Flavor Ratio of Astrophysical Neutrinos above 35 TeV in IceCube

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ID: 269641
2015
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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.
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Authors M. G. Aartsen,Markus Ackermann,J. Adams,J. A. Aguilar,Markus Ahlers,M. Ahrens,D. Altmann,T. Anderson,C. Arguelles,T. C. Arlen,J. Auffenberg,X. Bai,S. W. Barwick,V. Baum,R. Bay,James Beatty,Julia Tjus,K.-H. Becker,Segev BenZvi,P. Berghaus,D. Berley,Elisa Bernardini,A. Bernhard,D. Z. Besson,G. Binder,D. Bindig,M. Bissok,E. Blaufuss,J. Blumenthal,D. J. Boersma,C. Bohm,F. Bos,D. Bose,S. Böser,O. Botner,L. Brayeur,H.-P. Bretz,Anthony Brown,N. Buzinsky,J. Casey,M. Casier,E. Cheung,D. Chirkin,Asen Christov,B. Christy,K. Clark,L. Classen,F. Clevermann,S. Coenders,D. F. Cowen,A. H. Cruz Silva,J. Daughhetee,J. C. Davis,M. Day,João Pedro Athayde Marcondes de André,Catherine De Clercq,Hans Dembinski,S. De Ridder,Paolo Desiati,Krijn de Vries,M. De With,Tyce DeYoung,Juan Carlos Díaz Vélez,J. P. Dumm,M. Dunkman,R. Eagan,B. Eberhardt,T. Ehrhardt,B. Eichmann,J. Eisch,S. Euler,P. A. Evenson,O. Fadiran,A. R. Fazely,A. Fedynitch,J. Feintzeig,J. Felde,K. Filimonov,C. Finley,T. Fischer-Wasels,S. Flis,K. Frantzen,T. Fuchs,T. K. Gaisser,R. Gaior,J. Gallagher,L. Gerhardt,D. Gier,L. Gladstone,T. Glüsenkamp,A. Goldschmidt,G. Golup,J. G. Gonzalez,Jordan Goodman,Dariusz Gora,D. Grant,P. Gretskov,John Groh,A. Groß,C. Ha,C. Haack,Abd Al Karim Haj Ismail,P. Hallen,A. Hallgren,F. Halzen,K. Hanson,D. Hebecker,D. Heereman,Dirk Heinen,Klaus Helbing,R. Hellauer,D. Hellwig,S. Hickford,Gary Hill,K. D. Hoffman,R. Hoffmann,A. Homeier,K. Hoshina,Feifei Huang,W. Huelsnitz,P. O. Hulth,K. Hultqvist,A. Ishihara,E. Jacobi,J. Jacobsen,G. S. Japaridze,K. Jero,M. Jurkovic,B. Kaminsky,Alexander Kappes,Timo Karg,A. Karle,Matthew Kauer,Azadeh Keivani,J. L. Kelley,A. Kheirandish,J. Kiryluk,J. Kläs,Spencer Klein,J.-H. Köhne,G. Kohnen,Hermann Kolanoski,A. Koob,L. Köpke,C. Kopper,S. Kopper,David Koskinen,Marek Kowalski,A. Kriesten,K. Krings,G. Kroll,M. Kroll,J. Kunnen,N. Kurahashi,T. Kuwabara,M. Labare,J. L. Lanfranchi,Dag Toppe Larsen,M. J. Larson,M. Lesiak-Bzdak,M. Leuermann,J. Lünemann,J. Madsen,G. Maggi,Reina Maruyama,K. Mase,H. S. Matis,R. Maunu,F. McNally,Kevin Meagher,M. Medici,A. Meli,T. Meures,S. Miarecki,E. Middell,E. Middlemas,N. Milke,Jonathan Miller,Lars Mohrmann,Teresa Montaruli,R. Morse,R. Nahnhauer,U. Naumann,H. Niederhausen,S. C. Nowicki,D. R. Nygren,A. Obertacke,A. Olivas,A. Omairat,A. O’Murchadha,T. Palczewski,L. Paul,Ö. Penek,J. A. Pepper,Carlos Pérez De Los Heros,C. Pfendner,D. Pieloth,E. Pinat,J. Posselt,P. B. Price,G. T. Przybylski,J. Pütz,M. Quinnan,L. Rädel,M. Rameez,K. Rawlins,P. Redl,I. Rees,R. Reimann,M. Relich,Elisa Resconi,W. Rhode,M. Richman,B. Riedel,S. Robertson,J. P. Rodrigues,M. Rongen,Carsten Rott,T. Ruhe,B. Ruzybayev,D. Ryckbosch,S. M. Saba,H.