Characterization of the Astrophysical Diffuse Neutrino Flux using
Starting Track Events in IceCube
R. Abbasi,M. Ackermann,J. Adams,S. K. Agarwalla,J. A. Aguilar,M. Ahlers,J. M. Alameddine,N. M. Amin,K. Andeen,G. Anton,C. Argüelles,Y. Ashida,S. Athanasiadou,L. Ausborm,S. N. Axani,X. Bai,A. Balagopal V.,M. Baricevic,S. W. Barwick,S. Bash,V. Basu,R. Bay,J. J. Beatty,J. Becker Tjus,J. Beise,C. Bellenghi,C. Benning,S. BenZvi,D. Berley,E. Bernardini,D. Z. Besson,E. Blaufuss,S. Blot,F. Bontempo,J. Y. Book,C. Boscolo Meneguolo,S. Böser,O. Botner,J. Böttcher,J. Braun,B. Brinson,J. Brostean-Kaiser,L. Brusa,R. T. Burley,R. S. Busse,D. Butterfield,M. A. Campana,I. Caracas,K. Carloni,J. Carpio,S. Chattopadhyay,N. Chau,Z. Chen,D. Chirkin,S. Choi,B. A. Clark,A. Coleman,G. H. Collin,A. Connolly,J. M. Conrad,P. Coppin,R. Corley,P. Correa,D. F. Cowen,P. Dave,C. De Clercq,J. J. DeLaunay,D. Delgado,S. Deng,K. Deoskar,A. Desai,P. Desiati,K. D. de Vries,G. de Wasseige,T. DeYoung,A. Diaz,J. C. Díaz-Vélez,M. Dittmer,A. Domi,L. Draper,H. Dujmovic,K. Dutta,M. A. DuVernois,T. Ehrhardt,L. Eidenschink,A. Eimer,P. Eller,E. Ellinger,S. El Mentawi,D. Elsässer,R. Engel,H. Erpenbeck,J. Evans,P. A. Evenson,K. L. Fan,K. Fang,K. Farrag,A. R. Fazely,A. Fedynitch,N. Feigl,S. Fiedlschuster,C. Finley,L. Fischer,D. Fox,A. Franckowiak,P. Fürst,J. Gallagher,E. Ganster,A. Garcia,E. Genton,L. Gerhardt,A. Ghadimi,C. Girard-Carillo,C. Glaser,T. Glüsenkamp,J. G. Gonzalez,S. Goswami,A. Granados,D. Grant,S. J. Gray,O. Gries,S. Griffin,S. Griswold,K. M. Groth,C. Günther,P. Gutjahr,C. Ha,C. Haack,A. Hallgren,R. Halliday,L. Halve,F. Halzen,H. Hamdaoui,M. Ha Minh,M. Handt,K. Hanson,J. Hardin,A. A. Harnisch,P. Hatch,A. Haungs,J. Häußler,K. Helbing,J. Hellrung,J. Hermannsgabner,L. Heuermann,N. Heyer,S. Hickford,A. Hidvegi,C. Hill,G. C. Hill,K. D. Hoffman,S. Hori,K. Hoshina,M. Hostert,W. Hou,T. Huber,K. Hultqvist,M. Hünnefeld,R. Hussain,K. Hymon,A. Ishihara,W. Iwakiri,M. Jacquart,O. Janik,M. Jansson,G. S. Japaridze,M. Jeong,M. Jin,B. J. P. Jones,N. Kamp,D. Kang,W. Kang,X. Kang,A. Kappes,D. Kappesser,L. Kardum,T. Karg,M. Karl,A. Karle,A. Katil,U. Katz,M. Kauer,J. L. Kelley,M. Khanal,A. Khatee Zathul,A. Kheirandish,J. Kiryluk,S. R. Klein,A. Kochocki,R. Koirala,H. Kolanoski,T. Kontrimas,L. Köpke,C. Kopper,D. J. Koskinen,P. Koundal,M. Kovacevich,M. Kowalski,T. Kozynets,J. Krishnamoorthi,K. Kruiswijk,E. Krupczak,A. Kumar,E. Kun,N. Kurahashi,N. Lad,C. Lagunas Gualda,M. Lamoureux,M. J. Larson,S. Latseva,F. Lauber,J. P. Lazar,J. W. Lee,K. Leonard DeHolton,A. Leszczyńska,J. Liao,M. Lincetto,M. Liubarska,E. Lohfink,C. Love,C. J. Lozano Mariscal,L. Lu,F. Lucarelli,W. Luszczak,Y. Lyu,J. Madsen,E. Magnus,K. B. M. Mahn,Y. Makino,E. Manao,S. Mancina,W. Marie Sainte,I. C. Mariş,S. Marka,Z. Marka,M. Marsee,I. Martinez-Soler,R. Maruyama,F. Mayhew,T. McElroy,F. McNally,J. V. Mead,K. Meagher,S. Mechbal,A. Medina,M. Meier,Y. Merckx,L. Merten,J. Micallef,J. Mitchell,T. Montaruli,R. W. Moore,Y. Morii,R. Morse,M. Moulai,T. Mukherjee,R. Naab,R. Nagai,M. Nakos,U. Naumann,J. Necker,A. Negi,M. Neumann,H. Niederhausen,M. U. Nisa,A. Noell,A. Novikov,S. C. Nowicki,A. Obertacke