Results 41 to 50 of about 307,132 (186)
Solution Of Wheeler-De Witt Equation, Potential Well And Tunnel Effect
, 2007 This paper uses the relation of the cosmic scale factor and scalar field to solve Wheeler-DeWitt equation, gives the tunnel effect of the cosmic scale factor a and quantum potential well of scalar field, and makes it fit with the physics of cosmic ...
A. Linde +9 more
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Energy composition of the Universe: time-independent internal symmetry
, 2005 The energy composition of the Universe, as emerged from the Type Ia supernova observations and the WMAP data, looks preposterously complex, -- but only at the first glance. In fact, its structure proves to be simple and regular.
A. Golfand Yu +28 more
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Ultra-high energy cosmic neutrinos [PDF]
, 2000 Several cosmologically distant astrophysical sources may produce ultra-high energy cosmic neutrinos (E > 10^6 GeV) of all flavors above the atmospheric neutrino background. I study the effects of vacuum neutrino flavor mixing on this cosmic neutrino flux.
Athar, H.
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On the Origin of High-Energy Cosmic Neutrinos
, 2014 Recently, the IceCube collaboration made a big announcement of the first discovery of high-energy cosmic neutrinos. Their origin is a new interesting mystery in astroparticle physics.
Murase, Kohta
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Radiation Exposure in the Lower Atmosphere during Different Periods of Solar Activity
Atmosphere, 2022 In recent years, there has been a huge increase in air travel, both for business and leisure. For this reason, entities such as the European Commission and the International Committee on Radiological Protection have provided several recommendations for ...
Anastasia Tezari +9 more
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Physics of Cosmic Masers [PDF]
Symposium - International Astronomical Union, 1988 Natural masers, which emit powerful narrow-band radiation in molecular microwave lines, were discovered about 20 years ago. They draw the astrophysicist's attention in two ways: 1) as a unique physical phenomenon and 2) as very informative probes of physical conditions in those astrophysical objects (very young and very old stars) with which they are ...
openaire +1 more source
Neutrinos And Big Bang Nucleosynthesis [PDF]
, 2012 According to the standard models of particle physics and cosmology, there should be a background of cosmic neutrinos in the present Universe, similar to the cosmic microwave photon background.
Steigman, Gary
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Boosted Tau Lepton as a Microscope and Macroscope
Advances in High Energy Physics, 2022 Anomalies from the LHCb lepton flavour universality and Fermilab muon anomalous magnetic moment show tantalizing hints of possible new physics from the lepton sectors.
Sitian Qian +11 more
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Particle physics in cosmic rays [PDF]
International Journal of Modern Physics A, 2021 The Pierre Auger Observatory is the world’s largest detector of ultra-high energy cosmic rays (UHECRs). It uses an array of fluorescence telescopes and particle detectors at the ground to obtain detailed measurements of the energy spectrum, mass composition and arrival directions of primary cosmic rays (above the energy of [Formula: see text] eV) with
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Cosmic particles with energies above 10^19 eV: a brief review of results
, 2013 Experimental results on ultra-high-energy cosmic rays are briefly reviewed and their interpretation is discussed. The results related to principal observables (arrival directions, energies and composition) of primary particles of extended air showers as ...
Troitsky, Sergey
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