-G. Sander,J. Sandroos,Juan Marcos Santander,Subir Sarkar,K. Schatto,F. Scheriau,T. Schmidt,M. Schmitz,S. Schoenen,S. Schöneberg,A. Schönwald,Anne Schukraft,L. Schulte,O. Schulz,D. Seckel,Y. Sestayo,S. Seunarine,R. Shanidze,M. W. E. Smith,D. Soldin,G. M. Spiczak,C. Spiering,M. Stamatikos,T. Stanev,N. A. Stanisha,A. Stasik,T. Stezelberger,R. G. Stokstad,A. Stößl,E. A. Strahler,Rickard Ström,Nora Linn Strotjohann,G. W. Sullivan,Henric Taavola,I. Taboada,A. Tamburro,Samvel Ter-Antonyan,A. Terliuk,G. Tešić,S. Tilav,P. A. Toale,M. N. Tobin,D. Tosi,M. Tselengidou,E. Unger,M. Usner,S. Vallecorsa,Nick van Eijndhoven,J. Vandenbroucke,J. Van Santen,S. Vanheule,M. Vehring,M. Voge,M. Vraeghe,C. Walck,M. Wallraff,Ch. Weaver,M. Wellons,C. Wendt,S. Westerhoff,B. J. Whelan,N. Whitehorn,C. Wichary,K. Wiebe,C. H. Wiebusch,D. R. Williams,H. Wissing,M. Wolf,T. R. Wood,K. Woschnagg,D. L. Xu,X. W. Xu,Y. Xu,J. P. Yanez,G. Yodh,Shigeru Yoshida,P. Zarzhitsky,J. Ziemann,M. Zoll,IceCube Collaboration;M. G. Aartsen;Markus Ackermann;J. Adams;J. A. Aguilar;Markus Ahlers;M. Ahrens;D. Altmann;T. Anderson;C. Arguelles;T. C. Arlen;J. Auffenberg;X. Bai;S. W. Barwick;V. Baum;R. Bay;James Beatty;Julia Tjus;K.-H. Becker;Segev BenZvi;P. Berghaus;D. Berley;Elisa Bernardini;A. Bernhard;D. Z. Besson;G. Binder;D. Bindig;M. Bissok;E. Blaufuss;J. Blumenthal;D. J. Boersma;C. Bohm;F. Bos;D. Bose;S. Böser;O. Botner;L. Brayeur;H.-P. Bretz;Anthony Brown;N. Buzinsky;J. Casey;M. Casier;E. Cheung;D. Chirkin;Asen Christov;B. Christy;K. Clark;L. Classen;F. Clevermann;S. Coenders;D. F. Cowen;A. H. Cruz Silva;J. Daughhetee;J. C. Davis;M. Day;João Pedro Athayde Marcondes de André;Catherine De Clercq;Hans Dembinski;S. De Ridder;Paolo Desiati;Krijn de Vries;M. De With;Tyce DeYoung;Juan Carlos Díaz Vélez;J. P. Dumm;M. Dunkman;R. Eagan;B. Eberhardt;T. Ehrhardt;B. Eichmann;J. Eisch;S. Euler;P. A. Evenson;O. Fadiran;A. R. Fazely;A. Fedynitch;J. Feintzeig;J. Felde;K. Filimonov;C. Finley;T. Fischer-Wasels;S. Flis;K. Frantzen;T. Fuchs;T. K. Gaisser;R. Gaior;J. Gallagher;L. Gerhardt;D. Gier;L. Gladstone;T. Glüsenkamp;A. Goldschmidt;G. Golup;J. G. Gonzalez;Jordan Goodman;Dariusz Gora;D. Grant;P. Gretskov;John Groh;A. Groß;C. Ha;C. Haack;Abd Al Karim Haj Ismail;P. Hallen;A. Hallgren;F. Halzen;K. Hanson;D. Hebecker;D. Heereman;Dirk