrino experiments, hep-ph, astro-ph.CO, hep-ex, Nuclear & Particles Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics
Abstract: We present an improved event-level likelihood formalism for including neutrino telescope data in global fits to new physics. We derive limits on spin-dependent dark matter-proton scattering by employing the new formalism in a re-analysis of data from the 79-string IceCube search for dark matter annihilation in the Sun, including explicit energy information for each event. The new analysis excludes a number of models in the weak-scale minimal supersymmetric standard model (MSSM) for the first time. This work is accompanied by the public release of the 79-string IceCube data, as well as an associated computer code for applying the new likelihood to arbitrary dark matter models.
Published: 2016

21. Searches for relativistic magnetic monopoles in IceCube

Author: Aartsen, MG, Abraham, K, Ackermann, M, Adams, J, Aguilar, JA, Ahlers, M, Ahrens, M, Altmann, D, Anderson, T, Ansseau, I, Archinger, M, Arguelles, C, Arlen, TC, Auffenberg, J, Bai, X, Barwick, SW, Baum, V, Bay, R, Beatty, JJ, Tjus, JB, Becker, KH, Beiser, E, Benabderrahmane, ML, Berghaus, P, Berley, D, Bernardini, E, Bernhard, A, Besson, DZ, Binder, G, Bindig, D, Bissok, M, Blaufuss, E, Blumenthal, J, Boersma, DJ, Bohm, C, Börner, M, Bos, F, Bose, D, Böser, S, Botner, O, Braun, J, Brayeur, L, Bretz, HP, Buzinsky, N, Casey, J, Casier, M, Cheung, E, Chirkin, D, Christov, A, Clark, K, Classen, L, Coenders, S, Cowen, DF, Cruz Silva, AH, Daughhetee, J, Davis, JC, Day, M, de André, JPAM, De Clercq, C, del Pino Rosendo, E, Dembinski, H, De Ridder, S, Desiati, P, de Vries, KD, de Wasseige, G, de With, M, DeYoung, T, Díaz-Vélez, JC, di Lorenzo, V, Dumm, JP, Dunkman, M, Eberhardt, B, Ehrhardt, T, Eichmann, B, Euler, S, Evenson, PA, Fahey, S, Fazely, AR, Feintzeig, J, Felde, J, Filimonov, K, Finley, C, Fischer-Wasels, T, Flis, S, Fösig, CC, Fuchs, T, Gaisser, TK, Gaior, R, Gallagher, J, Gerhardt, L, Ghorbani, K, Gier, D, Gladstone, L, Glagla, M, Glüsenkamp, T, Goldschmidt, A, Golup, G, Gonzalez, JG, Góra, D, and Grant, D
Subjects: astro-ph.HE, Nuclear & Particles Physics, Quantum Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics
Abstract: Various extensions of the Standard Model motivate the existence of stable magnetic monopoles that could have been created during an early high-energy epoch of the Universe. These primordial magnetic monopoles would be gradually accelerated by cosmic magnetic fields and could reach high velocities that make them visible in Cherenkov detectors such as IceCube. Equivalently to electrically charged particles, magnetic monopoles produce direct and indirect Cherenkov light while traversing through matter at relativistic velocities. This paper describes searches for relativistic ((Formula presented.)) and mildly relativistic ((Formula presented.)) monopoles, each using one year of data taken in 2008/2009 and 2011/2012, respectively. No monopole candidate was detected. For a velocity above (Formula presented.) the monopole flux is constrained down to a level of (Formula presented.). This is an improvement of almost two orders of magnitude over previous limits.
Published: 2016

22. Search for correlations between the arrival directions of IceCube neutrino events and ultrahigh-energy cosmic rays detected by the Pierre Auger Observatory and the Telescope Array

Author: Aartsen, MG, Abraham, K, Ackermann, M, Adams, J, Aguilar, JA, Ahlers, M, Ahrens, M, Altmann, D, Anderson, T, Ansseau, I, Archinger, M, Arguelles, C, Arlen, TC, Auffenberg, J, Bai, X, Barwick, SW, Baum, V, Bay, R, Beatty, JJ, Becker Tjus, J, Becker, KH, Beiser, E, Berghaus, P, Berley, D, Bernardini, E, Bernhard, A, Besson, DZ, Binder, G, Bindig, D, Bissok, M, Blaufuss, E, Blumenthal, J, Boersma, DJ, Bohm, C, Börner, M, Bos, F, Bose, D, Böser, S, Botner, O, Braun, J, Brayeur, L, Bretz, HP, Buzinsky, N, Casey, J, Casier, M, Cheung, E, Chirkin, D, Christov, A, Clark, K, Classen, L, Coenders, S, Cowen, DF, Cruz Silva, AH, Daughhetee, J, Davis, JC, Day, M, De André, JPAM, De Clercq, C, Del Pino Rosendo, E, Dembinski, H, De Ridder, S, Desiati, P, De Vries, KD, De Wasseige, G, De With, M, DeYoung, T, Díaz-Vélez, JC, Di Lorenzo, V, Dumm, JP, Dunkman, M, Eberhardt, B, Ehrhardt, T, Eichmann, B, Euler, S, Evenson, PA, Fahey, S, Fazely, AR, Feintzeig, J, Felde, J, Filimonov, K, Finley, C, Fischer-Wasels, T, Flis, S, Fösig, CC, Fuchs, T, Gaisser, TK, Gaior, R, Gallagher, J, Gerhardt, L, Ghorbani, K, Gier, D, Gladstone, L, Glagla, M, Glüsenkamp, T, Goldschmidt, A, Golup, G, Gonzalez, JG, Góra, D, Grant, D, and Griffith, Z
Subjects: neutrino experiments, ultra high energy cosmic rays, cosmic ray experiments, neutrino astronomy, astro-ph.HE, Nuclear & Particles Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics
Abstract: This paper presents the results of different searches for correlations between very high-energy neutrino candidates detected by IceCube and the highest-energy cosmic rays measured by the Pierre Auger Observatory and the Telescope Array. We first consider samples of cascade neutrino events and of high-energy neutrino-induced muon tracks, which provided evidence for a neutrino flux of astrophysical origin, and study their cross-correlation with the ultrahigh-energy cosmic ray (UHECR) samples as a function of angular separation. We also study their possible directional correlations using a likelihood method stacking the neutrino arrival directions and adopting different assumptions on the size of the UHECR magnetic deflections. Finally, we perform another likelihood analysis stacking the UHECR directions and using a sample of through-going muon tracks optimized for neutrino point-source searches with sub-degree angular resolution. No indications of correlations at discovery level are obtained for any of the searches performed. The smallest of the p-values comes from the search for correlation between UHECRs with IceCube high-energy cascades, a result that should continue to be monitored.
Published: 2016

23. Search for astrophysical tau neutrinos in three years of IceCube data

Author: Aartsen, MG, Abraham, K, Ackermann, M, Adams, J, Aguilar, JA, Ahlers, M, Ahrens, M, Altmann, D, Anderson, T, Ansseau, I, Archinger, M, Arguelles, C, Arlen, TC, Auffenberg, J, Bai, X, Barwick, SW, Baum, V, Bay, R, Beatty, JJ, Tjus, J Becker, Becker, K-H, Beiser, E, BenZvi, S, Berghaus, P, Berley, D, Bernardini, E, Bernhard, A, Besson, DZ, Binder, G, Bindig, D, Bissok, M, Blaufuss, E, Blumenthal, J, Boersma, DJ, Bohm, C, Börner, M, Bos, F, Bose, D, Böser, S, Botner, O, Braun, J, Brayeur, L, Bretz, H-P, Buzinsky, N, Casey, J, Casier, M, Cheung, E, Chirkin, D, Christov, A, Clark, K, Classen, L, Coenders, S, Cowen, DF, Silva, AH Cruz, Daughhetee, J, Davis, JC, Day, M, de André, JPAM, De Clercq, C, del Pino Rosendo, E, Dembinski, H, De Ridder, S, Desiati, P, de Vries, KD, de Wasseige, G, de With, M, DeYoung, T, Díaz-Vélez, JC, di Lorenzo, V, Dumm, JP, Dunkman, M, Eagan, R, Eberhardt, B, Ehrhardt, T, Eichmann, B, Euler, S, Evenson, PA, Fadiran, O, Fahey, S, Fazely, AR, Fedynitch, A, Feintzeig, J, Felde, J, Filimonov, K, Finley, C, Fischer-Wasels, T, Flis, S, Fösig, C-C, Fuchs, T, Gaisser, TK, Gaior, R, Gallagher, J, Gerhardt, L, Ghorbani, K, Gier, D, Gladstone, L, Glagla, M, Glüsenkamp, T, Goldschmidt, A, and Golup, G
Subjects: astro-ph.HE, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics
Abstract: The IceCube Neutrino Observatory has observed a diffuse flux of TeV-PeV astrophysical neutrinos at 5.7σ significance from an all-flavor search. The direct detection of tau neutrinos in this flux has yet to occur. Tau neutrinos become distinguishable from other flavors in IceCube at energies above a few hundred TeV, when the cascade from the tau neutrino charged current interaction becomes resolvable from the cascade from the tau lepton decay. This paper presents results from the first dedicated search for tau neutrinos with energies between 214 TeV and 72 PeV in the full IceCube detector. The analysis searches for IceCube optical sensors that observe two separate pulses in a single event - one from the tau neutrino interaction and a second from the tau decay. No candidate events were observed in three years of IceCube data. For the first time, a differential upper limit on astrophysical tau neutrinos is derived around the PeV energy region, which is nearly 3 orders of magnitude lower in energy than previous limits from dedicated tau neutrino searches.
Published: 2016

