Evidence for Changing of Cosmic Ray Composition between<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mn>10</mml:mn></mml:mrow><mml:mrow><mml:mn>17</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mn>10</mml:mn></mml:mrow><mml:mrow><mml:mn>18</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math>eV from Multicomponent Measurements

Abu‐Zayyad, T.; Belov, K.; Bird, D. J.; Boyer, J.; Cao, Zhen; Catanese, M.; Chen, G. F.; Clay, R. W.; Covault, C. E.; Cronin, J. W.; Dai, H. Y.; Dawson, B. R.; Elbert, J. W.; Fick, B.; Fortson, L.; Fowler, J. W.; Gibbs, K.; Glasmacher, M. A. K.; Green, K. D.; Ho, Y.; Huang, Audrey; Jui, C.; Kidd, M.; Kieda, D. B.; Knapp, B.; Ko, S.; Larsen, C. G.; Lee, W.; Loh, E. C.; Mannel, E.; Matthews, John; Matthews, J. N.; Newport, B. J.; Nitz, D.; Ong, R. A.; Simpson, K. M.; Smith, J. D.; Sinclair, D.; Sokolsky, P.; Sommers, P.; Song, C.; Tang, J. K. K.; Thomas, S. B.; Velde, J. C. van der; Wiencke, L.; Wilkinson, Christopher; Yoshida, Shigeru; Zhang, X. Z.

doi:10.1103/physrevlett.84.4276

Cited by 195 publications

(120 citation statements)

References 11 publications

Supporting

Mentioning

106

Contrasting

Order By: Relevance

“…From these lateral distributions, the muon density at 600 m is determined as a function of energy and compared in Fig. 14 higher energy from Hi-Res-MIA [19] in Fig. 14.…”

Section: Surface Muonsmentioning

confidence: 99%

Primary spectrum and composition with IceCube/IceTop

Gaisser

2016

Nuclear and Particle Physics Proceedings

View full text Add to dashboard Cite

IceCube, with its surface array IceTop, detects three different components of extensive air showers: the total signal at the surface, GeV muons in the periphery of the showers and TeV muons in the deep array of IceCube. The spectrum is measured with high resolution from the knee to the ankle with IceTop. Composition and spectrum are extracted from events seen in coincidence by the surface array and the deep array of IceCube. The muon lateral distribution at the surface is obtained from the data and used to provide a measurement of the muon density at 600 meters from the shower core up to 30 PeV. Results are compared to measurements from other experiments to obtain an overview of the spectrum and composition over an extended range of energy. Consistency of the surface muon measurements with hadronic interaction models and with measurements at higher energy is discussed.

show abstract

“…From these lateral distributions, the muon density at 600 m is determined as a function of energy and compared in Fig. 14 higher energy from Hi-Res-MIA [19] in Fig. 14.…”

Section: Surface Muonsmentioning

confidence: 99%

Primary spectrum and composition with IceCube/IceTop

Gaisser

2016

Nuclear and Particle Physics Proceedings

View full text Add to dashboard Cite

show abstract

“…We use the extragalactic propagation model of Berezinsky, Gazizov, and Grigorieva [27], modified to take account of discrete energy losses of protons as in the paper by Blanton, Blasi and Olinto [28], and assume that protons come from sources distributed uniformly following the expansion of the universe, and lose energy by pion and e + e − production from the cosmic microwave background radiation, as well as from the expansion of the universe. Since the measured composition [29,30] changes from heavy to light within our energy range, we approximate the galactic component of cosmic rays as being the fraction of iron. We take this fraction to be 55% at 10 17 eV, decreasing linearly with log E to 20% at 10 17 eV, then decreasing to zero at 10 20 eV.…”

Section: Discussionmentioning

confidence: 99%

Monocular measurement of the spectrum of UHE cosmic rays by the FADC detector of the HiRes experiment

Abbasi¹,

Abu‐Zayyad²,

Amman³

et al. 2005

Astroparticle Physics

Self Cite

102

View full text Add to dashboard Cite

We have measured the spectrum of UHE cosmic rays using the Flash ADC (FADC) detector (called HiRes-II) of the High Resolution Fly's Eye experiment running in monocular mode. We describe in detail the data analysis, development of the Monte Carlo simulation program, and results. We also describe the results of the HiRes-I detector. We present our measured spectra and compare them with a model incorporating galactic and extragalactic cosmic rays. Our combined spectra provide strong evidence for the existence of the spectral feature known as the "ankle."

show abstract

“…At the time of writing of this proceeding, none of the available hadronic generator models is able to comprehensively describe the high energy cosmic ray experimental observations at the ultra high energy range [12,13]. Tuning to accelerator data should lead to convergence of the model predictions.…”

Section: Introductionmentioning

confidence: 99%

\(\langle X_{\text{max}} \rangle \) Uncertainty from Extrapolation of Cosmic Ray Air Shower Parameters

Abbasi

Thomson

2018

Proceedings of 2016 International Conference on Ultra-High Energy Cosmic Rays (UHECR2016)

View full text Add to dashboard Cite

In this work we investigate the uncertainties in the prediction of the average shower maximum, < X max >, by the currently used high energy cosmic ray shower simulation models. Recent measurements at the LHC have provided constrains on some of the parameters in these models. However, uncertainties in the prediction of < X max > remain due to extrapolation from accelerator data up to center of mass of 250 TeV. The extrapolation in the elasticity, multiplicity, and p-p cross section from the LHC energy range to 3 × 10 19 eV in a cosmic ray's lab frame is investigated in this proceeding. Our calculation of the uncertainty in < X max > is approximately equal to the difference among the modern models being used in the field.

show abstract

Evidence for Changing of Cosmic Ray Composition between1017and1018eV from Multicomponent Measurements

Cited by 195 publications

References 11 publications

Primary spectrum and composition with IceCube/IceTop

Primary spectrum and composition with IceCube/IceTop

Monocular measurement of the spectrum of UHE cosmic rays by the FADC detector of the HiRes experiment

\(\langle X_{\text{max}} \rangle \) Uncertainty from Extrapolation of Cosmic Ray Air Shower Parameters

Contact Info

Product

Resources

About