Results 91 to 100 of about 260,461 (223)
Cosmologically safe QCD axion as a present from extra dimension
Physics Letters B, 2015 We propose a QCD axion model where the origin of PQ symmetry and suppression of axion isocurvature perturbations are explained by introducing an extra dimension. Each extra quark–antiquark pair lives on branes separately to suppress PQ breaking operators.
Masahiro Kawasaki +2 more
doaj +1 more source
, 2009 Cosmic rays produced or deposited at sites in hot cluster gas are thought to provide the pressure that forms X-ray cavities. While cavities have a net cooling effect on cluster gas, young, expanding cavities drive shocks that increase the local entropy ...
Mathews, William G.
core +1 more source
Journal of Physics G: Nuclear and Particle Physics, 2005 Searching for strangelets in cosmic rays may be the best way to test the possible stability of strange quark matter. I review calculations of the astrophysical strangelet flux in the GV--TV rigidity range, which will be investigated from the Alpha Magnetic Spectrometer (AMS-02) on the International Space Station, and discuss the merits of strangelets ...
openaire +4 more sources
Elastic scattering in geometrical model
Physics Letters B, 2016 The experimental data on proton–proton elastic and inelastic scattering emerging from the measurements at the Large Hadron Collider, calls for an efficient model to fit the data.
Zbigniew Plebaniak, Tadeusz Wibig
doaj +1 more source
TeV cosmic-ray proton and helium spectra in the myriad model II
, 2014 Recent observations show that the cosmic ray nuclei spectra start to harden above 100 GeV, in contradiction with the conventional steady-state cosmic ray model.
Chen, Xuelei, Liu, Wei, Salati, Pierre
core +3 more sources
Space Weather Effects on Heart Rate Variations: Sex Dependence
AtmosphereThe effects of solar activity and the accompanying space weather events on human pathological conditions, physiological parameters and other psycho-physiological disturbances have been analyzed in numerous recent investigations.
Maria-Christina Papailiou +1 more
doaj +1 more source
Surveys in Geophysics, 2007 Among the most puzzling questions in climate change is that of solar-climate variability, which has attracted the attention of scientists for more than two centuries. Until recently, even the existence of solar-climate variability has been controversial - perhaps because the observations had largely involved temporary correlations between climate and ...
openaire +4 more sources
Research on rapid imaging with cosmic ray muon scattering tomography. [PDF]
Sci Rep, 2023 Wen QG.
europepmc +1 more source
Highlight Talk from Super-Kamiokande
Universe, 2019 Super-Kamiokande (SK), a 50 kton water Cherenkov detector in Japan, is observing both atmospheric and solar neutrinos. It is also searching for supernova (relic) neutrinos, proton decays and dark matter-like particles. A three-flavor oscillation analysis
Yuuki Nakano +1 more
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Astroparticle Physics, 2013 This review describes the basic theory of cosmic ray acceleration by shocks including the plasma instabilities confining cosmic rays near the shock, the effect of the magnetic field orientation, the maximum cosmic ray energy and the shape of the cosmic ray spectrum.
openaire +3 more sources