24. THE SEARCH for TRANSIENT ASTROPHYSICAL NEUTRINO EMISSION with ICECUBE-DEEPCORE

Author: Aartsen, MG, Abraham, K, Ackermann, M, Adams, J, Aguilar, JA, Ahlers, M, Ahrens, M, Altmann, D, Anderson, T, Ansseau, I, Archinger, M, Arguelles, C, Arlen, TC, Auffenberg, J, Bai, X, Barwick, SW, Baum, V, Bay, R, Beatty, JJ, Becker Tjus, J, Becker, KH, Beiser, E, Benzvi, S, Berghaus, P, Berley, D, Bernardini, E, Bernhard, A, Besson, DZ, Binder, G, Bindig, D, Bissok, M, Blaufuss, E, Blumenthal, J, Boersma, DJ, Bohm, C, Börner, M, Bos, F, Bose, D, Böser, S, Botner, O, Braun, J, Brayeur, L, Bretz, HP, Buzinsky, N, Casey, J, Casier, M, Cheung, E, Chirkin, D, Christov, A, Clark, K, Classen, L, Coenders, S, Cowen, DF, Cruz Silva, AH, Daughhetee, J, Davis, JC, Day, M, De André, JPAM, De Clercq, C, Del Pino Rosendo, E, Dembinski, H, De Ridder, S, Desiati, P, De Vries, KD, De Wasseige, G, De With, M, Deyoung, T, Díaz-Vélez, JC, Di Lorenzo, V, Dumm, JP, Dunkman, M, Eagan, R, Eberhardt, B, Ehrhardt, T, Eichmann, B, Euler, S, Evenson, PA, Fadiran, O, Fahey, S, Fazely, AR, Fedynitch, A, Feintzeig, J, Felde, J, Filimonov, K, Finley, C, Fischer-Wasels, T, Flis, S, Fösig, CC, Fuchs, T, Gaisser, TK, Gaior, R, Gallagher, J, Gerhardt, L, Ghorbani, K, Gier, D, Gladstone, L, Glagla, M, Glüsenkamp, T, Goldschmidt, A, and Golup, G
Subjects: astroparticle physics, gamma-ray burst: general, neutrinos, supernovae: general, astro-ph.HE, Astronomy & Astrophysics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Physical Chemistry, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Physical Chemistry (incl. Structural)
Abstract: We present the results of a search for astrophysical sources of brief transient neutrino emission using Ice Cube and Deep Core data acquired between 2012 May 15 and 2013 April 30. While the search methods employed in this analysis are similar to those used in previous Ice Cube point source searches, the data set being examined consists of a sample of predominantly sub-TeV muon-neutrinos from the Northern Sky (-5° < δ < 90°) obtained through a novel event selection method. This search represents a first attempt by Ice Cube to identify astrophysical neutrino sources in this relatively unexplored energy range. The reconstructed direction and time of arrival of neutrino events are used to search for any significant self-correlation in the data set. The data revealed no significant source of transient neutrino emission. This result has been used to construct limits at timescales ranging from roughly 1 s to 10 days for generic soft-spectra transients. We also present limits on a specific model of neutrino emission from soft jets in core-collapse supernovae.
Published: 2016

25. A first search for cosmogenic neutrinos with the ARIANNA Hexagonal Radio Array

Author: Barwick, SW, Berg, EC, Besson, DZ, Binder, G, Binns, WR, Boersma, DJ, Bose, RG, Braun, DL, Buckley, JH, Bugaev, V, Buitink, S, Dookayka, K, Dowkontt, PF, Duffin, T, Euler, S, Gerhardt, L, Gustafsson, L, Hallgren, A, Hanson, JC, Israel, MH, Kiryluk, J, Klein, SR, Kleinfelder, S, Niederhausen, H, Olevitch, MA, Persichelli, C, Ratzlaff, K, Rauch, BF, Reed, C, Roumi, M, Samanta, A, Simburger, GE, Stezelberger, T, Tatar, J, Uggerhoj, UI, Walker, J, Yodh, G, Young, R, and Collaboration, ARIANNA
Subjects: Radio, Antarctica, Neutrino, Cosmogenic, GZK, High energy, astro-ph.HE, astro-ph.IM, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Nuclear & Particles Physics
Abstract: The ARIANNA experiment seeks to observe the diffuse flux of neutrinos in the 108-1010 GeV energy range using a grid of radio detectors at the surface of the Ross Ice Shelf of Antarctica. The detector measures the coherent Cherenkov radiation produced at radio frequencies, from about 100 MHz-1 GHz, by charged particle showers generated by neutrino interactions in the ice. The ARIANNA Hexagonal Radio Array (HRA) is being constructed as a prototype for the full array. During the 2013-14 austral summer, three HRA stations collected radio data which was wirelessly transmitted off site in nearly real-time. The performance of these stations is described and a simple analysis to search for neutrino signals is presented. The analysis employs a set of three cuts that reject background triggers while preserving 90% of simulated cosmogenic neutrino triggers. No neutrino candidates are found in the data and a model-independent 90% confidence level Neyman upper limit is placed on the all flavor ν+ν¯ flux in a sliding decade-wide energy bin. The limit reaches a minimum of 1.9×10-23GeV-1cm-2s-1sr-1 in the 108.5-109.5 GeV energy bin. Simulations of the performance of the full detector are also described. The sensitivity of the full ARIANNA experiment is presented and compared with current neutrino flux models.
Published: 2015

26. Search for dark matter annihilation in the Galactic Center with IceCube-79

Author: Aartsen, MG, Abraham, K, Ackermann, M, Adams, J, Aguilar, JA, Ahlers, M, Ahrens, M, Altmann, D, Anderson, T, Archinger, M, Arguelles, C, Arlen, TC, Auffenberg, J, Bai, X, Barwick, SW, Baum, V, Bay, R, Beatty, JJ, Becker Tjus, J, Becker, K-H, Beiser, E, BenZvi, S, Berghaus, P, Berley, D, Bernardini, E, Bernhard, A, Besson, DZ, Binder, G, Bindig, D, Bissok, M, Blaufuss, E, Blumenthal, J, Boersma, DJ, Bohm, C, Börner, M, Bos, F, Bose, D, Böser, S, Botner, O, Braun, J, Brayeur, L, Bretz, H-P, Brown, AM, Buzinsky, N, Casey, J, Casier, M, Cheung, E, Chirkin, D, Christov, A, Christy, B, Clark, K, Classen, L, Coenders, S, Cowen, DF, Cruz Silva, AH, Daughhetee, J, Davis, JC, Day, M, de André, JPAM, De Clercq, C, Dembinski, H, De Ridder, S, Desiati, P, de Vries, KD, de Wasseige, G, de With, M, DeYoung, T, Díaz-Vélez, JC, Dumm, JP, Dunkman, M, Eagan, R, Eberhardt, B, Ehrhardt, T, Eichmann, B, Euler, S, Evenson, PA, Fadiran, O, Fahey, S, Fazely, AR, Fedynitch, A, Feintzeig, J, Felde, J, Filimonov, K, Finley, C, Fischer-Wasels, T, Flis, S, Fuchs, T, Glagla, M, Gaisser, TK, Gaior, R, Gallagher, J, Gerhardt, L, Ghorbani, K, Gier, D, Gladstone, L, Glüsenkamp, T, Goldschmidt, A, Golup, G, Gonzalez, JG, and Góra, D
Subjects: Nuclear and Plasma Physics, Particle and High Energy Physics, Physical Sciences, astro-ph.HE, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics, Astronomical sciences, Atomic, molecular and optical physics, Particle and high energy physics
Abstract: The Milky Way is expected to be embedded in a halo of dark matter particles, with the highest density in the central region, and decreasing density with the halo-centric radius. Dark matter might be indirectly detectable at Earth through a flux of stable particles generated in dark matter annihilations and peaked in the direction of the Galactic Center. We present a search for an excess flux of muon (anti-) neutrinos from dark matter annihilation in the Galactic Center using the cubic-kilometer-sized IceCube neutrino detector at the South Pole. There, the Galactic Center is always seen above the horizon. Thus, new and dedicated veto techniques against atmospheric muons are required to make the southern hemisphere accessible for IceCube. We used 319.7 live-days of data from IceCube operating in its 79-string configuration during 2010 and 2011. No neutrino excess was found and the final result is compatible with the background. We present upper limits on the self-annihilation cross-section, (Formula presented.), for WIMP masses ranging from 30 GeV up to 10 TeV, assuming cuspy (NFW) and flat-cored (Burkert) dark matter halo profiles, reaching down to ≃4·10-24 cm3 s-1, and ≃2.6·10-23 cm3 s-1 for the νν¯ channel, respectively.
Published: 2015

