Measurement of the Atmospheric Muon Spectrum from 20 to 2000 Gev
نویسنده
چکیده
The atmospheric muon spectrum between 20 and 2000 GeV was measured with the L3 magnetic muon spectrometer for zenith angles ranging from 0 to 58 degrees. Due to the large data set and the good detector resolution, a precision of 2.6% at 100 GeV was achieved for the absolute normalization of the vertical muon flux. The momentum dependence of the ratio of positive to negative muons was obtained between 20 and 630 GeV.
منابع مشابه
Muons in IceCube
The IceCube detector allows for the first time a measurement of atmospheric muon and neutrino energy spectra from tens of GeV up to the PeV range. The lepton flux in the highest energy region depends on both the primary cosmic ray composition around the “knee” and the contribution from prompt decays of mostly charmed hadrons produced in air showers. It is demonstrated here that a direct measure...
متن کاملAtmospheric neutrino challenges
In 2004, after the experimental statistics on atmospheric neutrinos has become so good, one the major obstacles to the exact determination of the oscillation parameters is the uncertainty in the predictions of the atmospheric neutrino flux. The predictions are not bad, we qualitatively understand well all features of the neutrino flux, but reaching the necessary 5% or better level is still impo...
متن کاملThe energy spectrum of atmospheric neutrinos between 2 and 200 TeV with the AMANDA-II detector
The muon and anti-muon neutrino energy spectrum is determined from 2000–2003 AMANDA telescope data using regularised unfolding. This is the first measurement of atmospheric neutrinos in the energy range 2–200 TeV. The result is compared to different atmospheric neutrino models and it is compatible with the atmospheric neutrinos from pion and kaon decays. No significant contribution from charm h...
متن کاملFe b 20 01 Investigations of fast neutron production by 190 GeV / c muon interactions on graphite target
The production of fast neutrons (1 MeV 1 GeV) in high energy muon-nucleus interactions is poorly understood, yet it is fundamental to the understanding of the background in many underground experiments. The aim of the present experiment (CERN NA55) was to measure spallation neutrons produced by 190 GeV/c muons scattering on carbon target. We have investigated the energy spectrum and angular dis...
متن کاملA Compilation of High Energy Atmospheric Muon Data at Sea Level
We collect and combine all published data on the vertical atmospheric muon flux and the muon charge ratio for muon momenta above 10 GeV. At sea level the world average of the momentum spectra agrees with the flux calculated by E.V. Bugaev et al. within 15 %. The observed shape of the differential flux versus momentum is slightly flatter than predicted in this calculation. The experimental accur...
متن کامل