An alternative method to finding patterns in HiRes stereo data

Abbasi, Rasha; Abu‐Zayyad, T.; Amman, J. F.; Archbold, G.; Belov, K.; Blake, Samuel; Belz, J. W.; BenZvi, S.; Bergman, D. R.; Boyer, J.; Burt, G. W.; Cao, Z.; Connolly, B.; Deng, Wei-Tian; Fedorova, Y.; Findlay, Joseph R.; Finley, C.; Gray, R.; Hanlon, W.; Hoffman, C. M.; Holzscheiter, M. H.; Hughes, G.; Hüntemeyer, P.; Jones, B.F.; Jui, C.; Kim, K.; Kirn, M.; Knapp, B.; Loh, E. C.; Maestas, M. M.; Manago, Naohiro; Mannel, E.; Marek, Lukáš; Martins, Kennedy A.; Matthews, John; Matthews, J. N.; Moore, Sheva; O'Neill, Aaron Paul; Painter, C. A.; Perera, L.; Reil, K.; Riehle, R.; Roberts, M.; Rodriguez, D.; Sasaki, M.; Schnetzer, S.; Scott, L. M.; Seman, M.; Sinnis, G.; Smith, J. D.; Sokolsky, P.; Song, C.; Springer, R. W.; Stokes, B. T.; Thomas, J. R.; Thomas, S. B.; Thomson, G. B.; Tupa, D.; Westerhoff, S.; Weincke, Lawrence; Zech, A.; Zhang, X.

doi:10.1016/j.astropartphys.2007.08.005

Cited by 20 publications

(32 citation statements)

References 4 publications

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“…groups (see e.g. [150]) similar to what is done for surface detectors. In the following, however, we will concentrate on the first two moments of the X max -distribution, X max and σ(X max ).…”

Section: Fluorescence Telescopesmentioning

confidence: 95%

Measurements of the cosmic ray composition with air shower experiments

Kampert

Unger

2012

Astroparticle Physics

432

434

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In this paper we review air shower data related to the mass composition of cosmic rays above 10 15 eV. After explaining the basic relations between air shower observables and the primary mass and energy of cosmic rays, we present different approaches and results of composition studies with surface detectors. Furthermore, we discuss measurements of the longitudinal development of air showers from non-imaging Cherenkov detectors and fluorescence telescopes.The interpretation of these experimental results in terms of primary mass is highly susceptible to the theoretical uncertainties of hadronic interactions in air showers. We nevertheless attempt to calculate the logarithmic mass from the data using different hadronic interaction models and to study its energy dependence from 10 15 eV to 10 20 eV.

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Section: Fluorescence Telescopesmentioning

confidence: 95%

Measurements of the cosmic ray composition with air shower experiments

Kampert

Unger

2012

Astroparticle Physics

432

434

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“…Left: three-population model of the cosmic-ray spectrum from Eq. 21 compared to data[12][13][14][15][16][17][18][19][20][21][22]. The extra-galactic population in this model has a mixed composition.…”

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confidence: 95%

Spectrum of cosmic-ray nucleons, kaon production, and the atmospheric muon charge ratio

Gaisser

2012

Astroparticle Physics

354

482

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Interpretation of measurements of the muon charge ratio in the TeV range depends on the spectra of protons and neutrons in the primary cosmic radiation and on the inclusive cross sections for production of π ± and K ± in the atmosphere. Recent measurements of the spectra of cosmic-ray nuclei are used here to estimate separately the energy spectra of protons and neutrons and hence to calculate the charge separated hadronic cascade in the atmosphere. From the corresponding production spectra of µ + and µ − the µ + /µ − ratio is calculated and compared to recent measurements. The comparison leads to a determination of the relative contribution of kaons and pions. Implications for the spectra of ν µ andν µ are discussed.

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“…Fig. 5 demonstrates how the HiRes collaboration found E 1/2 from observational data [44]. The ratio of the measured integral spectrum J(> E) and the low-energy power-law approximation KE −γ was plotted as a function of energy.…”

Section: Gzk Cutoff In Hires and Telescope Array Datamentioning

confidence: 96%

UHECR: Signatures and models

Berezinsky

2013

EPJ Web of Conferences

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Abstract. The signatures of Ultra High Energy (E 1 EeV) proton propagation through CMB radiation are pair-production dip and GZK cutoff. The visible characteristics of these two spectral features are ankle, which is intrinsic part of the dip, beginning of GZK cutoff in the differential spectrum and E 1/2 in integral spectrum. Measured by HiRes and Telescope Array (TA) these characteristics agree with theoretical predictions. However, directly measured mass composition remains a puzzle. While HiRes and TA detectors observe the proton-dominated mass composition, the data of Auger detector strongly evidence for nuclei mass composition becoming progressively heavier at energy higher than 4 EeV and reaching Iron at energy about 35 EeV. The models based on the Auger and HiRes/TA data are considered independently and classified using the transition from galactic to extragalactic cosmic rays. The ankle cannot provide this transition. since data of all three detector at energy (1-3) EeV agree with pure proton composition (or at least not heavier than Helium). If produced in Galaxy these particles result in too high anisotropy. This argument excludes or strongly disfavours all ankle models with ankle energy E a > 3 EeV. The calculation of elongation curves, X max (E), for different ankle models strengthens further this conclusion. Status of other models, the dip, mixed composition and Auger based models are discussed.

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An alternative method to finding patterns in HiRes stereo data

Cited by 20 publications

References 4 publications

Measurements of the cosmic ray composition with air shower experiments

Measurements of the cosmic ray composition with air shower experiments

Spectrum of cosmic-ray nucleons, kaon production, and the atmospheric muon charge ratio

UHECR: Signatures and models

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