27. THE DETECTION of A SN IIn in OPTICAL FOLLOW-UP OBSERVATIONS of ICECUBE NEUTRINO EVENTS

Author: Aartsen, MG, Abraham, K, Ackermann, M, Adams, J, Aguilar, JA, Ahlers, M, Ahrens, M, Altmann, D, Anderson, T, Archinger, M, Arguelles, C, Arlen, TC, Auffenberg, J, Bai, X, Barwick, SW, Baum, V, Bay, R, Beatty, JJ, Becker Tjus, J, Becker, KH, Beiser, E, Benzvi, S, Berghaus, P, Berley, D, Bernardini, E, Bernhard, A, Besson, DZ, Binder, G, Bindig, D, Bissok, M, Blaufuss, E, Blumenthal, J, Boersma, DJ, Bohm, C, Börner, M, Bos, F, Bose, D, Böser, S, Botner, O, Braun, J, Brayeur, L, Bretz, HP, Brown, AM, Buzinsky, N, Casey, J, Casier, M, Cheung, E, Chirkin, D, Christov, A, Christy, B, Clark, K, Classen, L, Coenders, S, Cowen, DF, Cruz Silva, AH, Daughhetee, J, Davis, JC, Day, M, De André, JPAM, De Clercq, C, Dembinski, H, De Ridder, S, Desiati, P, De Vries, KD, De Wasseige, G, De With, M, Deyoung, T, Díaz-Vélez, JC, Dumm, JP, Dunkman, M, Eagan, R, Eberhardt, B, Ehrhardt, T, Eichmann, B, Euler, S, Evenson, PA, Fadiran, O, Fahey, S, Fazely, AR, Fedynitch, A, Feintzeig, J, Felde, J, Filimonov, K, Finley, C, Fischer-Wasels, T, Flis, S, Fuchs, T, Glagla, M, Gaisser, TK, Gaior, R, Gallagher, J, Gerhardt, L, Ghorbani, K, Gier, D, Gladstone, L, Glüsenkamp, T, Goldschmidt, A, Golup, G, Gonzalez, JG, and Góra, D
Subjects: circumstellar matter, galaxies: dwarf, neutrinos, shock waves, supernovae: individual, astro-ph.HE, 85-05, Astronomy & Astrophysics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Physical Chemistry (incl. Structural)
Abstract: The IceCube neutrino observatory pursues a follow-up program selecting interesting neutrino events in real-time and issuing alerts for electromagnetic follow-up observations. In 2012 March, the most significant neutrino alert during the first three years of operation was issued by IceCube. In the follow-up observations performed by the Palomar Transient Factory (PTF), a Type IIn supernova (SN IIn) PTF12csy was found 0.°2 away from the neutrino alert direction, with an error radius of 0.°54. It has a redshift of z = 0.0684, corresponding to a luminosity distance of about 300 Mpc and the Pan-STARRS1 survey shows that its explosion time was at least 158 days (in host galaxy rest frame) before the neutrino alert, so that a causal connection is unlikely. The a posteriori significance of the chance detection of both the neutrinos and the SN at any epoch is 2.2σ within IceCube's 2011/12 data acquisition season. Also, a complementary neutrino analysis reveals no long-term signal over the course of one year. Therefore, we consider the SN detection coincidental and the neutrinos uncorrelated to the SN. However, the SN is unusual and interesting by itself: it is luminous and energetic, bearing strong resemblance to the SN IIn 2010jl, and shows signs of interaction of the SN ejecta with a dense circumstellar medium. High-energy neutrino emission is expected in models of diffusive shock acceleration, but at a low, non-detectable level for this specific SN. In this paper, we describe the SN PTF12csy and present both the neutrino and electromagnetic data, as well as their analysis.
Published: 2015

28. A COMBINED MAXIMUM-LIKELIHOOD ANALYSIS OF THE HIGH-ENERGY ASTROPHYSICAL NEUTRINO FLUX MEASURED WITH ICECUBE

Author: Aartsen, MG, Abraham, K, Ackermann, M, Adams, J, Aguilar, JA, Ahlers, M, Ahrens, M, Altmann, D, Anderson, T, Archinger, M, Arguelles, C, Arlen, TC, Auffenberg, J, Bai, X, Barwick, SW, Baum, V, Bay, R, Beatty, JJ, Tjus, J Becker, Becker, K-H, Beiser, E, BenZvi, S, Berghaus, P, Berley, D, Bernardini, E, Bernhard, A, Besson, DZ, Binder, G, Bindig, D, Bissok, M, Blaufuss, E, Blumenthal, J, Boersma, DJ, Bohm, C, Börner, M, Bos, F, Bose, D, Böser, S, Botner, O, Braun, J, Brayeur, L, Bretz, H-P, Brown, AM, Buzinsky, N, Casey, J, Casier, M, Cheung, E, Chirkin, D, Christov, A, Christy, B, Clark, K, Classen, L, Coenders, S, Cowen, DF, Silva, AH Cruz, Daughhetee, J, Davis, JC, Day, M, de André, JPAM, De Clercq, C, Dembinski, H, De Ridder, S, Desiati, P, de Vries, KD, de Wasseige, G, de With, M, DeYoung, T, Díaz-Vélez, JC, Dumm, JP, Dunkman, M, Eagan, R, Eberhardt, B, Ehrhardt, T, Eichmann, B, Euler, S, Evenson, PA, Fadiran, O, Fahey, S, Fazely, AR, Fedynitch, A, Feintzeig, J, Felde, J, Filimonov, K, Finley, C, Fischer-Wasels, T, Flis, S, Fuchs, T, Gaisser, TK, Gaior, R, Gallagher, J, Gerhardt, L, Ghorbani, K, Gier, D, Gladstone, L, Glagla, M, Glüsenkamp, T, Goldschmidt, A, Golup, G, Gonzalez, JG, and Goodman, JA
Subjects: Nuclear and Plasma Physics, Particle and High Energy Physics, Physical Sciences, astroparticle physics, methods: data analysis, neutrinos, astro-ph.HE, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Physical Chemistry (incl. Structural), Astronomy & Astrophysics, Astronomical sciences, Particle and high energy physics, Space sciences
Abstract: Evidence for an extraterrestrial flux of high-energy neutrinos has now been found in multiple searches with the IceCube detector. The first solid evidence was provided by a search for neutrino events with deposited energies ≳30 TeV and interaction vertices inside the instrumented volume. Recent analyses suggest that the extraterrestrial flux extends to lower energies and is also visible with throughgoing, νμ-induced tracks from the Northern Hemisphere. Here, we combine the results from six different IceCube searches for astrophysical neutrinos in a maximum-likelihood analysis. The combined event sample features high-statistics samples of shower-like and track-like events. The data are fit in up to three observables: energy, zenith angle, and event topology. Assuming the astrophysical neutrino flux to be isotropic and to consist of equal flavors at Earth, the all-flavor spectrum with neutrino energies between 25 TeV and 2.8 PeV is well described by an unbroken power law with best-fit spectral index -2.50 ± 0.09 and a flux at 100 TeV of (6.7-1.2+1.1) × 10-18 GeV-1 s-1cm-2. Under the same assumptions, an unbroken power law with index -2 is disfavored with a significance of 3.8σ (p = 0.0066%) with respect to the best fit. This significance is reduced to 2.1σ (p = 1.7%) if instead we compare the best fit to a spectrum with index .2 that has an exponential cut-off at high energies. Allowing the electron-neutrino flux to deviate from the other two flavors, we find a νe fraction of 0.18 ± 0.11 at Earth. The sole production of electron neutrinos, which would be characteristic of neutron-decay-dominated sources, is rejected with a significance of 3.6σ (p = 0.014%).
Published: 2015

29. SEARCHES FOR TIME-DEPENDENT NEUTRINO SOURCES WITH ICECUBE DATA FROM 2008 TO 2012

Author: Aartsen, MG, Ackermann, M, Adams, J, Aguilar, JA, Ahlers, M, Ahrens, M, Altmann, D, Anderson, T, Archinger, M, Arguelles, C, Arlen, TC, Auffenberg, J, Bai, X, Barwick, SW, Baum, V, Bay, R, Baker, M, Beatty, JJ, Tjus, J Becker, Becker, K-H, BenZvi, S, Berghaus, P, Berley, D, Bernardini, E, Bernhard, A, Besson, DZ, Binder, G, Bindig, D, Bissok, M, Blaufuss, E, Blumenthal, J, Boersma, DJ, Bohm, C, Bos, F, Bose, D, Böser, S, Botner, O, Brayeur, L, Bretz, H-P, Brown, AM, Buzinsky, N, Casey, J, Casier, M, Cheung, E, Chirkin, D, Christov, A, Christy, B, Clark, K, Classen, L, Clevermann, F, Coenders, S, Cowen, DF, Silva, AH Cruz, Daughhetee, J, Davis, JC, Day, M, de André, JPAM, De Clercq, C, Dembinski, H, De Ridder, S, Desiati, P, de Vries, KD, de Wasseige, G, de With, M, DeYoung, T, Díaz-Vélez, JC, Dumm, JP, Dunkman, M, Eagan, R, Eberhardt, B, Ehrhardt, T, Eichmann, B, Eisch, J, Euler, S, Evenson, PA, Fadiran, O, Fazely, AR, Fedynitch, A, Feintzeig, J, Felde, J, Filimonov, K, Finley, C, Fischer-Wasels, T, Flis, S, Frantzen, K, Fuchs, T, Gaisser, TK, Gaior, R, Gallagher, J, Gerhardt, L, Gier, D, Gladstone, L, Glüsenkamp, T, Goldschmidt, A, Golup, G, Gonzalez, JG, Goodman, JA, Góra, D, Grant, D, and Gretskov, P
Subjects: Nuclear and Plasma Physics, Particle and High Energy Physics, Astronomical Sciences, Physical Sciences, astroparticle physics, binaries: general, BL Lacertae objects: general, galaxies: active, neutrinos, X-rays: binaries, astro-ph.HE, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Physical Chemistry (incl. Structural), Astronomy & Astrophysics, Astronomical sciences, Particle and high energy physics, Space sciences
Abstract: In this paper searches for flaring astrophysical neutrino sources and sources with periodic emission with the IceCube neutrino telescope are presented. In contrast to time-integrated searches, where steady emission is assumed, the analyses presented here look for a time-dependent signal of neutrinos using the information from the neutrino arrival times to enhance the discovery potential. A search was performed for correlations between neutrino arrival times and directions, as well as neutrino emission following time-dependent light curves, sporadic emission, or periodicities of candidate sources. These include active galactic nuclei, soft γ-ray repeaters, supernova remnants hosting pulsars, microquasars, and X-ray binaries. The work presented here updates and extends previously published results to a longer period that covers 4 years of data from 2008 April 5 to 2012 May 16, including the first year of operation of the completed 86 string detector. The analyses did not find any significant time-dependent point sources of neutrinos, and the results were used to set upper limits on the neutrino flux from source candidates.
Published: 2015

