We show that if the evolution of cosmic ray sources follows that of active galactic nuclei, the upper limit on the diffuse flux of tau neutrinos from the Pierre Auger Observatory marginally constrains the proton fraction at the end of the energy spectrum. We also discuss prospects to uncover new physics leptophobic interactions using future Auger data.

Juan Manuel Figueira∗,a for the Pierre Auger Collaborationb aInstituto de Tecnologías en Detección y Astropartículas (CNEA, CONICET, UNSAM), Centro Atómico Constituyentes, Comisión Nacional de Energía Atómica, Av. General Paz 1499 (B1650KNA) San Martín, Buenos Aires, Argentina. bObservatorio Pierre Auger, Av. San Martín Norte 304, 5613 Malargüe, Argentina. E-mail: [email protected] F...

We report theoretical and experimental study on Auger decay of excitons in Cu2O in a wide range of temperatures, from 2 Kelvin to 325 Kelvin, in single-photon surface excitation. We find that the Auger constant linearly increases with temperature above 100 Kelvin. This constant is important for experiments on Bose condensation of excitons.

We present SIMION 8.1 Monte Carlo type simulations of the response function and detection solid angle for long lived Auger states (lifetime τ ∼ 10(-9) - 10(-5) s) recorded by a hemispherical spectrograph with injection lens and position sensitive detector used for high resolution Auger spectroscopy of ion beams. Also included in these simulations for the first time are kinematic effects particu...

An improved design of the buffalo gun, incorporating hole drilling and shooting into one operation with almost total blast containment, provided nearly 50 percent more recordable seismic signal than the traditional buffalo gun. The ‘auger gun’ is designed to optimize field efficiency, source couple, and safety. The auger gun consists of three main parts: power source, auger/screw, and modified ...

We investigate the production of Si 2p Auger electrons during bombardment of Si surfaces by 1.0-5.1 keV Ar+ ions. Yields of Auger electrons emitted at 146 a with respect to the ion beam are measured as a function of ion energy. We observe a threshold of 3.8 keV for formation of a double L vacancy in Si, which is due to Ar-Si collisions. This value is higher than those of previous studies, which...

Intense X-ray free-electron lasers (XFELs) can rapidly excite matter, leaving it in inherently unstable states that decay on femtosecond timescales. As the relaxation occurs primarily via Auger emission, excited state observations are constrained by decay. In situ measurement of this process is therefore crucial, yet has thus far remained elusive at XFELs due to inherent timing and phase jitter...