scholarly journals THE MASS COMPOSITION OF ULTRA HIGH ENERGY COSMIC RAYS

2013 ◽  
Vol 53 (A) ◽  
pp. 698-702
Author(s):  
Aurelio F. Grillo
Keyword(s):  
Cosmic Rays ◽  
Particle Physics ◽  
High Energy ◽  
Pierre Auger Observatory ◽  
Mass Composition ◽  
Ultra High Energy ◽  
Fluorescence Detector ◽  
High Energy Cosmic Rays ◽  
The Status ◽  
Composition Measurements

The status of the Mass Composition measurements of Ultra High Energy Cosmic Rays is presented, with emphasis on the results from the Fluorescence Detector of the Pierre Auger Observatory. Possible consequences of the present measurements are discussed, both on the particle physics and astrophysics aspects.

ULTRA HIGH ENERGY COSMIC RAYS WITH THE PIERRE AUGER OBSERVATORY

2012 ◽  
Vol 18 ◽  
pp. 221-229
Author(s):  
◽  
J. R. T. DE MELLO NETO
Keyword(s):  
Energy Spectrum ◽  
Cosmic Rays ◽  
Cross Section ◽  
High Energy ◽  
Pierre Auger Observatory ◽  
Mass Composition ◽  
Ultra High Energy ◽  
High Energy Cosmic Rays ◽  
The Status ◽  
Shower Maximum

We present the status and the recent measurements from the Pierre Auger Observatory. The energy spectrum is described and its features discussed. We report searches for anisotropy of cosmic rays arrival directions in large scales and through correlation with catalogues of celestial objects. The measurement of the cross section proton-air is discussed. Finally, the mass composition is addressed with the measurements of the variation of the depth of shower maximum with energy and with the muon density at ground.

RESULTS FROM THE TELESCOPE ARRAY EXPERIMENT

2010 ◽  
Vol 19 (08n10) ◽  
pp. 1275-1283
Author(s):  
◽  
H. SAGAWA
Keyword(s):  
Cosmic Rays ◽  
High Energy ◽  
Mass Composition ◽  
Ultra High Energy ◽  
Arrival Direction ◽  
Data Set ◽  
Telescope Array ◽  
High Energy Cosmic Rays ◽  
The Status ◽  
Hybrid Detector

The Telescope Array (TA) is the largest hybrid detector in the northern hemisphere, which consists of an array of surface detectors (SD) and fluorescence detectors (FD), to explore the origin of ultra-high energy cosmic rays (UHECR) by measuring energy, arrival direction, mass composition, and other characteristics of UHECRs. Here we present the status and preliminary results based on the first data set of the experiment.

scholarly journals Mass composition of cosmic rays with energies from [1017.2]eV to [1020]eV using surface and fluorescence detectors of the Pierre Auger Observatory

2018 ◽  
Vol 191 ◽  
pp. 08008
Author(s):  
Gašper Kukec Mezek
Keyword(s):  
Cosmic Rays ◽  
Data Interpretation ◽  
High Energy ◽  
Pierre Auger Observatory ◽  
Mass Composition ◽  
Ultra High Energy ◽  
Air Showers ◽  
High Energy Cosmic Rays ◽  
Full Dataset ◽  
Hybrid Detection

Ultra-high-energy cosmic rays (UHECRs) are highly energetic particles with []EeV energies, exceeding the capabilities of man-made colliders. They hold information on extreme astrophysical processes that create them and the medium they traverse on their way towards Earth. However, their mass composition at such energies is still unclear, because data interpretation depends on our choice of high energy hadronic interaction models. With its hybrid detection method, the Pierre Auger Observatory has the possibility to detect extensive air showers with an array of surface water-Cherenkov stations (SD) and fluorescence telescopes (FD). We present recent mass composition results from the Pierre Auger Collaboration using observational parameters from SD and FD measurements. Using the full dataset of the Pierre Auger Observatory, implications on composition can be made for energies above [1017.2]eV.

scholarly journals General overview of recent results from the Pierre Auger Observatory

2011 ◽  
Vol 7 (4) ◽  
pp. 445-451 ◽  
Author(s):  
R. Caruso on beh. of the P. Auger Collaboration
Keyword(s):  
Energy Spectrum ◽  
Cosmic Rays ◽  
High Energy ◽  
Particle Energy ◽  
Elongation Rate ◽  
Pierre Auger Observatory ◽  
Mass Composition ◽  
Ultra High Energy ◽  
High Energy Cosmic Rays ◽  
Scientific Results

Since June 2008 the Pierre Auger Observatory, designed for the research of ultra high energy cosmic rays, is taking data in its final configuration. In this paper I will present a short overview of its recent scientific results. More specifically, I will discuss the all particle energy spectrum and the evidence for the GZK features, the measurement of the elongation rate and the resulting inferences on mass composition, the evidence for anisotropy in the subset of the highest energy events.

scholarly journals Highest energy particle physics with the Pierre Auger Observatory

2014 ◽  
Vol 31 ◽  
pp. 1460301
Author(s):  
Analisa Mariazzi ◽  
Keyword(s):  
Cosmic Rays ◽  
Particle Physics ◽  
Measurement Techniques ◽  
High Energy ◽  
Pierre Auger Observatory ◽  
Ultra High Energy ◽  
Air Showers ◽  
Hadronic Interactions ◽  
High Energy Cosmic Rays ◽  
Hybrid Detector

Astroparticles offer a new path for research in the field of particle physics, allowing investigations at energies above those accesible with accelerators. Ultra-high energy cosmic rays can be studied via the observation of the showers they generate in the atmosphere. The Pierre Auger Observatory is a hybrid detector for ultra-high energy cosmic rays, combining two complementary measurement techniques used by previous experiments, to get the best possible measurements of these air showers. Shower observations enable one to not only estimate the energy, direction and most probable mass of the primary cosmic particles but also to obtain some information about the properties of their hadronic interactions. Results that are most relevant in the context of determining hadronic interaction characteristics at ultra-high energies will be presented.

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