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21 results on '"Davis, Jc"'

1. Searches for Sterile Neutrinos 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, 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, 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, Fuchs, T, Gaisser, TK, Gaior, R, Gallagher, J, Gerhardt, L, Ghorbani, K, Giang, W, Gladstone, L, Glüsenkamp, T, Goldschmidt, A, Golup, G, and Gonzalez, JG

Subjects
IceCube Collaboration, Mathematical Sciences, Physical Sciences, Engineering, General Physics
Abstract

The IceCube neutrino telescope at the South Pole has measured the atmospheric muon neutrino spectrum as a function of zenith angle and energy in the approximate 320 GeV to 20 TeV range, to search for the oscillation signatures of light sterile neutrinos. No evidence for anomalous ν_{μ} or ν[over ¯]_{μ} disappearance is observed in either of two independently developed analyses, each using one year of atmospheric neutrino data. New exclusion limits are placed on the parameter space of the 3+1 model, in which muon antineutrinos experience a strong Mikheyev-Smirnov-Wolfenstein-resonant oscillation. The exclusion limits extend to sin^{2}2θ_{24}≤0.02 at Δm^{2}∼0.3  eV^{2} at the 90% confidence level. The allowed region from global analysis of appearance experiments, including LSND and MiniBooNE, is excluded at approximately the 99% confidence level for the global best-fit value of |U_{e4}|^{2}.

Published
2016

2. Evidence for Astrophysical Muon Neutrinos from the Northern Sky 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, 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 Goodman, JA

Subjects
Nuclear and Plasma Physics, Particle and High Energy Physics, Physical Sciences, IceCube Collaboration, astro-ph.HE, Mathematical Sciences, Engineering, General Physics, Mathematical sciences, Physical sciences
Abstract

Results from the IceCube Neutrino Observatory have recently provided compelling evidence for the existence of a high energy astrophysical neutrino flux utilizing a dominantly Southern Hemisphere data set consisting primarily of ν(e) and ν(τ) charged-current and neutral-current (cascade) neutrino interactions. In the analysis presented here, a data sample of approximately 35,000 muon neutrinos from the Northern sky is extracted from data taken during 659.5 days of live time recorded between May 2010 and May 2012. While this sample is composed primarily of neutrinos produced by cosmic ray interactions in Earth's atmosphere, the highest energy events are inconsistent with a hypothesis of solely terrestrial origin at 3.7σ significance. These neutrinos can, however, be explained by an astrophysical flux per neutrino flavor at a level of Φ(E(ν))=9.9(-3.4)(+3.9)×10(-19)  GeV(-1) cm(-2) sr(-1) s(-1)(E(ν)/100  TeV(-2), consistent with IceCube's Southern-Hemisphere-dominated result. Additionally, a fit for an astrophysical flux with an arbitrary spectral index is performed. We find a spectral index of 2.2(-0.2)(+0.2), which is also in good agreement with the Southern Hemisphere result.

Published
2015

3. Flavor Ratio of Astrophysical Neutrinos above 35 TeV in 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, 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, 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, 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 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, Gretskov, P, Groh, JC, Groß, A, and Ha, C

Subjects
Nuclear and Plasma Physics, Particle and High Energy Physics, Physical Sciences, IceCube Collaboration, astro-ph.HE, hep-ex, Mathematical Sciences, Engineering, General Physics, Mathematical sciences, Physical sciences
Abstract

A diffuse flux of astrophysical neutrinos above 100 TeV has been observed at the IceCube Neutrino Observatory. Here we extend this analysis to probe the astrophysical flux down to 35 TeV and analyze its flavor composition by classifying events as showers or tracks. Taking advantage of lower atmospheric backgrounds for showerlike events, we obtain a shower-biased sample containing 129 showers and 8 tracks collected in three years from 2010 to 2013. We demonstrate consistency with the (fe:fμ:fτ)⊕≈(1:1:1)⊕ flavor ratio at Earth commonly expected from the averaged oscillations of neutrinos produced by pion decay in distant astrophysical sources. Limits are placed on nonstandard flavor compositions that cannot be produced by averaged neutrino oscillations but could arise in exotic physics scenarios. A maximally tracklike composition of (0:1:0)⊕ is excluded at 3.3σ, and a purely showerlike composition of (1:0:0)⊕ is excluded at 2.3σ.

