R U Abbasi
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Explore the profile of R U Abbasi including associated specialties, affiliations and a list of published articles.
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Recent Articles
1.
Abbasi R, Abe Y, Abu-Zayyad T, Allen M, Arai Y, Arimura R, et al.
Phys Rev Lett
. 2024 Aug;
133(4):041001.
PMID: 39121414
We report an estimation of the injected mass composition of ultrahigh energy cosmic rays (UHECRs) at energies higher than 10 EeV. The composition is inferred from an energy-dependent sky distribution...
2.
Abbasi R, Allen M, Arimura R, Belz J, Bergman D, Blake S, et al.
Science
. 2023 Nov;
382(6673):903-907.
PMID: 37995237
Cosmic rays are energetic charged particles from extraterrestrial sources, with the highest-energy events thought to come from extragalactic sources. Their arrival is infrequent, so detection requires instruments with large collecting...
3.
Abbasi R, Abu-Zayyad T, Al-Seady M, Allen M, Amman J, Anderson R, et al.
Phys Rev Lett
. 2010 May;
104(16):161101.
PMID: 20482038
We report studies of ultrahigh-energy cosmic-ray composition via analysis of depth of air shower maximum (X(max)), for air shower events collected by the High-Resolution Fly's Eye (HiRes) observatory. The HiRes...
4.
Abbasi R, Abu-Zayyad T, Allen M, Amman J, Archbold G, Belov K, et al.
Phys Rev Lett
. 2008 Mar;
100(10):101101.
PMID: 18352170
The High Resolution Fly's Eye (HiRes) experiment has observed the Greisen-Zatsepin-Kuzmin suppression (called the GZK cutoff) with a statistical significance of five standard deviations. HiRes' measurement of the flux of...
5.
Abbasi R, Abu-Zayyad T, Amann J, Archbold G, Bellido J, Belov K, et al.
Phys Rev Lett
. 2004 Jun;
92(15):151101.
PMID: 15169276
We have measured the cosmic ray spectrum above 10(17.2) eV using the two air-fluorescence detectors of the High Resolution Fly's Eye observatory operating in monocular mode. We describe the detector,...