# Flavor Ratio of Astrophysical Neutrinos above 35 TeV in IceCube.

@article{Aartsen2015FlavorRO, title={Flavor Ratio of Astrophysical Neutrinos above 35 TeV in IceCube.}, author={M. Aartsen and M. Ackermann and J. Adams and J. A. Aguilar and M. Ahlers and M. Ahrens and D. Altmann and T. Anderson and C. Arguelles and T. Arlen and J. Auffenberg and X. Bai and S. Barwick and V. Baum and R. Bay and J. Beatty and J. Becker Tjus and K. Becker and S. BenZvi and P. Berghaus and D. Berley and E. Bernardini and A. Bernhard and D. Besson and G. Binder and D. Bindig and M. Bissok and E. Blaufuss and J. Blumenthal and D. Boersma and C. Bohm and F. Bos and D. Bose and S. B{\"o}ser and O. Botner and L. Brayeur and H. Bretz and A. Brown and N. Buzinsky and J. Casey and M. Casier and E. Cheung and D. Chirkin and A. Christov and B. Christy and K. Clark and L. Classen and F. Clevermann and S. Coenders and D. Cowen and A. H. Cruz Silva and J. Daughhetee and J. C. Davis and M. Day and J. P. A. M. de Andr{\'e} and C. De Clercq and H. Dembinski and S. de Ridder and P. Desiati and K. D. de Vries and M. de With and T. DeYoung and J. C. D{\'i}az-V{\'e}lez and J. Dumm and M. Dunkman and R. Eagan and B. Eberhardt and T. Ehrhardt and B. Eichmann and J. Eisch and S. Euler and P. Evenson and O. Fadiran and A. Fazely and A. Fedynitch and J. Feintzeig and J. Felde and K. Filimonov and C. Finley and T. Fischer-Wasels and S. Flis and K. Frantzen and T. Fuchs and T. Gaisser and R. Gaior and J. Gallagher and L. Gerhardt and D. Gier and L. Gladstone and T. Gl{\"u}senkamp and A. Goldschmidt and G. Golup and J. G. Gonzalez and J. Goodman and D. G{\'o}ra and D. Grant and P. Gretskov and J. Groh and A. Gro{\ss} and C. Ha and C. Haack and A. Haj Ismail and P. Hallen and A. Hallgren and F. Halzen and K. Hanson and D. Hebecker and D. Heereman and D. Heinen and K. Helbing and R. Hellauer and D. Hellwig and S. Hickford and G. Hill and K. Hoffman and R. Hoffmann and A. Homeier and K. Hoshina and F. Huang and W. Huelsnitz and P. O. Hulth and K. Hultqvist and A. Ishihara and E. Jacobi and J. Jacobsen and G. Japaridze and K. Jero and M. Jurkovic and B. Kaminsky and A. Kappes and T. Karg and A. Karle and M. Kauer and A. Keivani and J. Kelley and A. Kheirandish and J. Kiryluk and J. Kl{\"a}s and S. Klein and J. K{\"o}hne and G. Kohnen and H. Kolanoski and A. Koob and L. K{\"o}pke and C. Kopper and S. Kopper and D. Koskinen and M. Kowalski and A. Kriesten and K. Krings and G. Kroll and M. Kroll and J. Kunnen and N. Kurahashi and T. Kuwabara and M. Labare and J. Lanfranchi and D. T. Larsen and M. Larson and M. Lesiak-Bzdak and M. Leuermann and J. L{\"u}nemann and J. Madsen and G. Maggi and R. Maruyama and K. Mase and H. Matis and R. Maunu and F. McNally and K. Meagher and M. Medici and A. Meli and T. Meures and S. Miarecki and E. Middell and E. Middlemas and N. Milke and J. Miller and L. Mohrmann and T. Montaruli and R. Morse and R. Nahnhauer and U. Naumann and H. Niederhausen and S. Nowicki and D. Nygren and A. Obertacke and A. Olivas and A. Omairat and A. O'Murchadha and T. Palczewski and L. Paul and {\"O}. Penek and J. Pepper and C. P{\'e}rez de los Heros and C. Pfendner and D. Pieloth and E. Pinat and J. Posselt and P. Price and G. Przybylski and J. P{\"u}tz and M. Quinnan and L. R{\"a}del and M. Rameez and K. Rawlins and P. Redl and I. Rees and R. Reimann and M. Relich and E. Resconi and W. Rhode and M. Richman and B. Riedel and S. Robertson and J. P. Rodrigues and M. Rongen and C. Rott and T. Ruhe and B. Ruzybayev and D. Ryckbosch and S. M. Saba and H. Sander and J. Sandroos and M. Santander and S. Sarkar and K. Schatto and F. Scheriau and T. Schmidt and M. Schmitz and S. Schoenen and S. Sch{\"o}neberg and A. Sch{\"o}nwald and A. Schukraft and L. Schulte and O. Schulz and D. Seckel and Y. Sestayo and S. Seunarine and R. Shanidze and M. Smith and D. Soldin and G. Spiczak and C. Spiering and M. Stamatikos and T. Stanev and N. A. Stanisha and Alexander Stasik and T. Stezelberger and R. Stokstad and A. St{\"o}{\ss}l and E. Strahler and R. Str{\"o}m and N. Strotjohann and G. Sullivan and H. Taavola and I. Taboada and A. Tamburro and S. Ter-Antonyan and A. Terliuk and G. Tesic and S. Tilav and P. A. Toale and M. Tobin and D. Tosi and M. Tselengidou and E. Unger and M. Usner and S. Vallecorsa and N. van Eijndhoven and J. Vandenbroucke and J. van Santen and S. Vanheule and M. Vehring and M. Voge and M. Vraeghe and C. Walck and M. Wallraff and C. Weaver and M. Wellons and C. Wendt and S. Westerhoff and B. Whelan and N. Whitehorn and C. Wichary and K. Wiebe and C. Wiebusch and D. Williams and H. Wissing and M. Wolf and T. R. Wood and K. Woschnagg and D. Xu and X. Xu and Y. Xu and J. Y{\'a}{\~n}ez and G. Yodh and S. Yoshida and P. Zarzhitsky and J. Ziemann and M. Zoll}, journal={Physical review letters}, year={2015}, volume={114 17}, pages={ 171102 } }

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:f… Expand

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