Published
2015

4. Observation of High-Energy Astrophysical Neutrinos in 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, 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, 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, Hallen, P, and Hallgren, A

Subjects
Nuclear and Plasma Physics, Particle and High Energy Physics, Physical Sciences, IceCube Collaboration, astro-ph.HE, astro-ph.CO, hep-ex, Mathematical Sciences, Engineering, General Physics, Mathematical sciences, Physical sciences
Abstract

A search for high-energy neutrinos interacting within the IceCube detector between 2010 and 2012 provided the first evidence for a high-energy neutrino flux of extraterrestrial origin. Results from an analysis using the same methods with a third year (2012-2013) of data from the complete IceCube detector are consistent with the previously reported astrophysical flux in the 100 TeV-PeV range at the level of 10(-8)  GeV cm-2 s-1 sr-1 per flavor and reject a purely atmospheric explanation for the combined three-year data at 5.7σ. The data are consistent with expectations for equal fluxes of all three neutrino flavors and with isotropic arrival directions, suggesting either numerous or spatially extended sources. The three-year data set, with a live time of 988 days, contains a total of 37 neutrino candidate events with deposited energies ranging from 30 to 2000 TeV. The 2000-TeV event is the highest-energy neutrino interaction ever observed.

Published
2014

5. Measurement of atmospheric neutrino oscillations with IceCube.

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, Becker Tjus J, Becker KH, Bell M, Benabderrahmane ML, Benzvi S, Berdermann J, Berghaus P, Berley D, Bernardini E, Bernhard A, Bertrand D, 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, Cruz Silva AH, Danninger M, Daughhetee J, Davis JC, De Clercq C, De Ridder S, Desiati P, de With M, DeYoung T, Díaz-Vélez JC, Dunkman M, Eagan R, Eberhardt B, Eisch J, Ellsworth RW, 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, Franke R, 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, Haj Ismail A, Hallen P, Hallgren A, Halzen F, Hanson K, Heereman D, Heinen D, Helbing K, Hellauer R, Hickford S, Hill GC, Hoffman KD, Hoffmann R, Homeier A, Hoshina K, Huelsnitz W, Hulth PO, Hultqvist K, Hussain S, Ishihara A, Jacobi E, Jacobsen J, Jagielski K, Japaridze GS, Jero K, Jlelati O, Kaminsky B, Kappes A, Karg T, Karle A, Kelley JL, Kiryluk J, Kislat F, Kläs J, Klein SR, Köhne JH, Kohnen G, Kolanoski H, Köpke L, Kopper C, Kopper S, Koskinen DJ, Kowalski M, Krasberg M, Krings K, Kroll G, Kunnen J, Kurahashi N, Kuwabara T, Labare M, Landsman H, Larson MJ, Lesiak-Bzdak M, Leuermann M, Leute J, Lünemann J, Madsen J, Maruyama R, Mase K, Matis HS, McNally F, Meagher K, Merck M, Mészáros P, Meures T, Miarecki S, Middell E, Milke N, Miller J, Mohrmann L, Montaruli T, Morse R, Nahnhauer R, Naumann U, Niederhausen H, Nowicki SC, Nygren DR, Obertacke A, Odrowski S, Olivas A, Olivo M, O'Murchadha A, Palazzo A, Paul L, Pepper JA, Pérez de los Heros C, Pfendner C, Pieloth D, Pinat E, Pirk N, Posselt J, Price PB, Przybylski GT, Rädel L, Rameez M, Rawlins K, Redl P, Reimann R, Resconi E, Rhode W, Ribordy M, Richman M, Riedel B, Rodrigues JP, Rott C, Ruhe T, Ruzybayev B, Ryckbosch D, Saba SM, Salameh T, Sander HG, Santander M, Sarkar S, Schatto K, Scheel M, Scheriau F, Schmidt T, Schmitz M, Schoenen S, Schöneberg S, Schönwald A, Schukraft A, Schulte L, Schulz O, Seckel D, Sestayo Y, Seunarine S, Sheremata C, Smith MW, Soldin D, Spiczak GM, Spiering C, Stamatikos M, Stanev T, Stasik A, Stezelberger T, Stokstad RG, Stößl A, Strahler EA, Ström R, Sullivan GW, Taavola H, Taboada I, Tamburro A, Tepe A, Ter-Antonyan S, Tešić G, Tilav S, Toale PA, Toscano S, Usner M, van der Drift D, van Eijndhoven N, Van Overloop A, van Santen J, Vehring M, Voge M, Vraeghe M, Walck C, Waldenmaier T, Wallraff M, Wasserman R, Weaver Ch, Wellons M, Wendt C, Westerhoff S, Whitehorn N, Wiebe K, Wiebusch CH, Williams DR, Wissing H, Wolf M, Wood TR, Woschnagg K, Xu C, Xu DL, Xu XW, Yanez JP, Yodh G, Yoshida S, Zarzhitsky P, Ziemann J, Zierke S, and Zoll M

