Dilyan Ivanov

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Air-fluorescence detectors such as the High Resolution Fly’s Eye (HiRes) detector are very sensitive to upwardgoing, Earth-skimming ultra-high-energy electron-neutrino-induced showers. This is due to the relatively large interaction cross sections of these high-energy neutrinos and to the Landau-Pomeranchuk-Migdal (LPM) effect. The LPM effect causes a(More)
Air-fluorescence detectors such as the High Resolution Fly’s Eye (HiRes) detector are very sensitive to upward-going, Earth-skimming ultrahigh energy electron-neutrino-induced showers. This is due to the relatively large interaction cross sections of these high-energy neutrinos and to the Landau-PomeranchukMigdal (LPM) effect. The LPM effect causes a(More)
Since 2007, the Telescope Array (TA) experiment, based in Utah, USA, has been observing ultra high energy cosmic rays to understand their origins. The experiment involves a surface detector (SD) array and three fluorescence detector (FD) stations. FD stations, installed surrounding the SD array, measure the air fluorescence light emitted from extensive air(More)
The ee pair production in collisions of muon with atoms is considered to all orders in the parameter Zα. We obtain energy distribution of e and e as well as energy loss of muon passing through matter with heavy atoms. The found corrections to the Born contribution do not depend on the details of the target properties except of a simple factor. For the(More)
Stereo data collected by the HiRes experiment over a six year period are examined for largescale anisotropy related to the inhomogeneous distribution of matter in the nearby Universe. We consider the generic case of small cosmic-ray deflections and a large number of sources tracing the matter distribution. In this matter tracer model the expected cosmic ray(More)
Although fast emerging and very perspective, the Light Emitting Diodes (LEDs) still need serious investigation in order to assure quality of lighting. There is a significant range of problems, introduced by the nature of their light generation principle. One of these problems is the introduction of temporal lighting artefacts (TLAs) – stroboscopic effect,(More)
For a quantum gas, being subject to continuous feedback of a macroscopic observable, the single-particle dynamics is studied. Despite feedback-induced particle correlations, it is shown that analytic solutions are obtained by formally extending the single-particle Hilbert space by an auxiliary degree of freedom. The particle's motion is then fed by colored(More)
Air-fluorescence detectors such as the High Resolution Fly’s Eye (HiRes) detector are very sensitive to upward-going, Earth-skimming ultrahigh energy electron-neutrino-induced showers. This is due to the relatively large interaction cross sections of these high-energy neutrinos and to the Landau-PomeranchukMigdal (LPM) effect. The LPM effect causes a(More)
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