30. Searches for small-scale anisotropies from neutrino point sources with three years of IceCube data

Author: Aartsen, MG, Ackermann, M, Adams, J, Aguilar, JA, Ahlers, M, Ahrens, M, Altmann, D, Anderson, T, Arguelles, C, Arlen, TC, Auffenberg, J, Bai, X, Barwick, SW, Baum, V, Beatty, JJ, Tjus, J Becker, Becker, K-H, BenZvi, S, Berghaus, P, Berley, D, Bernardini, E, Bernhard, A, Besson, DZ, Binder, G, Bindig, D, Bissok, M, Blaufuss, E, Blumenthal, J, Boersma, DJ, Bohm, C, Bos, F, Bose, D, Böser, S, Botner, O, Brayeur, L, Bretz, H-P, Brown, AM, Casey, J, Casier, M, Cheung, E, Chirkin, D, Christov, A, Christy, B, Clark, K, Classen, L, Clevermann, F, Coenders, S, Cowen, DF, Silva, AH Cruz, Danninger, M, Daughhetee, J, Davis, JC, Day, M, de André, JPAM, De Clercq, C, De Ridder, S, Desiati, P, de Vries, KD, de With, M, DeYoung, T, Díaz-Vélez, JC, Dunkman, M, Eagan, R, Eberhardt, B, Eichmann, B, Eisch, J, Euler, S, Evenson, PA, Fadiran, O, Fazely, AR, Fedynitch, A, Feintzeig, J, Felde, J, Feusels, T, Filimonov, K, Finley, C, Fischer-Wasels, T, Flis, S, Franckowiak, A, Frantzen, K, Fuchs, T, Gaisser, TK, Gaior, R, Gallagher, J, Gerhardt, L, Gier, D, Gladstone, L, Glüsenkamp, T, Goldschmidt, A, Golup, G, Gonzalez, JG, Goodman, JA, Góra, D, Grant, D, Gretskov, P, Groh, JC, Groß, A, Ha, C, Haack, C, and Ismail, A Haj
Subjects: Nuclear and Plasma Physics, Particle and High Energy Physics, Physical Sciences, Extraterrestrial neutrinos, Astrophysical neutrinos, Point sources, IceCube, 2pt-correlation, Multipole analysis, astro-ph.HE, 85-05, J.2, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Nuclear & Particles Physics, Astronomical sciences, Particle and high energy physics
Abstract: Recently, IceCube found evidence for a diffuse signal of astrophysical neutrinos in an energy range of ∼60TeV to the PeV-scale [1]. The origin of those events, being a key to understanding the origin of cosmic rays, is still an unsolved question. So far, analyses have not succeeded to resolve the diffuse signal into point-like sources. Searches including a maximum-likelihood-ratio test, based on the reconstructed directions and energies of the detected down- and up-going neutrino candidates, were also performed on IceCube data leading to the exclusion of bright point sources. In this paper, we present two methods to search for faint neutrino point sources in three years of IceCube data, taken between 2008 and 2011. The first method is an autocorrelation test, applied separately to the northern and southern sky. The second method is a multipole analysis, which expands the measured data in the northern hemisphere into spherical harmonics and uses the resulting expansion coefficients to separate signal from background. With both methods, the results are consistent with the background expectation with a slightly more sparse spatial distribution, corresponding to an underfluctuation. Depending on the assumed number of sources, the resulting upper limit on the flux per source in the northern hemisphere for an E-2 energy spectrum ranges from ∼1.5·10-8 GeV/cm2 s−1, in the case of one assumed source, to ∼4·10-10 GeV/cm2 s−1, in the case of 3500 assumed sources.
Published: 2015

31. Development of a general analysis and unfolding scheme and its application to measure the energy spectrum of atmospheric neutrinos with IceCube

Author: Aartsen, MG, Ackermann, M, Adams, J, Aguilar, JA, Ahlers, M, Ahrens, M, Altmann, D, Anderson, T, Arguelles, C, Arlen, TC, Auffenberg, J, Bai, X, Barwick, SW, Baum, V, Beatty, JJ, Tjus, J Becker, Becker, K-H, BenZvi, S, Berghaus, P, Berley, D, Bernardini, E, Bernhard, A, Besson, DZ, Binder, G, Bindig, D, Bissok, M, Blaufuss, E, Blumenthal, J, Boersma, DJ, Bohm, C, Bos, F, Bose, D, Böser, S, Botner, O, Brayeur, L, Bretz, HP, Brown, AM, Casey, J, Casier, M, Cheung, E, Chirkin, D, Christov, A, Christy, B, Clark, K, Classen, L, Clevermann, F, Coenders, S, Cowen, DF, Cruz Silva, AH, Danninger, M, Daughhetee, J, Davis, JC, Day, M, de André, JPAM, De Clercq, C, De Ridder, S, Desiati, P, de Vries, KD, de With, M, DeYoung, T, Díaz-Vélez, JC, Dunkman, M, Eagan, R, Eberhardt, B, Eichmann, B, Eisch, J, Euler, S, Evenson, PA, Fadiran, O, Fazely, AR, Fedynitch, A, Feintzeig, J, Felde, J, Feusels, T, Filimonov, K, Finley, C, Fischer-Wasels, T, Flis, S, Franckowiak, A, Frantzen, K, Fuchs, T, Gaisser, TK, Gaior, R, Gallagher, J, Gerhardt, L, Gier, D, Gladstone, L, Glüsenkamp, T, Goldschmidt, A, Golup, G, Gonzalez, JG, Goodman, JA, Góra, D, Grant, D, Gretskov, P, Groh, JC, Groß, A, Ha, C, Haack, C, and Haj Ismail, A
Subjects: Nuclear and Plasma Physics, Particle and High Energy Physics, Physical Sciences, astro-ph.HE, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics, Astronomical sciences, Atomic, molecular and optical physics, Particle and high energy physics
Abstract: We present the development and application of a generic analysis scheme for the measurement of neutrino spectra with the IceCube detector. This scheme is based on regularized unfolding, preceded by an event selection which uses a Minimum Redundancy Maximum Relevance algorithm to select the relevant variables and a random forest for the classification of events. The analysis has been developed using IceCube data from the 59-string configuration of the detector. 27,771 neutrino candidates were detected in 346 days of livetime. A rejection of 99.9999 % of the atmospheric muon background is achieved. The energy spectrum of the atmospheric neutrino flux is obtained using the TRUEE unfolding program. The unfolded spectrum of atmospheric muon neutrinos covers an energy range from 100 GeV to 1 PeV. Compared to the previous measurement using the detector in the 40-string configuration, the analysis presented here, extends the upper end of the atmospheric neutrino spectrum by more than a factor of two, reaching an energy region that has not been previously accessed by spectral measurements.
Published: 2015

32. Multipole analysis of IceCube data to search for dark matter accumulated in the Galactic halo: IceCube Collaboration

Author: Aartsen, MG, Ackermann, M, Adams, J, Aguilar, JA, Ahlers, M, Ahrens, M, Altmann, D, Anderson, T, Arguelles, C, Arlen, TC, Auffenberg, J, Bai, X, Barwick, SW, Baum, V, Beatty, JJ, Becker Tjus, J, Becker, KH, BenZvi, S, Berghaus, P, Berley, D, Bernardini, E, Bernhard, A, Besson, DZ, Binder, G, Bindig, D, Bissok, M, Blaufuss, E, Blumenthal, J, Boersma, DJ, Bohm, C, Bos, F, Bose, D, Böser, S, Botner, O, Brayeur, L, Bretz, HP, Brown, AM, Casey, J, Casier, M, Chirkin, D, Christov, A, Christy, B, Clark, K, Classen, L, Clevermann, F, Coenders, S, Cowen, DF, Cruz Silva, AH, Danninger, M, Daughhetee, J, Davis, JC, Day, M, de André, JPAM, De Clercq, C, De Ridder, S, Desiati, P, de Vries, KD, de With, M, DeYoung, T, Díaz-Vélez, JC, Dunkman, M, Eagan, R, Eberhardt, B, Eichmann, B, Eisch, J, Euler, S, Evenson, PA, Fadiran, O, Fazely, AR, Fedynitch, A, Feintzeig, J, Felde, J, Feusels, T, Filimonov, K, Finley, C, Fischer-Wasels, T, Flis, S, Franckowiak, A, Frantzen, K, Fuchs, T, Gaisser, TK, Gallagher, J, Gerhardt, L, Gier, D, Gladstone, L, Glüsenkamp, T, Goldschmidt, A, Golup, G, Gonzalez, JG, Goodman, JA, Góra, D, Grandmont, DT, Grant, D, Gretskov, P, Groh, JC, Groß, A, Ha, C, Haack, C, Haj Ismail, A, and Hallen, P
Subjects: astro-ph.HE, astro-ph.GA, Nuclear & Particles Physics, Quantum Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics
Abstract: Dark matter which is bound in the Galactic halo might self-annihilate and produce a flux of stable final state particles, e.g. high energy neutrinos. These neutrinos can be detected with IceCube, a cubic-kilometer sized Cherenkov detector. Given IceCube’s large field of view, a characteristic anisotropy of the additional neutrino flux is expected. In this paper we describe a multipole method to search for such a large-scale anisotropy in IceCube data. This method uses the expansion coefficients of a multipole expansion of neutrino arrival directions and incorporates signal-specific weights for each expansion coefficient. We apply the technique to a high-purity muon neutrino sample from the Northern Hemisphere. The final result is compatible with the null-hypothesis. As no signal was observed, we present limits on the self-annihilation cross-section averaged over the relative velocity distribution (Formula Presented.) down to ([Formula Presented.) for a dark matter particle mass of 700–1,000 GeV and direct annihilation into (Formula Presented.). The resulting exclusion limits come close to exclusion limits from γ-ray experiments, that focus on the outer Galactic halo, for high dark matter masses of a few TeV and hard annihilation channels.
Published: 2015