Abstract

We present the first statistically significant detection of neutrino oscillations in the high-energy regime (>20 GeV) from an analysis of IceCube Neutrino Observatory data collected in 2010 and 2011. This measurement is made possible by the low-energy threshold of the DeepCore detector (~20 GeV) and benefits from the use of the IceCube detector as a veto against cosmic-ray-induced muon background. The oscillation signal was detected within a low-energy muon neutrino sample (20-100 GeV) extracted from data collected by DeepCore. A high-energy muon neutrino sample (100 GeV-10 TeV) was extracted from IceCube data to constrain systematic uncertainties. The disappearance of low-energy upward-going muon neutrinos was observed, and the nonoscillation hypothesis is rejected with more than 5σ significance. In a two-neutrino flavor formalism, our data are best described by the atmospheric neutrino oscillation parameters |Δm(32)(2)|=(2.3(-0.5)(+0.6))×10(-3) eV(2) and sin(2)(2θ(23))>0.93, and maximum mixing is favored.

Published
2013
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6. First observation of PeV-energy neutrinos with IceCube.

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, Becker Tjus J, Becker KH, Bell M, Benabderrahmane ML, BenZvi S, Berdermann J, Berghaus P, Berley D, Bernardini E, Bernhard A, Bertrand D, 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, Cruz Silva AH, Danninger M, Daughhetee J, Davis JC, De Clercq C, De Ridder S, Desiati P, de With M, DeYoung T, Díaz-Vélez JC, Dunkman M, Eagan R, Eberhardt B, Eisch J, Ellsworth RW, 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, Franke R, Frantzen K, Fuchs T, Gaisser TK, Gallagher J, Gerhardt L, Gladstone L, Glüsenkamp T, Goldschmidt A, Golup G, Gonzalez JG, Goodman JA, Góra D, Grant D, Groß A, Gurtner M, Ha C, Haj Ismail A, Hallen P, Hallgren A, Halzen F, Hanson K, Heereman D, Heinen D, Helbing K, Hellauer R, Hickford S, Hill GC, Hoffman KD, Hoffmann R, Homeier A, Hoshina K, Huelsnitz W, Hulth PO, Hultqvist K, Hussain S, Ishihara A, Jacobi E, Jacobsen J, Jagielski K, Japaridze GS, Jero K, Jlelati O, Kaminsky B, Kappes A, Karg T, Karle A, Kelley JL, Kiryluk J, Kislat F, Kläs J, Klein SR, Köhne JH, Kohnen G, Kolanoski H, Köpke L, Kopper C, Kopper S, Koskinen DJ, Kowalski M, Krasberg M, Krings K, Kroll G, Kunnen J, Kurahashi N, Kuwabara T, Labare M, Landsman H, Larson MJ, Lesiak-Bzdak M, Leuermann M, Leute J, Lünemann J, Madsen J, Maruyama R, Mase K, Matis HS, McNally F, Meagher K, Merck M, Mészáros P, Meures T, Miarecki S, Middell E, Milke N, Miller J, Mohrmann L, Montaruli T, Morse R, Nahnhauer R, Naumann U, Niederhausen H, Nowicki SC, Nygren DR, Obertacke A, Odrowski S, Olivas A, Olivo M, O'Murchadha A, Paul L, Pepper JA, Pérez de los Heros C, Pfendner C, Pieloth D, Pinat E, Pirk N, Posselt J, Price PB, Przybylski GT, Rädel L, Rameez M, Rawlins K, Redl P, Reimann R, Resconi E, Rhode W, Ribordy M, Richman M, Riedel B, Rodrigues JP, Rott C, Ruhe T, Ruzybayev B, Ryckbosch D, Saba SM, Salameh T, Sander HG, Santander M, Sarkar S, Schatto K, Scheel M, Scheriau F, Schmidt T, Schmitz M, Schoenen S, Schöneberg S, Schönwald A, Schukraft A, Schulte L, Schulz O, Seckel D, Sestayo Y, Seunarine S, Sheremata C, Smith MW, Soiron M, Soldin D, Spiczak GM, Spiering C, Stamatikos M, Stanev T, Stasik A, Stezelberger T, Stokstad RG, Stößl A, Strahler EA, Ström R, Sullivan GW, Taavola H, Taboada I, Tamburro A, Ter-Antonyan S, Tešić G, Tilav S, Toale PA, Toscano S, Usner M, van der Drift D, van Eijndhoven N, Van Overloop A, van Santen J, Vehring M, Voge M, Vraeghe M, Walck C, Waldenmaier T, Wallraff M, Wasserman R, Weaver Ch, Wellons M, Wendt C, Westerhoff S, Whitehorn N, Wiebe K, Wiebusch CH, Williams DR, Wissing H, Wolf M, Wood TR, Woschnagg K, Xu C, Xu DL, Xu XW, Yanez JP, Yodh G, Yoshida S, Zarzhitsky P, Ziemann J, Zierke S, Zilles A, and Zoll M

