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Cosmic ray spectrum and composition from PeV to EeV using 3 years of data from IceTop and IceCube
Univ Canterbury, Dept Phys & Astron, Private Bag 4800, Christchurch, New Zealand.
DESY, D-15738 Zeuthen, Germany.
Univ Canterbury, Dept Phys & Astron, Private Bag 4800, Christchurch, New Zealand.
Univ Libre Bruxelles, Sci Fac CP230, B-1050 Brussels, Belgium.
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2019 (English)In: Physical Review D: covering particles, fields, gravitation, and cosmology, ISSN 2470-0010, E-ISSN 2470-0029, Vol. 100, no 8, article id 082002Article in journal (Refereed) Published
Abstract [en]

We report on measurements of the all-particle cosmic ray energy spectrum and composition in the PeV to EeV energy range using 3 years of data from the IceCube Neutrino Observatory. The IceTop detector measures cosmic ray induced air showers on the surface of the ice, from which the energy spectrum of cosmic rays is determined by making additional assumptions about the mass composition. A separate measurement is performed when IceTop data are analyzed in coincidence with the high-energy muon energy loss information from the deep in-ice IceCube detector. In this measurement, both the spectrum and the mass composition of the primary cosmic rays are simultaneously reconstructed using a neural network trained on observables from both detectors. The performance and relative advantages of these two distinct analyses are discussed, including the systematic uncertainties and the dependence on the hadronic interaction models, and both all-particle spectra as well as individual spectra for elemental groups are presented.

Place, publisher, year, edition, pages
AMER PHYSICAL SOC , 2019. Vol. 100, no 8, article id 082002
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Subatomic Physics
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URN: urn:nbn:se:uu:diva-397044DOI: 10.1103/PhysRevD.100.082002ISI: 000491993600001OAI: oai:DiVA.org:uu-397044DiVA, id: diva2:1371224
Available from: 2019-11-19 Created: 2019-11-19 Last updated: 2019-11-19Bibliographically approved

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Botner, OlgaBurgman, AlexanderHallgren, AllanPérez de los Heros, Carlos

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High Energy PhysicsDepartment of Physics and Astronomy
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