33. SEARCHES FOR EXTENDED AND POINT-LIKE NEUTRINO SOURCES WITH FOUR YEARS OF ICECUBE DATA

Author: Aartsen, MG, Ackermann, M, Adams, J, Aguilar, JA, Ahlers, M, Ahrens, M, Altmann, D, Anderson, T, Arguelles, C, Arlen, TC, Auffenberg, J, Bai, X, Barwick, SW, Baum, V, Beatty, JJ, Tjus, J Becker, Becker, K-H, BenZvi, S, Berghaus, P, Berley, D, Bernardini, E, Bernhard, A, Besson, DZ, Binder, G, Bindig, D, Bissok, M, Blaufuss, E, Blumenthal, J, Boersma, DJ, Bohm, C, Bos, F, Bose, D, Böser, S, Botner, O, Brayeur, L, Bretz, H-P, Brown, AM, Casey, J, Casier, M, Cheung, E, Chirkin, D, Christov, A, Christy, B, Clark, K, Classen, L, Clevermann, F, Coenders, S, Cowen, DF, Silva, AH Cruz, Danninger, M, Daughhetee, J, Davis, JC, Day, M, de André, JPAM, De Clercq, C, De Ridder, S, Desiati, P, de Vries, KD, de With, M, DeYoung, T, Díaz-Vélez, JC, Dunkman, M, Eagan, R, Eberhardt, B, Eichmann, B, Eisch, J, Euler, S, Evenson, PA, Fadiran, O, Fazely, AR, Fedynitch, A, Feintzeig, J, Felde, J, Feusels, T, Filimonov, K, Finley, C, Fischer-Wasels, T, Flis, S, Franckowiak, A, Frantzen, K, Fuchs, T, Gaisser, TK, Gallagher, J, Gerhardt, L, Gier, D, Gladstone, L, Glüsenkamp, T, Goldschmidt, A, Golup, G, Gonzalez, JG, Goodman, JA, Góra, D, Grandmont, DT, Grant, D, Gretskov, P, Groh, JC, Groß, A, Ha, C, Haack, C, and Ismail, A Haj
Subjects: Nuclear and Plasma Physics, Particle and High Energy Physics, Physical Sciences, astroparticle physics, galaxies: active, galaxies: clusters: general, galaxies: starburst, ISM: supernova remnants, neutrinos, astro-ph.HE, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Physical Chemistry (incl. Structural), Astronomy & Astrophysics, Astronomical sciences, Particle and high energy physics, Space sciences
Abstract: We present results on searches for point-like sources of neutrinos using four years of IceCube data, including the first year of data from the completed 86 string detector. The total livetime of the combined data set is 1373 days. For an E -2 spectrum, the observed 90% C.L. flux upper limits are 10-12 TeV-1 cm-2 s-1 for energies between 1 TeV and 1 PeV in the northern sky and 10-11 TeV-1 cm-2 s-1 for energies between 100 TeV and 100 PeV in the southern sky. This represents a 40% improvement compared to previous publications, resulting from both the additional year of data and the introduction of improved reconstructions. In addition, we present the first results from an all-sky search for extended sources of neutrinos. We update the results of searches for neutrino emission from stacked catalogs of sources and test five new catalogs; two of Galactic supernova remnants and three of active galactic nuclei. In all cases, the data are compatible with the background-only hypothesis, and upper limits on the flux of muon neutrinos are reported for the sources considered.
Published: 2014

34. Search for time-independent neutrino emission from astrophysical sources with 3 yr of IceCube data

Author: Aartsen, MG, Abbasi, R, Abdou, Y, Ackermann, M, Adams, J, Aguilar, JA, Ahlers, M, Altmann, D, Auffenberg, J, Bai, X, Baker, M, Barwick, SW, Baum, V, Bay, R, Beatty, JJ, Bechet, S, Tjus, JB, Becker, KH, Benabderrahmane, ML, Benzvi, S, Berghaus, P, Berley, D, Bernardini, E, Bernhard, A, Besson, DZ, Binder, G, Bindig, D, Bissok, M, Blaufuss, E, Blumenthal, J, Boersma, DJ, Bohaichuk, S, Bohm, C, Bose, D, Böser, S, Botner, O, Brayeur, L, Bretz, HP, Brown, AM, Bruijn, R, Brunner, J, Carson, M, Casey, J, Casier, M, Chirkin, D, Christov, A, Christy, B, Clark, K, Clevermann, F, Coenders, S, Cohen, S, Cowen, DF, Silva, AHC, Danninger, M, Daughhetee, J, Davis, JC, Day, M, De Clercq, C, De Ridder, S, Desiati, P, De Vries, KD, De With, M, Deyoung, T, Díaz-Vélez, JC, Dunkman, M, Eagan, R, Eberhardt, B, Eisch, J, Euler, S, Evenson, PA, Fadiran, O, Fazely, AR, Fedynitch, A, Feintzeig, J, Feusels, T, Filimonov, K, Finley, C, Fischer-Wasels, T, Flis, S, Franckowiak, A, Frantzen, K, Fuchs, T, Gaisser, TK, Gallagher, J, Gerhardt, L, Gladstone, L, Glüsenkamp, T, Goldschmidt, A, Golup, G, Gonzalez, JG, Goodman, JA, Góra, D, Grandmont, DT, Grant, D, Groß, A, Ha, C, Ismail, AH, Hallen, P, Hallgren, A, and Halzen, F
Subjects: astroparticle physics, cosmic rays, neutrinos, telescopes, astro-ph.HE, Astronomy & Astrophysics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Physical Chemistry (incl. Structural)
Abstract: We present the results of a search for neutrino point sources using the IceCube data collected between 2008 April and 2011 May with three partially completed configurations of the detector: the 40-, 59-, and 79-string configurations. The live-time of this data set is 1040 days. An unbinned maximum likelihood ratio test was used to search for an excess of neutrinos above the atmospheric background at any given direction in the sky. By adding two more years of data with improved event selection and reconstruction techniques, the sensitivity was improved by a factor of 3.5 or more with respect to the previously published results obtained with the 40-string configuration of IceCube. We performed an all-sky survey and a dedicated search using a catalog of a priori selected objects observed by other telescopes. In both searches, the data are compatible with the background-only hypothesis. In the absence of evidence for a signal, we set upper limits on the flux of muon neutrinos. For an E -2 neutrino spectrum, the observed limits are (0.9-5) × 10-12 TeV-1 cm-2 s-1 for energies between 1 TeV and 1 PeV in the northern sky and (0.9-23.2) × 10 -12 TeV-1 cm-2 s-1 for energies between 102 TeV and 102 PeV in the southern sky. We also report upper limits for neutrino emission from groups of sources that were selected according to theoretical models or observational parameters and analyzed with a stacking approach. Some of the limits presented already reach the level necessary to quantitatively test current models of neutrino emission. © 2013. The American Astronomical Society. All rights reserved.
Published: 2013

35. Probing the origin of cosmic rays with extremely high energy neutrinos using the IceCube Observatory

Author: Aartsen, MG, Abbasi, R, Ackermann, M, Adams, J, Aguilar, JA, Ahlers, M, Altmann, D, Arguelles, C, Auffenberg, J, Bai, X, Baker, M, Barwick, SW, Baum, V, Bay, R, Beatty, JJ, Becker Tjus, J, Becker, KH, Benzvi, S, Berghaus, P, Berley, D, Bernardini, E, Bernhard, A, Besson, DZ, Binder, G, Bindig, D, Bissok, M, Blaufuss, E, Blumenthal, J, Boersma, DJ, Bohm, C, Bose, D, Böser, S, Botner, O, Brayeur, L, Bretz, HP, Brown, AM, Bruijn, R, Casey, J, Casier, M, Chirkin, D, Christov, A, Christy, B, Clark, K, Clevermann, F, Coenders, S, Cohen, S, Cowen, DF, Cruz Silva, AH, Danninger, M, Daughhetee, J, Davis, JC, Day, M, De Clercq, C, De Ridder, S, Desiati, P, De Vries, KD, De With, M, Deyoung, T, Díaz-Vélez, JC, Dunkman, M, Eagan, R, Eberhardt, B, Eisch, J, Euler, S, Evenson, PA, Fadiran, O, Fazely, AR, Fedynitch, A, Feintzeig, J, Feusels, T, Filimonov, K, Finley, C, Fischer-Wasels, T, Flis, S, Franckowiak, A, Frantzen, K, Fuchs, T, Gaisser, TK, Gallagher, J, Gerhardt, L, Gladstone, L, Glüsenkamp, T, Goldschmidt, A, Golup, G, Gonzalez, JG, Goodman, JA, Góra, D, Grandmont, DT, Grant, D, Gretskov, P, Groh, JC, Groß, A, Ha, C, Haj Ismail, A, Hallen, P, Hallgren, A, Halzen, F, Hanson, K, Heereman, D, and Heinen, D
Subjects: astro-ph.HE, astro-ph.CO, hep-ex, Nuclear & Particles Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics
Abstract: We have searched for extremely high energy neutrinos using data taken with the IceCube detector between May 2010 and May 2012. Two neutrino-induced particle shower events with energies around 1 PeV were observed, as reported previously. In this work, we investigate whether these events could originate from cosmogenic neutrinos produced in the interactions of ultrahigh energy cosmic rays with ambient photons while propagating through intergalactic space. Exploiting IceCube's large exposure for extremely high energy neutrinos and the lack of observed events above 100 PeV, we can rule out the corresponding models at more than 90% confidence level. The model-independent quasidifferential 90% C.L. upper limit, which amounts to E2e+ν+ν=1.2×10-7 GeV cm-2 s-1 sr-1 at 1 EeV, provides the most stringent constraint in the energy range from 10 PeV to 10 EeV. Our observation disfavors strong cosmological evolution of the highest energy cosmic-ray sources such as the Fanaroff-Riley type II class of radio galaxies. © 2013 American Physical Society.
Published: 2013

