P. N. Dong

TL;DR: In this article, the authors reported a measurement of the flux of cosmic rays with unprecedented precision and statistics using the Pierre Auger Observatory based on fluorescence observations in coincidence with at least one surface detector.

TL;DR: In this article, a new measurement of the inclusive forward-backward t{bar t} production asymmetry and its rapidity and mass dependence was presented, with data corresponding to an integrated luminosity of 5.3 fb{sup -1} of p{bar p} collisions at {radical}s = 1.96 TeV.

TL;DR: The Pierre Auger Observatory is a hybrid detector for ultra-high energy cosmic rays as discussed by the authors, which combines a surface array to measure secondary particles at ground level together with a fluorescence detector to measure the development of air showers in the atmosphere above the array.

TL;DR: In this article, a method is developed to search for air showers initiated by photons using data recorded by the surface detector of the Auger Observatory, based on observables sensitive to the longitudinal shower development, the signal risetime and the curvature of the shower front.