BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//CERN//INDICO//EN
BEGIN:VEVENT
SUMMARY:The comparison of  calculated atmospheric neutrino spectra with  m
 easurement data of IceCube and ANTARES experiments
DTSTART;VALUE=DATE-TIME:20161012T123000Z
DTEND;VALUE=DATE-TIME:20161012T130000Z
DTSTAMP;VALUE=DATE-TIME:20260713T093342Z
UID:indico-contribution-541@cern.ch
DESCRIPTION:Speakers: Anna Morozova (Moscow State U.)\, Sergei Sinegovsky 
 (Irkutsk State University\, Institute of Apliied Physics)\nThe processing 
 of the IceCube experiment data obtained during 988 days (2010–2014) reve
 aled 54 neutrino-induced events with deposited energies  20 TeV - 2 PeV [1
 ]. \nThe hypothesis of an astrophysical origin of these neutrinos is confi
 rmed at $5.7 \\sigma$ CL. To identify reliably the neutrino events a thoro
 ugh calculation of the atmospheric neutrino background should be performed
 . We calculate the atmospheric neutrino spectra in the energy range of 100
  GeV - 10 PeV using the set  of the hadronic models and several parametriz
 ations of cosmic ray spectra supported by experimental data. It is shown t
 hat rare decays of short-lived neutral kaons contribute close to one third
  of the atmospheric conventional electron neutrinos at the energies above 
 100 TeV. The account for kaons production in pion-nucleus collisions gives
  rise to increase the  $\\nu_{e}$  flux by 5–7% in the energy range of 1
 00 GeV – 100 TeV.  The detailed comparison of our calculations  performe
 d with use of $Z(E\,h)$ -functions  approach [2]\, with those of  MCEq  me
 thod  by A.Fedynitch et al. [3]\, shows the consistency on the whole  at l
 east in the energy range 100 GeV – 1 PeV.  Calculated neutrino spectra a
 gree rather well  with the measurement data of  the experiments  IceCube  
 [4\,5]  and   ANTARES [6]. Uncertainties of the measurement data above 400
  TeV leave  a window for  the the QGSM  prompt neutrino component [2].\n\n
 [1] Aartsen M.G. et al. (IceCube Collaboration). Evidence for high-energy 
 extraterrestrial neutrinos at the IceCube detector // Science  2013. V. 34
 2\, 1242856\; Phys. Rev. Lett. 113\, 101101 (2014)\; arXiv:1510.05223. \n\
 n[2] Sinegovskaya T.S\, Morozova A.D.\, Sinegovsky S.I. High-energy neutri
 nos fluxes and flavor ratio in the Earth’s atmosphere.  Phys. Rev. D. 20
 15. V. 91\, 063011.\n\n[3] Fedynitch A. et al. Calculation of conventional
  and prompt lepton fluxes at very high energy\,  EPJ Web Conf. 2015. V. 99
 \, 08001\; arXiv:1503.00544.\; Fedynitch A. et al. MCEQ - numerical code f
 or inclusive lepton flux calculations.  PoS (ICRC2015) 1129\; http://githu
 b.com/afedynitch/MCEq/.\n\n[4] Aartsen M.G. et al. (IceCube Collaboration)
 . Development of a general analysis and unfolding scheme and its applicati
 on to measure the energy spectrum of atmospheric neutrinos with IceCube.  
 Eur. Phys. J. C. 2015. V. 75\, 116.\n\n[5] Aartsen M.G. et al. (IceCube Co
 llaboration). Measurement of the atmospheric νe spectrum  with IceCube. P
 hys. Rev. D. 2015. V. 91\, 122004.\n\n[6] Adrian-Martinez S. et al. Measur
 ement of the atmospheric   muon neutrino   energy spectrum from 100 GeV to
  200 TeV with the ANTARES telescope.  Eur. Phys. J. C. 2013. V.73\, 2606.\
 n\nhttps://indico.particle.mephi.ru/event/4/contributions/541/
LOCATION:Milan Hotel Hall of the 2nd floor
URL:https://indico.particle.mephi.ru/event/4/contributions/541/
END:VEVENT
END:VCALENDAR