36. Search for relativistic magnetic monopoles with the AMANDA-II neutrino telescope

Author: The IceCube Collaboration, Abbasi, R, Abdou, Y, Abu-Zayyad, T, Adams, J, Aguilar, JA, Ahlers, M, Andeen, K, Auffenberg, J, Bai, X, Baker, M, Barwick, SW, Bay, R, Bazo Alba, JL, Beattie, K, Beatty, JJ, Bechet, S, Becker, JK, Becker, K-H, Benabderrahmane, ML, BenZvi, S, Berdermann, J, Berghaus, P, Berley, D, Bernardini, E, Bertrand, D, Besson, DZ, Bissok, M, Blaufuss, E, Boersma, DJ, Bohm, C, Böser, S, Botner, O, Bradley, L, Braun, J, Buitink, S, Carson, M, Chirkin, D, Christy, B, Clem, J, Clevermann, F, Cohen, S, Colnard, C, Cowen, DF, D’Agostino, MV, Danninger, M, Davis, JC, De Clercq, C, Demirörs, L, Depaepe, O, Descamps, F, Desiati, P, de Vries-Uiterweerd, G, DeYoung, T, Díaz-Vélez, JC, Dierckxsens, M, Dreyer, J, Dumm, JP, Duvoort, MR, Ehrlich, R, Eisch, J, Ellsworth, RW, Engdegård, O, Euler, S, Evenson, PA, Fadiran, O, Fazely, AR, Feusels, T, Filimonov, K, Finley, C, Foerster, MM, Fox, BD, Franckowiak, A, Franke, R, Gaisser, TK, Gallagher, J, Geisler, M, Gerhardt, L, Gladstone, L, Glüsenkamp, T, Goldschmidt, A, Goodman, JA, Grant, D, Griesel, T, Groß, A, Grullon, S, Gurtner, M, Ha, C, Hallgren, A, Halzen, F, Han, K, Hanson, K, Helbing, K, Herquet, P, Hickford, S, Hill, GC, Hoffman, KD, Homeier, A, Hoshina, K, and Hubert, D
Subjects: Nuclear and Plasma Physics, Particle and High Energy Physics, Astronomical Sciences, Physical Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics, Astronomical sciences, Atomic, molecular and optical physics, Particle and high energy physics
Abstract: We present the search for Cherenkov signatures from relativistic magnetic monopoles in data taken with the AMANDA-II detector, a neutrino telescope deployed in the Antarctic ice cap at the Geographic South Pole. The non-observation of a monopole signal in data collected during the year 2000 improves present experimental limits on the flux of relativistic magnetic monopoles: Our flux limit varies between 3.8 × 10-17 cm-2 s-1 sr-1 (for monopoles moving at the vacuum speed of light) and 8.8 × 10-16 cm-2 s-1 sr-1 (for monopoles moving at a speed β=v/c=0.76, just above the Cherenkov threshold in ice). These limits apply to monopoles that are energetic enough to penetrate the Earth and enter the detector from below the horizon. The limit obtained for monopoles reaching the detector from above the horizon is less stringent by roughly an order of magnitude, due to the much larger background from down-going atmospheric muons. This looser limit is however valid for a larger class of magnetic monopoles, since the monopoles are not required to pass through the Earth. © 2010 The Author(s).
Published: 2010

37. Search for relativistic magnetic monopoles with the AMANDA-II neutrino telescope: The IceCube Collaboration

Author: Abbasi, R, Abdou, Y, Abu-Zayyad, T, Adams, J, Aguilar, JA, Ahlers, M, Andeen, K, Auffenberg, J, Bai, X, Baker, M, Barwick, SW, Bay, R, Bazo Alba, JL, Beattie, K, Beatty, JJ, Bechet, S, Becker, JK, Becker, KH, Benabderrahmane, ML, BenZvi, S, Berdermann, J, Berghaus, P, Berley, D, Bernardini, E, Bertrand, D, Besson, DZ, Bissok, M, Blaufuss, E, Boersma, DJ, Bohm, C, Böser, S, Botner, O, Bradley, L, Braun, J, Buitink, S, Carson, M, Chirkin, D, Christy, B, Clem, J, Clevermann, F, Cohen, S, Colnard, C, Cowen, DF, D'Agostino, MV, Danninger, M, Davis, JC, de Clercq, C, Demirörs, L, Depaepe, O, Descamps, F, Desiati, P, de Vries-Uiterweerd, G, DeYoung, T, Díaz-Vélez, JC, Dierckxsens, M, Dreyer, J, Dumm, JP, Duvoort, MR, Ehrlich, R, Eisch, J, Ellsworth, RW, Engdegård, O, Euler, S, Evenson, PA, Fadiran, O, Fazely, AR, Feusels, T, Filimonov, K, Finley, C, Foerster, MM, Fox, BD, Franckowiak, A, Franke, R, Gaisser, TK, Gallagher, J, Geisler, M, Gerhardt, L, Gladstone, L, Glüsenkamp, T, Goldschmidt, A, Goodman, JA, Grant, D, Griesel, T, Groß, A, Grullon, S, Gurtner, M, Ha, C, Hallgren, A, Halzen, F, Han, K, Hanson, K, Helbing, K, Herquet, P, Hickford, S, Hill, GC, Hoffman, KD, Homeier, A, Hoshina, K, Hubert, D, and Huelsnitz, W
Subjects: Nuclear & Particles Physics, Quantum Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics
Abstract: We present the search for Cherenkov signatures from relativistic magnetic monopoles in data taken with the AMANDA-II detector, a neutrino telescope deployed in the Antarctic ice cap at the Geographic South Pole. The non-observation of a monopole signal in data collected during the year 2000 improves present experimental limits on the flux of relativistic magnetic monopoles: Our flux limit varies between 3.8 × 10-17 cm-2 s-1 sr-1 (for monopoles moving at the vacuum speed of light) and 8.8 × 10-16 cm-2 s-1 sr-1 (for monopoles moving at a speed β=v/c=0.76, just above the Cherenkov threshold in ice). These limits apply to monopoles that are energetic enough to penetrate the Earth and enter the detector from below the horizon. The limit obtained for monopoles reaching the detector from above the horizon is less stringent by roughly an order of magnitude, due to the much larger background from down-going atmospheric muons. This looser limit is however valid for a larger class of magnetic monopoles, since the monopoles are not required to pass through the Earth. © 2010 The Author(s).
Published: 2010

38. Erratum to: Search for annihilating dark matter in the Sun with 3 years of IceCube data

Author: Aartsen, MG, Ackermann, M, Adams, J, Aguilar, JA, Ahlers, M, Ahrens, M, Altmann, D, Andeen, K, Anderson, T, Ansseau, I, Anton, G, Archinger, M, Argüelles, C, Auffenberg, J, Axani, S, Bai, X, Barwick, SW, Baum, V, Bay, R, Beatty, JJ, Becker Tjus, J, Becker, K-H, BenZvi, S, Berley, D, Bernardini, E, Bernhard, A, Besson, DZ, Binder, G, Bindig, D, Bissok, M, Blaufuss, E, Blot, S, Bohm, C, Börner, M, Bos, F, Bose, D, Böser, S, Botner, O, Braun, J, Brayeur, L, Bretz, H-P, Bron, S, Burgman, A, Carver, T, Casier, M, Cheung, E, Chirkin, D, Christov, A, Clark, K, Classen, L, Coenders, S, Collin, GH, Conrad, JM, Cowen, DF, Cross, R, Day, M, de André, JPAM, De Clercq, C, del Pino Rosendo, E, Dembinski, H, De Ridder, S, Desiati, P, de Vries, KD, de Wasseige, G, de With, M, DeYoung, T, Díaz-Vélez, JC, di Lorenzo, V, Dujmovic, H, Dumm, JP, Dunkman, M, Eberhardt, B, Ehrhardt, T, Eichmann, B, Eller, P, Euler, S, Evenson, PA, Fahey, S, Fazely, AR, Feintzeig, J, Felde, J, Filimonov, K, Finley, C, Flis, S, Fösig, C-C, Franckowiak, A, Friedman, E, Fuchs, T, Gaisser, TK, Gallagher, J, Gerhardt, L, Ghorbani, K, Giang, W, Gladstone, L, Glauch, T, Glüsenkamp, T, Goldschmidt, A, Gonzalez, JG, Grant, D, and Griffith, Z
Subjects: Quantum Physics, Particle and Plasma Physics, Physics::Instrumentation and Detectors, Molecular, High Energy Physics::Experiment, Nuclear, Atomic, Nuclear & Particles Physics, Computer Science::Databases
Abstract: In the analysis published in 1, constraints on the number of signal events can be interpreted as constraints on the volumetric neutrino to muon conversion rate.
Published: 2019

39. Erratum to: Search for non-relativistic magnetic monopoles with IceCube (The European Physical Journal C, (2014), 74, 7, (2938), 10.1140/epjc/s10052-014-2938-8)

Author: Aartsen, MG, Abbasi, R, Ackermann, M, Adams, J, Aguilar, JA, Ahlers, M, Altmann, D, Arguelles, C, Arlen, TC, Auffenberg, J, Bai, X, Baker, M, Barwick, SW, Baum, V, Bay, R, Beatty, JJ, Tjus, JB, Becker, KH, Benabderrahmane, ML, BenZvi, S, Berghaus, P, Berley, D, Bernardini, E, Bernhard, A, Besson, DZ, Binder, G, Bindig, D, Bissok, M, Blaufuss, E, Blumenthal, J, Boersma, DJ, Bohm, C, Bose, D, Böser, S, Botner, O, Brayeur, L, Bretz, HP, Brown, AM, Bruijn, R, Casey, J, Casier, M, Chirkin, D, Christov, A, Christy, B, Clark, K, Classen, L, Clevermann, F, Coenders, S, Cohen, S, Cowen, DF, Silva, AHC, Danninger, M, Daughhetee, J, Davis, JC, Day, M, de André, JPAM, De Clercq, C, De Ridder, S, Desiati, P, de Vries, KD, de With, M, DeYoung, T, Díaz-Vélez, JC, Dunkman, M, Eagan, R, Eberhardt, B, Eichmann, B, Eisch, J, Euler, S, Evenson, PA, Fadiran, O, Fazely, AR, Fedynitch, A, Feintzeig, J, Feusels, T, Filimonov, K, Finley, C, Fischer-Wasels, T, Flis, S, Franckowiak, A, Frantzen, K, Fuchs, T, Gaisser, TK, Gallagher, J, Gerhardt, L, Gladstone, L, Glüsenkamp, T, Goldschmidt, A, Golup, G, Gonzalez, JG, Goodman, JA, Góra, D, Grandmont, DT, Grant, D, Gretskov, P, Groh, JC, Groß, A, Ha, C, Haack, C, and Ismail, AH
Subjects: Quantum Physics, Particle and Plasma Physics, Nuclear Theory, Molecular, Nuclear, Nuclear & Particles Physics, Atomic
Abstract: In the analyses, published in Ref. [1], the exclusion limits are calculated in dependence of the mean free path of the magnetic monopole - nucleon catalysis interaction.
Published: 2019

