Cosmic ray antiprotons from nearby cosmic accelerators
نویسندگان
چکیده
منابع مشابه
Cosmic Ray Antiprotons
Interstellar (IS) cosmic rays consist mainly of protons with a smaller admixture of heavier nuclei. Antiprotons (p’s) occur at an abundance of 10 of p’s. These energetic particles, kinetic energy K > 10 MeV, are Galactic in origin, not to be confused with the much denser solar wind plasma, with much lower K. The relative element abundances in cosmic rays (CRs) indicate that CR primaries are ion...
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The PAMELA experiment is a satellite-borne apparatus designed to study charged particles, and especially antiparticles, in the cosmic radiation. The apparatus is mounted on the Resurs DK1 satellite which was launched on 15 June 2006. PAMELA has been traveling around the earth along an elliptical and semi-polar orbit for almost five years. It mainly consists of a permanent magnetic spectrometer,...
متن کاملTime Delays in Cosmic Ray Propagation
Cosmic Rays (CR) travel at speeds essentially indistinguishable from the speed of light. However whilst travelling through magnetic fields, both regular and turbulent, they are delayed behind the light since they are usually charged particles and their paths are not linear. Those delays can be so long that they are an impediment to correctly identifying sources which may be variable in time. Fu...
متن کاملCosmic–ray Antiprotons from Neutralino Annihilation in the Halo
We report the main results of a paper where recent data of low–energy cosmic–ray p̄ spectrum have been analyzed in terms of newly calculated fluxes for secondary antiprotons and for a possible contribution of an exotic signal due to neutralino annihilation in the galactic halo. We also present the results of a paper in which we have proved that a sizeable fraction of the supersymmetric neutralin...
متن کاملCosmic-ray antiprotons from neutralino annihilation into gluons.
We estimate the ux of cosmic-ray antiprotons expected from the annihilation of neutralinos in the galactic halo. The antiproton signal may ooer an important alternative detection scheme in the case that neutralino annihilation proceeds mainly to the two-gluon nal state.
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ژورنال
عنوان ژورنال: Astroparticle Physics
سال: 2015
ISSN: 0927-6505
DOI: 10.1016/j.astropartphys.2014.12.012