Abstract

We report on the observation of two neutrino-induced events which have an estimated deposited energy in the IceCube detector of 1.04±0.16 and 1.14±0.17 PeV, respectively, the highest neutrino energies observed so far. These events are consistent with fully contained particle showers induced by neutral-current ν(e,μ,τ) (ν(e,μ,τ)) or charged-current ν(e) (ν(e)) interactions within the IceCube detector. The events were discovered in a search for ultrahigh energy neutrinos using data corresponding to 615.9 days effective live time. The expected number of atmospheric background is 0.082±0.004(stat)(-0.057)(+0.041)(syst). The probability of observing two or more candidate events under the atmospheric background-only hypothesis is 2.9×10(-3) (2.8σ) taking into account the uncertainty on the expected number of background events. These two events could be a first indication of an astrophysical neutrino flux; the moderate significance, however, does not permit a definitive conclusion at this time.

Published
2013
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7. Measurement of the atmospheric νe flux in IceCube.

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, Beattie K, Beatty JJ, Bechet S, Becker Tjus J, Becker KH, Bell M, Benabderrahmane ML, BenZvi S, Berdermann J, Berghaus P, Berley D, Bernardini E, Bernhard A, Bertrand D, Besson DZ, Bindig D, Bissok M, Blaufuss E, Blumenthal J, Boersma DJ, Bohaichuk S, Bohm C, Bose D, Böser S, Botner O, Brayeur L, Brown AM, Bruijn R, Brunner J, Buitink S, Carson M, Casey J, Casier M, Chirkin D, Christy B, Clark K, Clevermann F, Cohen S, Cowen DF, Cruz Silva AH, Danninger M, Daughhetee J, Davis JC, De Clercq C, De Ridder S, Desiati P, de Vries-Uiterweerd G, de With M, DeYoung T, Díaz-Vélez JC, Dreyer J, Dunkman M, Eagan R, Eberhardt B, Eisch J, Ellsworth RW, Engdegård O, 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, Franke R, Frantzen K, Fuchs T, Gaisser TK, Gallagher J, Gerhardt L, Gladstone L, Glüsenkamp T, Goldschmidt A, Golup G, Goodman JA, Góra D, Grant D, Groß A, Gurtner M, Ha C, Haj Ismail A, Hallgren A, Halzen F, Hanson K, Heereman D, Heimann P, Heinen D, Helbing K, Hellauer R, Hickford S, Hill GC, Hoffman KD, Hoffmann R, Homeier A, Hoshina K, Huelsnitz W, Hulth PO, Hultqvist K, Hussain S, Ishihara A, Jacobi E, Jacobsen J, Japaridze GS, Jero K, Jlelati O, Kaminsky B, Kappes A, Karg T, Karle A, Kelley JL, Kiryluk J, Kislat F, Kläs J, Klein SR, Köhne JH, Kohnen G, Kolanoski H, Köpke L, Kopper C, Kopper S, Koskinen DJ, Kowalski M, Krasberg M, Kroll G, Kunnen J, Kurahashi N, Kuwabara T, Labare M, Landsman H, Larson