40. Search for annihilating dark matter in the Sun with 3 years of IceCube data: IceCube Collaboration

Author: Aartsen, MG, Ackermann, M, Adams, J, Aguilar, JA, Ahlers, M, Ahrens, M, Altmann, D, Andeen, K, Anderson, T, Ansseau, I, Anton, G, Archinger, M, Argüelles, C, Auffenberg, J, Axani, S, Bai, X, Barwick, SW, Baum, V, Bay, R, Beatty, JJ, BeckerTjus, J, Becker, KH, BenZvi, S, Berley, D, Bernardini, E, Bernhard, A, Besson, DZ, Binder, G, Bindig, D, Bissok, M, Blaufuss, E, Blot, S, Bohm, C, Börner, M, Bos, F, Bose, D, Böser, S, Botner, O, Braun, J, Brayeur, L, Bretz, HP, Bron, S, Burgman, A, Carver, T, Casier, M, Cheung, E, Chirkin, D, Christov, A, Clark, K, Classen, L, Coenders, S, Collin, GH, Conrad, JM, Cowen, DF, Cross, R, Day, M, de André, JPAM, De Clercq, C, delPinoRosendo, E, Dembinski, H, De Ridder, S, Desiati, P, de Vries, KD, de Wasseige, G, de With, M, DeYoung, T, Díaz-Vélez, JC, di Lorenzo, V, Dujmovic, H, Dumm, JP, Dunkman, M, Eberhardt, B, Ehrhardt, T, Eichmann, B, Eller, P, Euler, S, Evenson, PA, Fahey, S, Fazely, AR, Feintzeig, J, Felde, J, Filimonov, K, Finley, C, Flis, S, Fösig, CC, Franckowiak, A, Friedman, E, Fuchs, T, Gaisser, TK, Gallagher, J, Gerhardt, L, Ghorbani, K, Giang, W, Gladstone, L, Glauch, T, Glüsenkamp, T, Goldschmidt, A, Gonzalez, JG, Grant, D, and Griffith, Z
Subjects: astro-ph.HE, Quantum Physics, Particle and Plasma Physics, hep-ex, Astrophysics::High Energy Astrophysical Phenomena, Molecular, High Energy Physics::Experiment, Nuclear, Nuclear & Particles Physics, Atomic
Abstract: We present results from an analysis looking for dark matter annihilation in the Sun with the IceCube neutrino telescope. Gravitationally trapped dark matter in the Sun’s core can annihilate into Standard Model particles making the Sun a source of GeV neutrinos. IceCube is able to detect neutrinos with energies >100GeV while its low-energy infill array DeepCore extends this to >10GeV. This analysis uses data gathered in the austral winters between May 2011 and May 2014, corresponding to 532 days of livetime when the Sun, being below the horizon, is a source of up-going neutrino events, easiest to discriminate against the dominant background of atmospheric muons. The sensitivity is a factor of two to four better than previous searches due to additional statistics and improved analysis methods involving better background rejection and reconstructions. The resultant upper limits on the spin-dependent dark matter-proton scattering cross section reach down to 1.46 × 10 - 5pb for a dark matter particle of mass 500GeV annihilating exclusively into τ+τ-particles. These are currently the most stringent limits on the spin-dependent dark matter-proton scattering cross section for WIMP masses above 50GeV.
Published: 2017

41. First search for dark matter annihilations in the Earth with the IceCube detector: IceCube Collaboration

Author: Aartsen, MG, Abraham, K, Ackermann, M, Adams, J, Aguilar, JA, Ahlers, M, Ahrens, M, Altmann, D, Andeen, K, Anderson, T, Ansseau, I, Anton, G, Archinger, M, Argüelles, C, Auffenberg, J, Axani, S, Bai, X, Barwick, SW, Baum, V, Bay, R, Beatty, JJ, Becker Tjus, J, Becker, KH, BenZvi, S, Berley, D, Bernardini, E, Bernhard, A, Besson, DZ, Binder, G, Bindig, D, Bissok, M, Blaufuss, E, Blot, S, Bohm, C, Börner, M, Bos, F, Bose, D, Böser, S, Botner, O, Braun, J, Brayeur, L, Bretz, HP, Bron, S, Burgman, A, Carver, T, Casier, M, Cheung, E, Chirkin, D, Christov, A, Clark, K, Classen, L, Coenders, S, Collin, GH, Conrad, JM, Cowen, DF, Cross, R, Day, M, de André, JPAM, De Clercq, C, del Pino Rosendo, E, Dembinski, H, De Ridder, S, Desiati, P, de Vries, KD, de Wasseige, G, de With, M, DeYoung, T, Díaz-Vélez, JC, di Lorenzo, V, Dujmovic, H, Dumm, JP, Dunkman, M, Eberhardt, B, Ehrhardt, T, Eichmann, B, Eller, P, Euler, S, Evenson, PA, Fahey, S, Fazely, AR, Feintzeig, J, Felde, J, Filimonov, K, Finley, C, Flis, S, Fösig, CC, Franckowiak, A, Friedman, E, Fuchs, T, Gaisser, TK, Gallagher, J, Gerhardt, L, Ghorbani, K, Giang, W, Gladstone, L, Glagla, M, Glauch, T, Glüsenkamp, T, Goldschmidt, A, and Golup, G
Subjects: astro-ph.HE, Quantum Physics, Particle and Plasma Physics, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Instrumentation and Methods for Astrophysics, Molecular, High Energy Physics::Experiment, Nuclear, Astrophysics::Cosmology and Extragalactic Astrophysics, Nuclear & Particles Physics, Atomic
Abstract: We present the results of the first IceCube search for dark matter annihilation in the center of the Earth. Weakly interacting massive particles (WIMPs), candidates for dark matter, can scatter off nuclei inside the Earth and fall below its escape velocity. Over time the captured WIMPs will be accumulated and may eventually self-annihilate. Among the annihilation products only neutrinos can escape from the center of the Earth. Large-scale neutrino telescopes, such as the cubic kilometer IceCube Neutrino Observatory located at the South Pole, can be used to search for such neutrino fluxes. Data from 327days of detector livetime during 2011/2012 were analyzed. No excess beyond the expected background from atmospheric neutrinos was detected. The derived upper limits on the annihilation rate of WIMPs in the Earth and the resulting muon flux are an order of magnitude stronger than the limits of the last analysis performed with data from IceCube’s predecessor AMANDA. The limits can be translated in terms of a spin-independent WIMP–nucleon cross section. For a WIMP mass of 50GeV this analysis results in the most restrictive limits achieved with IceCube data.
Published: 2017

42. Measurement of the νμ energy spectrum with IceCube-79: IceCube Collaboration

Author: Aartsen, MG, Ackermann, M, Adams, J, Aguilar, JA, Ahlers, M, Ahrens, M, Al Samarai, I, Altmann, D, Andeen, K, Anderson, T, Ansseau, I, Anton, G, Archinger, M, Argüelles, C, Auffenberg, J, Axani, S, Bagherpour, H, Bai, X, Barwick, SW, Baum, V, Bay, R, Beatty, JJ, Becker Tjus, J, Becker, K-H, BenZvi, S, Berley, D, Bernardini, E, Besson, DZ, Binder, G, Bindig, D, Blaufuss, E, Blot, S, Bohm, C, Börner, M, Bos, F, Bose, D, Böser, S, Botner, O, Bradascio, F, Braun, J, Brayeur, L, Bretz, H-P, Bron, S, Burgman, A, Carver, T, Casier, M, Cheung, E, Chirkin, D, Christov, A, Clark, K, Classen, L, Coenders, S, Collin, GH, Conrad, JM, Cowen, DF, Cross, R, Day, M, de André, JPAM, De Clercq, C, Del Pino Rosendo, E, Dembinski, H, De Ridder, S, Desiati, P, de Vries, KD, de Wasseige, G, de With, M, DeYoung, T, Díaz-Vélez, JC, di Lorenzo, V, Dujmovic, H, Dumm, JP, Dunkman, M, Eberhardt, B, Ehrhardt, T, Eichmann, B, Eller, P, Euler, S, Evenson, PA, Fahey, S, Fazely, AR, Feintzeig, J, Felde, J, Filimonov, K, Finley, C, Flis, S, Fösig, C-C, Franckowiak, A, Friedman, E, Fuchs, T, Gaisser, TK, Gallagher, J, Gerhardt, L, Ghorbani, K, Giang, W, Gladstone, L, Glauch, T, Glüsenkamp, T, Goldschmidt, A, Gonzalez, JG, and Grant, D
Subjects: astro-ph.HE, Quantum Physics, Particle and Plasma Physics, Astrophysics::High Energy Astrophysical Phenomena, Molecular, High Energy Physics::Experiment, Nuclear, Nuclear & Particles Physics, Atomic
Abstract: IceCube is a neutrino observatory deployed in the glacial ice at the geographic South Pole. The νμ energy unfolding described in this paper is based on data taken with IceCube in its 79-string configuration. A sample of muon neutrino charged-current interactions with a purity of 99.5% was selected by means of a multivariate classification process based on machine learning. The subsequent unfolding was performed using the software Truee. The resulting spectrum covers an E ν -range of more than four orders of magnitude from 125GeV to 3.2PeV. Compared to the Honda atmospheric neutrino flux model, the energy spectrum shows an excess of more than 1.9σ in four adjacent bins for neutrino energies Eν≥177.8TeV . The obtained spectrum is fully compatible with previous measurements of the atmospheric neutrino flux and recent IceCube measurements of a flux of high-energy astrophysical neutrinos.
Published: 2017

