skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Calculation of atmospheric neutrino flux using the interaction model calibrated with atmospheric muon data

Abstract

Using the 'modified DPMJET-III' model explained in the previous paper [T. Sanuki et al., preceding Article, Phys. Rev. D 75, 043005 (2007).], we calculate the atmospheric neutrino flux. The calculation scheme is almost the same as HKKM04 [M. Honda, T. Kajita, K. Kasahara, and S. Midorikawa, Phys. Rev. D 70, 043008 (2004).], but the usage of the 'virtual detector' is improved to reduce the error due to it. Then we study the uncertainty of the calculated atmospheric neutrino flux summarizing the uncertainties of individual components of the simulation. The uncertainty of K-production in the interaction model is estimated using other interaction models: FLUKA'97 and FRITIOF 7.02, and modifying them so that they also reproduce the atmospheric muon flux data correctly. The uncertainties of the flux ratio and zenith angle dependence of the atmospheric neutrino flux are also studied.

Authors:
; ; ; ;
Publication Date:
OSTI Identifier:
21011038
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 75; Journal Issue: 4; Other Information: DOI: 10.1103/PhysRevD.75.043006; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; COMPUTERIZED SIMULATION; ERRORS; F CODES; H CODES; KAONS; MUONS; NEUTRINOS; PARTICLE PRODUCTION

Citation Formats

Honda, M., Kajita, T., Kasahara, K., Midorikawa, S., and Sanuki, T. Calculation of atmospheric neutrino flux using the interaction model calibrated with atmospheric muon data. United States: N. p., 2007. Web. doi:10.1103/PHYSREVD.75.043006.
Honda, M., Kajita, T., Kasahara, K., Midorikawa, S., & Sanuki, T. Calculation of atmospheric neutrino flux using the interaction model calibrated with atmospheric muon data. United States. doi:10.1103/PHYSREVD.75.043006.
Honda, M., Kajita, T., Kasahara, K., Midorikawa, S., and Sanuki, T. Thu . "Calculation of atmospheric neutrino flux using the interaction model calibrated with atmospheric muon data". United States. doi:10.1103/PHYSREVD.75.043006.
@article{osti_21011038,
title = {Calculation of atmospheric neutrino flux using the interaction model calibrated with atmospheric muon data},
author = {Honda, M. and Kajita, T. and Kasahara, K. and Midorikawa, S. and Sanuki, T},
abstractNote = {Using the 'modified DPMJET-III' model explained in the previous paper [T. Sanuki et al., preceding Article, Phys. Rev. D 75, 043005 (2007).], we calculate the atmospheric neutrino flux. The calculation scheme is almost the same as HKKM04 [M. Honda, T. Kajita, K. Kasahara, and S. Midorikawa, Phys. Rev. D 70, 043008 (2004).], but the usage of the 'virtual detector' is improved to reduce the error due to it. Then we study the uncertainty of the calculated atmospheric neutrino flux summarizing the uncertainties of individual components of the simulation. The uncertainty of K-production in the interaction model is estimated using other interaction models: FLUKA'97 and FRITIOF 7.02, and modifying them so that they also reproduce the atmospheric muon flux data correctly. The uncertainties of the flux ratio and zenith angle dependence of the atmospheric neutrino flux are also studied.},
doi = {10.1103/PHYSREVD.75.043006},
journal = {Physical Review. D, Particles Fields},
number = 4,
volume = 75,
place = {United States},
year = {Thu Feb 15 00:00:00 EST 2007},
month = {Thu Feb 15 00:00:00 EST 2007}
}
  • We present the calculation of the atmospheric neutrino fluxes with an interaction model named JAM, which is used in PHITS (Particle and Heavy-Ion Transport code System) [K. Niita et al., Radiation Measurements 41, 1080 (2006).]. The JAM interaction model agrees with the HARP experiment [H. Collaboration, Astropart. Phys. 30, 124 (2008).] a little better than DPMJET-III[S. Roesler, R. Engel, and J. Ranft, arXiv:hep-ph/0012252.]. After some modifications, it reproduces the muon flux below 1 GeV/c at balloon altitudes better than the modified DPMJET-III, which we used for the calculation of atmospheric neutrino flux in previous works [T. Sanuki, M. Honda, T.more » Kajita, K. Kasahara, and S. Midorikawa, Phys. Rev. D 75, 043005 (2007).][M. Honda, T. Kajita, K. Kasahara, S. Midorikawa, and T. Sanuki, Phys. Rev. D 75, 043006 (2007).]. Some improvements in the calculation of atmospheric neutrino flux are also reported.« less
  • We have studied the hadronic interaction for the calculation of the atmospheric neutrino flux by summarizing the accurately measured atmospheric muon flux data and comparing with simulations. We find the atmospheric muon and neutrino fluxes respond to errors in the {pi}-production of the hadronic interaction similarly, and compare the atmospheric muon flux calculated using the HKKM04 [M. Honda, T. Kajita, K. Kasahara, and S. Midorikawa, Phys. Rev. D 70, 043008 (2004).] code with experimental measurements. The {mu}{sup +}+{mu}{sup -} data show good agreement in the 1{approx}30 GeV/c range, but a large disagreement above 30 GeV/c. The {mu}{sup +}/{mu}{sup -} ratiomore » shows sizable differences at lower and higher momenta for opposite directions. As the disagreements are considered to be due to assumptions in the hadronic interaction model, we try to improve it phenomenologically based on the quark parton model. The improved interaction model reproduces the observed muon flux data well. The calculation of the atmospheric neutrino flux will be reported in the following paper [M. Honda et al., Phys. Rev. D 75, 043006 (2007).].« less
  • Neutrino interactions from a 7.7 kton yr exposure of the IMB-3 detector are analyzed. A total of 935 contained events radiating over {similar to}50 MeV of {hacek C}erenkov-equivalent energy and consistent with atmospheric neutrino interactions are identified. Of these, 610 have a single {hacek C}erenkov ring. Single-ring interactions are efficiently separated into those containing a showering particle (produced mainly by {nu}{sub {ital e}}) and those containing a nonshowering particle (produced mainly by {nu}{sub {mu}}). In the momentum range 100{lt}{ital p}{sub {ital e}}{lt}1500 MeV/{ital c} and 300{lt}{ital p}{sub {mu}}{lt}1500 MeV/{ital c}, the fraction of nonshowering events is 0.36{plus minus}0.02(stat){plus minus}0.02(syst). Basedmore » on detailed models of neutrino production and interaction, a fraction of 0.51{plus minus}0.01(stat){plus minus}0.05(syst) is expected. This deficit of nonshowering, or excess of showering, events relative to the total is supported by an independent analysis of muon decay signals. In the same sample 33{plus minus}2(stat)% of events are accompanied by one or more muon decays, while 43{plus minus}1(stat)% are expected. Further studies that could reduce systematic errors and discover the cause of these discrepancies are suggested.« less