Heinen;Klaus Helbing;R. Hellauer;D. Hellwig;S. Hickford;Gary Hill;K. D. Hoffman;R. Hoffmann;A. Homeier;K. Hoshina;Feifei Huang;W. Huelsnitz;P. O. Hulth;K. Hultqvist;A. Ishihara;E. Jacobi;J. Jacobsen;G. S. Japaridze;K. Jero;M. Jurkovic;B. Kaminsky;Alexander Kappes;Timo Karg;A. Karle;Matthew Kauer;Azadeh Keivani;J. L. Kelley;A. Kheirandish;J. Kiryluk;J. Kläs;Spencer Klein;J.-H. Köhne;G. Kohnen;Hermann Kolanoski;A. Koob;L. Köpke;C. Kopper;S. Kopper;David Koskinen;Marek Kowalski;A. Kriesten;K. Krings;G. Kroll;M. Kroll;J. Kunnen;N. Kurahashi;T. Kuwabara;M. Labare;J. L. Lanfranchi;Dag Toppe Larsen;M. J. Larson;M. Lesiak-Bzdak;M. Leuermann;J. Lünemann;J. Madsen;G. Maggi;Reina Maruyama;K. Mase;H. S. Matis;R. Maunu;F. McNally;Kevin Meagher;M. Medici;A. Meli;T. Meures;S. Miarecki;E. Middell;E. Middlemas;N. Milke;Jonathan Miller;Lars Mohrmann;Teresa Montaruli;R. Morse;R. Nahnhauer;U. Naumann;H. Niederhausen;S. C. Nowicki;D. R. Nygren;A. Obertacke;A. Olivas;A. Omairat;A. O’Murchadha;T. Palczewski;L. Paul;Ö. Penek;J. A. Pepper;Carlos Pérez De Los Heros;C. Pfendner;D. Pieloth;E. Pinat;J. Posselt;P. B. Price;G. T. Przybylski;J. Pütz;M. Quinnan;L. Rädel;M. Rameez;K. Rawlins;P. Redl;I. Rees;R. Reimann;M. Relich;Elisa Resconi;W. Rhode;M. Richman;B. Riedel;S. Robertson;J. P. Rodrigues;M. Rongen;Carsten Rott;T. Ruhe;B. Ruzybayev;D. Ryckbosch;S. M. Saba;H.-G. Sander;J. Sandroos;Juan Marcos Santander;Subir Sarkar;K. Schatto;F. Scheriau;T. Schmidt;M. Schmitz;S. Schoenen;S. Schöneberg;A. Schönwald;Anne Schukraft;L. Schulte;O. Schulz;D. Seckel;Y. Sestayo;S. Seunarine;R. Shanidze;M. W. E. Smith;D. Soldin;G. M. Spiczak;C. Spiering;M. Stamatikos;T. Stanev;N. A. Stanisha;A. Stasik;T. Stezelberger;R. G. Stokstad;A. Stößl;E. A. Strahler;Rickard Ström;Nora Linn Strotjohann;G. W. Sullivan;Henric Taavola;I. Taboada;A. Tamburro;Samvel Ter-Antonyan;A. Terliuk;G. Tešić;S. Tilav;P. A. Toale;M. N. Tobin;D. Tosi;M. Tselengidou;E. Unger;M. Usner;S. Vallecorsa;Nick van Eijndhoven;J. Vandenbroucke;J. Van Santen;S. Vanheule;M. Vehring;M. Voge;M. Vraeghe;C. Walck;M. Wallraff;Ch. Weaver;M. Wellons;C. Wendt;S. Westerhoff;B. J. Whelan;N. Whitehorn;C. Wichary;K. Wiebe;C. H. Wiebusch;D. R. Williams;H. Wissing;M. Wolf;T. R. Wood;K. Woschnagg;D. L. Xu;X. W. Xu;Y. Xu;J. P. Yanez;G. Yodh;Shigeru Yoshida;P. Zarzhitsky;J. Ziemann;M. Zoll;IceCube Collaboration;
Journal physical review letters
Year 2015
DOI
10.1103/physrevlett.114.171102
URL
https://sciprofiles.com/publication/view/9c3b57ef333772384b4b819446cb85c6
Keywords
physical sciences

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