MJ, Lesiak-Bzdak M, Leute J, Lünemann J, Madsen J, Maruyama R, Mase K, Matis HS, McNally F, Meagher K, Merck M, Mészáros P, Meures T, Miarecki S, Middell E, Milke N, Miller J, Mohrmann L, Montaruli T, Morse R, Nahnhauer R, Naumann U, Niederhausen H, Nowicki SC, Nygren DR, Obertacke A, Odrowski S, Olivas A, Olivo M, O'Murchadha A, Panknin S, Paul L, Pepper JA, Pérez de los Heros C, Pfendner C, Pieloth D, Pirk N, Posselt J, Price PB, Przybylski GT, Rädel L, Rawlins K, Redl P, Resconi E, Rhode W, Ribordy M, Richman M, Riedel B, Rodrigues JP, Rott C, Ruhe T, Ruzybayev B, Ryckbosch D, Saba SM, Salameh T, Sander HG, Santander M, Sarkar S, Schatto K, Scheel M, Scheriau F, Schmidt T, Schmitz M, Schoenen S, Schöneberg S, Schönherr L, Schönwald A, Schukraft A, Schulte L, Schulz O, Seckel D, Seo SH, Sestayo Y, Seunarine S, Sheremata C, Smith MW, Soiron M, Soldin D, Spiczak GM, Spiering C, Stamatikos M, Stanev T, Stasik A, Stezelberger T, Stokstad RG, Stößl A, Strahler EA, Ström R, Sullivan GW, Taavola H, Taboada I, Tamburro A, Ter-Antonyan S, Tilav S, Toale PA, Toscano S, Usner M, van der Drift D, van Eijndhoven N, Van Overloop A, van Santen J, Vehring M, Voge M, Vraeghe M, Walck C, Waldenmaier T, Wallraff M, Wasserman R, Weaver Ch, Wellons M, Wendt C, Westerhoff S, Whitehorn N, Wiebe K, Wiebusch CH, Williams DR, Wissing H, Wolf M, Wood TR, Woschnagg K, Xu C, Xu DL, Xu XW, Yanez JP, Yodh G, Yoshida S, Zarzhitsky P, Ziemann J, Zierke S, Zilles A, and Zoll M

Abstract

We report the first measurement of the atmospheric electron neutrino flux in the energy range between approximately 80 GeV and 6 TeV, using data recorded during the first year of operation of IceCube's DeepCore low-energy extension. Techniques to identify neutrinos interacting within the DeepCore volume and veto muons originating outside the detector are demonstrated. A sample of 1029 events is observed in 281 days of data, of which 496±66(stat)±88(syst) are estimated to be cascade events, including both electron neutrino and neutral current events. The rest of the sample includes residual backgrounds due to atmospheric muons and charged current interactions of atmospheric muon neutrinos. The flux of the atmospheric electron neutrinos is consistent with models of atmospheric neutrinos in this energy range. This constitutes the first observation of electron neutrinos and neutral current interactions in a very large volume neutrino telescope optimized for the TeV energy range.

Published
2013
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8. Search for dark matter annihilations in the sun with the 79-string IceCube detector.