43. Search for dark matter annihilation in the Galactic Center with IceCube-79: IceCube Collaboration

Author: Aartsen, MG, Abraham, K, Ackermann, M, Adams, J, Aguilar, JA, Ahlers, M, Ahrens, M, Altmann, D, Anderson, T, Archinger, M, Arguelles, C, Arlen, TC, Auffenberg, J, Bai, X, Barwick, SW, Baum, V, Bay, R, Beatty, JJ, Becker Tjus, J, Becker, KH, Beiser, E, BenZvi, S, Berghaus, P, Berley, D, Bernardini, E, Bernhard, A, Besson, DZ, Binder, G, Bindig, D, Bissok, M, Blaufuss, E, Blumenthal, J, Boersma, DJ, Bohm, C, Börner, M, Bos, F, Bose, D, Böser, S, Botner, O, Braun, J, Brayeur, L, Bretz, HP, Brown, AM, Buzinsky, N, Casey, J, Casier, M, Cheung, E, Chirkin, D, Christov, A, Christy, B, Clark, K, Classen, L, Coenders, S, Cowen, DF, Cruz Silva, AH, Daughhetee, J, Davis, JC, Day, M, de André, JPAM, De Clercq, C, Dembinski, H, De Ridder, S, Desiati, P, de Vries, KD, de Wasseige, G, de With, M, DeYoung, T, Díaz-Vélez, JC, Dumm, JP, Dunkman, M, Eagan, R, Eberhardt, B, Ehrhardt, T, Eichmann, B, Euler, S, Evenson, PA, Fadiran, O, Fahey, S, Fazely, AR, Fedynitch, A, Feintzeig, J, Felde, J, Filimonov, K, Finley, C, Fischer-Wasels, T, Flis, S, Fuchs, T, Glagla, M, Gaisser, TK, Gaior, R, Gallagher, J, Gerhardt, L, Ghorbani, K, Gier, D, Gladstone, L, Glüsenkamp, T, Goldschmidt, A, Golup, G, Gonzalez, JG, and Góra, D
Subjects: astro-ph.HE, Quantum Physics, Particle and Plasma Physics, Astrophysics::High Energy Astrophysical Phenomena, Molecular, Nuclear, Astrophysics::Cosmology and Extragalactic Astrophysics, Nuclear & Particles Physics, Atomic, Astrophysics::Galaxy Astrophysics
Abstract: The Milky Way is expected to be embedded in a halo of dark matter particles, with the highest density in the central region, and decreasing density with the halo-centric radius. Dark matter might be indirectly detectable at Earth through a flux of stable particles generated in dark matter annihilations and peaked in the direction of the Galactic Center. We present a search for an excess flux of muon (anti-) neutrinos from dark matter annihilation in the Galactic Center using the cubic-kilometer-sized IceCube neutrino detector at the South Pole. There, the Galactic Center is always seen above the horizon. Thus, new and dedicated veto techniques against atmospheric muons are required to make the southern hemisphere accessible for IceCube. We used 319.7 live-days of data from IceCube operating in its 79-string configuration during 2010 and 2011. No neutrino excess was found and the final result is compatible with the background. We present upper limits on the self-annihilation cross-section, (Formula presented.), for WIMP masses ranging from 30GeV up to 10TeV, assuming cuspy (NFW) and flat-cored (Burkert) dark matter halo profiles, reaching down to ≃4·10-24cm3s-1, and ≃2.6·10-23cm3s-1 for the νν¯ channel, respectively.
Published: 2015

44. Development of a general analysis and unfolding scheme and its application to measure the energy spectrum of atmospheric neutrinos with IceCube: IceCube Collaboration

Author: Aartsen, MG, Ackermann, M, Adams, J, Aguilar, JA, Ahlers, M, Ahrens, M, Altmann, D, Anderson, T, Arguelles, C, Arlen, TC, Auffenberg, J, Bai, X, Barwick, SW, Baum, V, Beatty, JJ, Tjus, J Becker, Becker, K-H, BenZvi, S, Berghaus, P, Berley, D, Bernardini, E, Bernhard, A, Besson, DZ, Binder, G, Bindig, D, Bissok, M, Blaufuss, E, Blumenthal, J, Boersma, DJ, Bohm, C, Bos, F, Bose, D, Böser, S, Botner, O, Brayeur, L, Bretz, HP, Brown, AM, Casey, J, Casier, M, Cheung, E, Chirkin, D, Christov, A, Christy, B, Clark, K, Classen, L, Clevermann, F, Coenders, S, Cowen, DF, Cruz Silva, AH, Danninger, M, Daughhetee, J, Davis, JC, Day, M, de André, JPAM, De Clercq, C, De Ridder, S, Desiati, P, de Vries, KD, de With, M, DeYoung, T, Díaz-Vélez, JC, Dunkman, M, Eagan, R, Eberhardt, B, Eichmann, B, Eisch, J, Euler, S, Evenson, PA, Fadiran, O, Fazely, AR, Fedynitch, A, Feintzeig, J, Felde, J, Feusels, T, Filimonov, K, Finley, C, Fischer-Wasels, T, Flis, S, Franckowiak, A, Frantzen, K, Fuchs, T, Gaisser, TK, Gaior, R, Gallagher, J, Gerhardt, L, Gier, D, Gladstone, L, Glüsenkamp, T, Goldschmidt, A, Golup, G, Gonzalez, JG, Goodman, JA, Góra, D, Grant, D, Gretskov, P, Groh, JC, Groß, A, Ha, C, Haack, C, and Haj Ismail, A
Subjects: astro-ph.HE, Quantum Physics, Particle and Plasma Physics, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Molecular, High Energy Physics::Experiment, Nuclear, Atomic, Nuclear & Particles Physics
Abstract: We present the development and application of a generic analysis scheme for the measurement of neutrino spectra with the IceCube detector. This scheme is based on regularized unfolding, preceded by an event selection which uses a Minimum Redundancy Maximum Relevance algorithm to select the relevant variables and a random forest for the classification of events. The analysis has been developed using IceCube data from the 59-string configuration of the detector. 27,771 neutrino candidates were detected in 346days of livetime. A rejection of 99.9999% of the atmospheric muon background is achieved. The energy spectrum of the atmospheric neutrino flux is obtained using the TRUEE unfolding program. The unfolded spectrum of atmospheric muon neutrinos covers an energy range from 100GeV to 1PeV. Compared to the previous measurement using the detector in the 40-string configuration, the analysis presented here, extends the upper end of the atmospheric neutrino spectrum by more than a factor of two, reaching an energy region that has not been previously accessed by spectral measurements.
Published: 2015

45. Multipole analysis of IceCube data to search for dark matter accumulated in the Galactic halo

Author: Aartsen, MG, Ackermann, M, Adams, J, Aguilar, JA, Ahlers, M, Ahrens, M, Altmann, D, Anderson, T, Arguelles, C, Arlen, TC, Auffenberg, J, Bai, X, Barwick, SW, Baum, V, Beatty, JJ, Becker Tjus, J, Becker, K-H, BenZvi, S, Berghaus, P, Berley, D, Bernardini, E, Bernhard, A, Besson, DZ, Binder, G, Bindig, D, Bissok, M, Blaufuss, E, Blumenthal, J, Boersma, DJ, Bohm, C, Bos, F, Bose, D, Böser, S, Botner, O, Brayeur, L, Bretz, H-P, Brown, AM, Casey, J, Casier, M, Chirkin, D, Christov, A, Christy, B, Clark, K, Classen, L, Clevermann, F, Coenders, S, Cowen, DF, Cruz Silva, AH, Danninger, M, Daughhetee, J, Davis, JC, Day, M, de André, JPAM, De Clercq, C, De Ridder, S, Desiati, P, de Vries, KD, de With, M, DeYoung, T, Díaz-Vélez, JC, Dunkman, M, Eagan, R, Eberhardt, B, Eichmann, B, Eisch, J, Euler, S, Evenson, PA, Fadiran, O, Fazely, AR, Fedynitch, A, Feintzeig, J, Felde, J, Feusels, T, Filimonov, K, Finley, C, Fischer-Wasels, T, Flis, S, Franckowiak, A, Frantzen, K, Fuchs, T, Gaisser, TK, Gallagher, J, Gerhardt, L, Gier, D, Gladstone, L, Glüsenkamp, T, Goldschmidt, A, Golup, G, Gonzalez, JG, Goodman, JA, Góra, D, Grandmont, DT, Grant, D, Gretskov, P, Groh, JC, Groß, A, Ha, C, Haack, C, Haj Ismail, A, and Hallen, P
Subjects: astro-ph.HE, Quantum Physics, Particle and Plasma Physics, Astrophysics::High Energy Astrophysical Phenomena, astro-ph.GA, Molecular, High Energy Physics::Experiment, Nuclear, Atomic, Nuclear & Particles Physics
Abstract: Dark matter which is bound in the Galactic halo might self-annihilate and produce a flux of stable final state particles, e.g. high energy neutrinos. These neutrinos can be detected with IceCube, a cubic-kilometer sized Cherenkov detector. Given IceCube’s large field of view, a characteristic anisotropy of the additional neutrino flux is expected. In this paper we describe a multipole method to search for such a large-scale anisotropy in IceCube data. This method uses the expansion coefficients of a multipole expansion of neutrino arrival directions and incorporates signal-specific weights for each expansion coefficient. We apply the technique to a high-purity muon neutrino sample from the Northern Hemisphere. The final result is compatible with the null-hypothesis. As no signal was observed, we present limits on the self-annihilation cross-section averaged over the relative velocity distribution (Formula Presented.) down to ([Formula Presented.) for a dark matter particle mass of 700–1,000GeV and direct annihilation into (Formula Presented.). The resulting exclusion limits come close to exclusion limits from γ-ray experiments, that focus on the outer Galactic halo, for high dark matter masses of a few TeV and hard annihilation channels.
Published: 2015

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