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Title: Hadron Interaction Simulation in Atmospheric Neutrino Flux Calculations

Abstract

The aspects of hadron simulation affecting the calculation of unoscillated atmospheric neutrino fluxes is discussed. The method of simulating the atmospheric cascades is described. An evaluation of the errors on the atmospheric neutrino fluxes and various experimentally convenient ratios is presented. A new measurement of hadron production with the NA49 experiment at CERN is briefly reported.

Authors:
 [1]
  1. Department of Physics, University of Oxford, Denys Wilkinson Building, Keble Road, Oxford, UK, OX1 3RH (United Kingdom)
Publication Date:
OSTI Identifier:
21054990
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 896; Journal Issue: 1; Conference: Hadronic shower simulation workshop, Batavia, IL (United States), 6-8 Sep 2006; Other Information: DOI: 10.1063/1.2720465; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; CASCADE SHOWERS; CERN; COMPUTERIZED SIMULATION; COSMIC NEUTRINOS; ERRORS; EVALUATION; HADRONS; MULTIPARTICLE SPECTROMETERS; PARTICLE IDENTIFICATION; PARTICLE INTERACTIONS; PARTICLE PRODUCTION

Citation Formats

Barr, G. D.. Hadron Interaction Simulation in Atmospheric Neutrino Flux Calculations. United States: N. p., 2007. Web. doi:10.1063/1.2720465.
Barr, G. D.. Hadron Interaction Simulation in Atmospheric Neutrino Flux Calculations. United States. doi:10.1063/1.2720465.
Barr, G. D.. Mon . "Hadron Interaction Simulation in Atmospheric Neutrino Flux Calculations". United States. doi:10.1063/1.2720465.
@article{osti_21054990,
title = {Hadron Interaction Simulation in Atmospheric Neutrino Flux Calculations},
author = {Barr, G. D.},
abstractNote = {The aspects of hadron simulation affecting the calculation of unoscillated atmospheric neutrino fluxes is discussed. The method of simulating the atmospheric cascades is described. An evaluation of the errors on the atmospheric neutrino fluxes and various experimentally convenient ratios is presented. A new measurement of hadron production with the NA49 experiment at CERN is briefly reported.},
doi = {10.1063/1.2720465},
journal = {AIP Conference Proceedings},
number = 1,
volume = 896,
place = {United States},
year = {Mon Mar 19 00:00:00 EDT 2007},
month = {Mon Mar 19 00:00:00 EDT 2007}
}
  • 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 othermore » 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.« less
  • We compare several different calculations of the atmospheric neutrino flux in the energy range relevant for contained neutrino interactions, and we identify the major sources of difference among the calculations. We find nothing that would affect the predicted ratio of {nu}{sub {ital e}}/{nu}{sub {mu}}, which is nearly the same in all calculations. Significant differences in normalization arise primarily from different treatments of pion production by interactions of protons in the atmosphere. Different assumptions about the primary spectrum and treatments of the geomagnetic field are also of some importance. {copyright} {ital 1996 The American Physical Society.}
  • 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
  • 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
  • To apply the model for inelastic hadron/nucleus collisions to hadron cascade simulations, a modified method of treating the cascade is presented. This is based on the exclusive description of particle production processes. Applying the resulting cascade model to typical experimental situations, reasonable agreement with data is found.