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, Beattie K, Beatty JJ, Bechet S, Becker Tjus J, Becker KH, Bell M, Benabderrahmane ML, BenZvi S, Berdermann J, Berghaus P, Berley D, Bernardini E, Bernhard A, Bertrand D, Besson DZ, Bindig D, Bissok M, Blaufuss E, Blumenthal J, Boersma DJ, Bohaichuk S, Bohm C, Bose D, Böser S, Botner O, Brayeur L, Brown AM, Bruijn R, Brunner J, Buitink S, Carson M, Casey J, Casier M, Chirkin D, Christy B, Clark K, Clevermann F, Cohen S, Cowen DF, Cruz Silva AH, Danninger M, Daughhetee J, Davis JC, De Clercq C, De Ridder S, Desiati P, de Vries-Uiterweerd G, de With M, DeYoung T, Díaz-Vélez JC, Dreyer J, Dunkman M, Eagan R, Eberhardt B, Eisch J, Ellsworth RW, Engdegård O, 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, Franke R, Frantzen K, Fuchs T, Gaisser TK, Gallagher J, Gerhardt L, Gladstone L, Glüsenkamp T, Goldschmidt A, Golup G, Goodman JA, Góra D, Grant D, Groß A, Gurtner M, Ha C, Haj Ismail A, Hallgren A, Halzen F, Hanson K, Heereman D, Heimann P, Heinen D, Helbing K, Hellauer R, Hickford S, Hill GC, Hoffman KD, Hoffmann R, Homeier A, Hoshina K, Huelsnitz W, Hulth PO, Hultqvist K, Hussain S, Ishihara A, Jacobi E, Jacobsen J, Japaridze GS, Jero K, Jlelati O, Kaminsky B, Kappes A, Karg T, Karle A, Kelley JL, Kiryluk J, Kislat F, Kläs J, Klein SR, Köhne JH, Kohnen G, Kolanoski H, Köpke L, Kopper C, Kopper S, Koskinen DJ, Kowalski M, Krasberg M, Kroll G, Kunnen J, Kurahashi N, Kuwabara T, Labare M, Landsman H, Larson MJ, Lesiak-Bzdak M, Leute J, Lünemann J, Madsen J, Maruyama R, Mase K, Matis HS, McNally F, Meagher K, Merck M, Mészáros P, Meures T, Miarecki S, Middell E, Milke N, Miller J, Mohrmann L, Montaruli T, Morse R, Nahnhauer R, Naumann U, Niederhausen H, Nowicki SC, Nygren DR, Obertacke A, Odrowski S, Olivas A, Olivo M, O'Murchadha A, Paul L, Pepper JA, Pérez de los Heros C, Pfendner C, Pieloth D, Pirk N, Posselt J, Price PB, Przybylski GT, Rädel L, Rawlins K, Redl P, Resconi E, Rhode W, Ribordy M, Richman M, Riedel B, Rodrigues JP, Rott C, Ruhe T, Ruzybayev B, Ryckbosch D, Saba SM, Salameh T, Sander HG, Santander M, Sarkar S, Schatto K, Scheel M, Scheriau F, Schmidt T, Schmitz M, Schoenen S, Schöneberg S, Schönherr L, Schönwald A, Schukraft A, Schulte L, Schulz O, Seckel D, Seo SH, Sestayo Y, Seunarine S, Sheremata C, Smith MW, Soiron M, Soldin D, Spiczak GM, Spiering C, Stamatikos M, Stanev T, Stasik A, Stezelberger T, Stokstad RG, Stößl A, Strahler EA, Ström R, Sullivan GW, Taavola H, Taboada I, Tamburro A, Ter-Antonyan S, Tilav S, Toale PA, Toscano S, Usner M, van der Drift D, van Eijndhoven N, Van Overloop A, van Santen J, Vehring M, Voge M, Vraeghe M, Walck C, Waldenmaier T, Wallraff M, Wasserman R, Weaver Ch, Wellons M, Wendt C, Westerhoff S, Whitehorn N, Wiebe K, Wiebusch CH, Williams DR, Wissing H, Wolf M, Wood TR, Woschnagg K, Xu C, Xu DL, Xu XW, Yanez JP, Yodh G, Yoshida S, Zarzhitsky P, Ziemann J, Zierke S, Zilles A, and Zoll M

Abstract

We have performed a search for muon neutrinos from dark matter annihilation in the center of the Sun with the 79-string configuration of the IceCube neutrino telescope. For the first time, the DeepCore subarray is included in the analysis, lowering the energy threshold and extending the search to the austral summer. The 317 days of data collected between June 2010 and May 2011 are consistent with the expected background from atmospheric muons and neutrinos. Upper limits are set on the dark matter annihilation rate, with conversions to limits on spin-dependent and spin-independent scattering cross sections of weakly interacting massive particles (WIMPs) on protons, for WIMP masses in the range 20-5000  GeV/c2. These are the most stringent spin-dependent WIMP-proton cross section limits to date above 35  GeV/c2 for most WIMP models.

Published
2013
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9. Limits on neutrino emission from gamma-ray bursts with the 40 string IceCube detector.