Pollmann,V. O'Dell,B. Oeyen,A. Olivas,R. Orsoe,J. Osborn,E. O'Sullivan,H. Pandya,N. Park,G. K. Parker,E. N. Paudel,L. Paul,C. Pérez de los Heros,T. Pernice,J. Peterson,S. Philippen,A. Pizzuto,M. Plum,A. Pontén,Y. Popovych,M. Prado Rodriguez,B. Pries,R. Procter-Murphy,G. T. Przybylski,C. Raab,J. Rack-Helleis,K. Rawlins,Z. Rechav,A. Rehman,P. Reichherzer,E. Resconi,S. Reusch,W. Rhode,B. Riedel,A. Rifaie,E. J. Roberts,S. Robertson,S. Rodan,G. Roellinghoff,M. Rongen,A. Rosted,C. Rott,T. Ruhe,L. Ruohan,D. Ryckbosch,I. Safa,J. Saffer,D. Salazar-Gallegos,P. Sampathkumar,A. Sandrock,M. Santander,S. Sarkar,S. Sarkar,J. Savelberg,P. Savina,P. Schaile,M. Schaufel,H. Schieler,S. Schindler,B. Schlüter,F. Schlüter,N. Schmeisser,T. Schmidt,J. Schneider,F. G. Schröder,L. Schumacher,S. Sclafani,D. Seckel,M. Seikh,M. Seo,S. Seunarine,P. Sevle Myhr,R. Shah,S. Shefali,N. Shimizu,M. Silva,B. Skrzypek,B. Smithers,R. Snihur,J. Soedingrekso,A. Søgaard,D. Soldin,P. Soldin,G. Sommani,C. Spannfellner,G. M. Spiczak,C. Spiering,M. Stamatikos,T. Stanev,T. Stezelberger,T. Stürwald,T. Stuttard,G. W. Sullivan,I. Taboada,S. Ter-Antonyan,A. Terliuk,M. Thiesmeyer,W. G. Thompson,J. Thwaites,S. Tilav,K. Tollefson,C. Tönnis,S. Toscano,D. Tosi,A. Trettin,R. Turcotte,J. P. Twagirayezu,M. A. Unland Elorrieta,A. K. Upadhyay,K. Upshaw,A. Vaidyanathan,N. Valtonen-Mattila,J. Vandenbroucke,N. van Eijndhoven,D. Vannerom,J. van Santen,J. Vara,J. Veitch-Michaelis,M. Venugopal,M. Vereecken,S. Verpoest,D. Veske,A. Vijai,C. Walck,A. Wang,C. Weaver,P. Weigel,A. Weindl,J. Weldert,A. Y. Wen,C. Wendt,J. Werthebach,M. Weyrauch,N. Whitehorn,C. H. Wiebusch,D. R. Williams,L. Witthaus,A. Wolf,M. Wolf,G. Wrede,X. W. Xu,J. P. Yanez,E. Yildizci,S. Yoshida,R. Young,S. Yu,T. Yuan,Z. Zhang,P. Zhelnin,P. Zilberman,M. Zimmerman
arxiv（2024）
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摘要
A measurement of the diffuse astrophysical neutrino spectrum is presented
using IceCube data collected from 2011-2022 (10.3 years). We developed novel
detection techniques to search for events with a contained vertex and exiting
track induced by muon neutrinos undergoing a charged-current interaction.
Searching for these starting track events allows us to not only more
effectively reject atmospheric muons but also atmospheric neutrino backgrounds
in the southern sky, opening a new window to the sub-100 TeV astrophysical
neutrino sky. The event selection is constructed using a dynamic starting track
veto and machine learning algorithms. We use this data to measure the
astrophysical diffuse flux as a single power law flux (SPL) with a best-fit
spectral index of γ = 2.58 ^+0.10_-0.09 and per-flavor normalization
of ϕ^Astro_per-flavor = 1.68 ^+0.19_-0.22×
10^-18×GeV^-1cm^-2s^-1sr^-1 (at 100 TeV). The sensitive energy range for this dataset is
3 - 550 TeV under the SPL assumption. This data was also used to measure the
flux under a broken power law, however we did not find any evidence of a low
energy cutoff.
