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- W2899694483 abstract "Cosmic rays enter the Earth’s atmosphere with energies up to 1020 eV, producing extended air showers, which contain up to billions of secondary particles thatcan be detected on the ground. Inside these showers, hadrons with large transversemomentum may be produced, which subsequently decay into muons, alsocarrying large transverse momentum. These muons separate from the showercore while traveling to the ground, producing lateral separations from the coreup to several hundred meters. Together with the dense muon core bundle, theyproduce distinctive double-track signatures in the IceCube Neutrino Observatory.The corresponding lateral separation distributions are a measure of theunderlying transverse momentum of hadrons, and therefore yield importantinformation on hadron production during the air shower development. In this work, the lateral separation of atmospheric muons, between 135mand approximately 450 m, is measured using three years of IceCube data, takenbetween May 2012 and May 2015. A dedicated Monte Carlo for the simulationof laterally separated muons from air showers is presented. This is used todevelop selection criteria in order to isolate the events of interest from IceCubedata. In addition, a specific double-track reconstruction is introduced, whichenables a precise measurement of the lateral separation and arrival directionof muons. Using existing energy estimation methods, which are optimized forthe reconstruction of this class of events, the first primary energy dependentanalysis of the lateral separation distribution of muons far from the shower coreis performed. After applying all selection criteria, 80951 events are left with an effectivelifetime of 960 days. The resulting lateral separation distributions are studiedwith emphasis on the angular arrival directions and the transverse momentumof muons, which is estimated based on Monte Carlo simulations. In addition,the sensitivity of laterally separated muons on the mass composition of cosmicray nuclei and the seasonal variations of the resulting muon fluxes over threeyears are studied. Finally, the prospects for a search of double-track signatures, produced byexotic particles in cosmic ray air showers, which are predicted by theoriesbeyond the standard model, are discussed. It is shown that, considering recentconstraints on existing theoretical models, such as supersymmetry, the expectedfluxes are below 10-3 events per year. Hence, it is concluded that the observation of exotic double-tracks from air showers, using existing neutrino telescopes, isnot feasible." @default.
- W2899694483 created "2018-11-16" @default.
- W2899694483 creator A5070202914 @default.
- W2899694483 date "2018-09-11" @default.
- W2899694483 modified "2023-09-24" @default.
- W2899694483 title "Laterally Separated Muons from Cosmic Ray Air Showers Measured with the ICECUBE Neutrino Observatory" @default.
- W2899694483 hasPublicationYear "2018" @default.
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