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, Bindig D, Bissok M, Blaufuss E, Blumenthal J, Boersma DJ, Bohm C, Bose D, Böser S, Botner O, Braun J, Brown AM, Buitink S, Carson M, Chirkin D, Christy B, Clem J, Clevermann F, Cohen S, Colnard C, Cowen DF, D'Agostino MV, Danninger M, Daughhetee J, 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, Ehrlich R, Eisch J, Ellsworth RW, Engdegård O, Euler S, Evenson PA, Fadiran O, Fazely AR, Fedynitch A, Feusels T, Filimonov K, Finley C, Fischer-Wasels T, 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, Heinen D, Helbing K, Herquet P, Hickford S, Hill GC, Hoffman KD, Homeier A, Hoshina K, Hubert D, Huelsnitz W, Hülss JP, Hulth PO, Hultqvist K, Hussain S, Ishihara A, Jacobsen J, Japaridze GS, Johansson H, Joseph JM, Kampert KH, Kappes A, Karg T, Karle A, Kelley JL, Kemming N, Kenny P, Kiryluk J, Kislat F, Klein SR, Köhne JH, Kohnen G, Kolanoski H, Köpke L, Kopper S, Koskinen DJ, Kowalski M, Kowarik T, Krasberg M, Krings T, Kroll G, Kuehn K, Kuwabara T, Labare M, Lafebre S, Laihem K, Landsman H, Larson MJ, Lauer R, Lehmann R, Lünemann J, Madsen J, Majumdar P, Marotta A, Maruyama R, Mase K, Matis HS, Meagher K, Merck M, Mészáros P, Meures T, Middell E, Milke N, Miller J, Montaruli T, Morse R, Movit SM, Nahnhauer R, Nam JW, Naumann U, Niessen P, Nygren DR, Odrowski S, Olivas A, Olivo M, O'Murchadha A, Ono M, Panknin S, Paul L, Pérez de los Heros C, Petrovic J, Piegsa A, Pieloth D, Porrata R, Posselt J, Price PB, Prikockis M, Przybylski GT, Rawlins K, Redl P, Resconi E, Rhode W, Ribordy M, Rizzo A, Rodrigues JP, Roth P, Rothmaier F, Rott C, Ruhe T, Rutledge D, Ruzybayev B, Ryckbosch D, Sander HG, Santander M, Sarkar S, Schatto K, Schmidt T, Schoenwald A, Schukraft A, Schultes A, Schulz O, Schunck M, Seckel D, Semburg B, Seo SH, Sestayo Y, Seunarine S, Silvestri A, Slipak A, Spiczak GM, Spiering C, Stamatikos M, Stanev T, Stephens G, Stezelberger T, Stokstad RG, Stoyanov S, Strahler EA, Straszheim T, Sullivan GW, Swillens Q, Taavola H, Taboada I, Tamburro A, Tarasova O, Tepe A, Ter-Antonyan S, Tilav S, Toale PA, Toscano S, Tosi D, Turčan D, van Eijndhoven N, Vandenbroucke J, Van Overloop A, van Santen J, Vehring M, Voge M, Voigt B, Walck C, Waldenmaier T, Wallraff M, Walter M, Weaver C, Wendt C, Westerhoff S, Whitehorn N, Wiebe K, Wiebusch CH, Williams DR, Wischnewski R, Wissing H, Wolf M, Woschnagg K, Xu C, Xu XW, Yodh G, Yoshida S, and Zarzhitsky P

Abstract

IceCube has become the first neutrino telescope with a sensitivity below the TeV neutrino flux predicted from gamma-ray bursts if gamma-ray bursts are responsible for the observed cosmic-ray flux above 10(18)  eV. Two separate analyses using the half-complete IceCube detector, one a dedicated search for neutrinos from pγ interactions in the prompt phase of the gamma-ray burst fireball and the other a generic search for any neutrino emission from these sources over a wide range of energies and emission times, produced no evidence for neutrino emission, excluding prevailing models at 90% confidence.

Published
2011
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10. Effects of pairing potential scattering on Fourier-transformed inelastic tunneling spectra of high-Tc cuprate superconductors with bosonic modes.

Author

Zhu JX, McElroy K, Lee J, Devereaux TP, Si Q, Davis JC, and Balatsky AV

Abstract

Recent scanning tunneling microscopy (STM) experimentally observed strong gap inhomogeneity in Bi2Sr2CaCu2O(8+delta) (BSCCO). We argue that disorder in the pair potential underlies the gap inhomogeneity, and investigate its role in the Fourier-transformed inelastic tunneling spectra as revealed in the STM. We find that the random pair potential induces unique q-space patterns in the local density of states (LDOS) of a d-wave superconductor. We consider the effects of electron coupling to various bosonic modes and find the pattern of LDOS modulation due to coupling to the B(1g) phonon mode to be consistent with the one observed in the inelastic electron tunnneling STM experiment in BSCCO. These results suggest strong electron-lattice coupling as an essential part of the superconducting state in high-Tc materials.

Published
2006
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11. Coincidence of checkerboard charge order and antinodal state decoherence in strongly underdoped superconducting Bi2Sr2CaCu2O8 + delta).

Author

McElroy K, Lee DH, Hoffman JE, Lang KM, Lee J, Hudson EW, Eisaki H, Uchida S, and Davis JC

Abstract

The doping dependence of nanoscale electronic structure in superconducting Bi(2)Sr(2)CaCu(2)O(8 + delta) is studied by scanning tunneling microscopy. At all dopings, the low energy density-of-states modulations are analyzed according to a simple model of quasiparticle interference and found to be consistent with Fermi-arc superconductivity. The superconducting coherence peaks, ubiquitous in near-optimal tunneling spectra, are destroyed with strong underdoping and a new spectral type appears. Exclusively in regions exhibiting this new spectrum, we find local "checkerboard" charge ordering of high energy states, with a wave vector of Q = (+/- 2pi/4.5a(0),0); (0, +/- 2pi/4.5a(0)) +/- 15%. Surprisingly, this spatial ordering of high energy states coexists harmoniously with the low energy Bogoliubov quasiparticle states.

Published
2005
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12. Nanoscale one-dimensional scattering resonances in the CuO chains of YBa(2)Cu(3)O(6+x).

Author

Derro DJ, Hudson EW, Lang KM, Pan SH, Davis JC, Markert JT, and de Lozanne AL

Abstract

We present scanning tunneling spectroscopy measurements of the CuO chain plane in YBa(2)Cu(3)O(6+x), showing an approximately 25 meV gap in the local density of states (LDOS) filled by numerous intragap resonances: intense peaks in LDOS spectra associated with one-dimensional, Friedel-like oscillations. We discuss how these phenomena shed light on recent results from other probes, as well as their implications for phenomena in the superconducting CuO(2) plane.

Published
2002
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13. Observation of the superfluid shapiro effect in a 3He weak link.

Author

Simmonds RW, Marchenkov A, Davis JC, and Packard RE

Abstract

We have studied the mass currents through a superfluid 3He Josephson weak link in the presence of an externally applied ac pressure modulation. Characteristic changes in the dc mass currents are observed whenever the superfluid Josephson frequency omega(J) is an integer multiple of the ac modulation frequency omega. The measured dependencies of these current changes on ac pressure amplitude are in excellent agreement with theory describing quantum phase dynamics of superfluid 3He weak links. These results establish the superfluid analog of the superconducting Shapiro effect.

Published
2001
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14. STM studies of the electronic structure of vortex cores in Bi(2)Sr(2)CaCu(2)O(8+delta)

Author

Pan SH, Hudson EW, Gupta AK, Ng K, Eisaki H, Uchida S, and Davis JC

Abstract

We report on low temperature scanning tunneling microscopy (STM) studies of the electronic structure of vortex cores in Bi 2Sr 2CaCu 2O (8+delta). At the vortex core center, an enhanced density of states is observed at energies near Omega = +/-7 meV. Spectroscopic imaging at these energies reveals an exponential decay of these "core states" with a decay length of 22+/-3 A. The fourfold symmetry sometimes predicted for d-wave vortices is not seen in spectroscopic vortex images. A locally nodeless order parameter induced by the magnetic field may be consistent with these measurements.

Published
2000
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15. New flow dissipation mechanisms in superfluid 3He.

Author

Simmonds RW, Marchenkov A, Vitale S, Davis JC, and Packard RE

Abstract

We have studied the flow of superfluid 3He-B forced through small apertures. There are unexpectedly large dissipative currents, which can be described by two independent processes. One process involves the creation of quasiparticles within the aperture and their subsequent acceleration in the ambient pressure gradient. The second process involves the dissipative precession of a texture in a geometry-induced anisotropic order parameter. For both mechanisms we make a simple estimate of the relevant effect and find these agree well with the data.

Published
2000
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