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      Ultra high energy cosmic rays and possible signature of black strings

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          Abstract

          Ultra high energy cosmic rays (UHECRs) probably originate in extreme conditions in which extra dimension effects might be important. In this paper we calculate the correction in black hole accretion mechanisms due to extra dimension effects in the static and rotating cases. A parametrization of the external Kerr horizons in both cases is presented and analysed. We use previous calculations of upper limits on the UHECR flux to set limits on the UHECR production efficiency of nine sources. The upper limit on the UHECR luminosity calculation is based on GeV-TeV gamma-ray measurements. The total luminosity due to the accretion mechanism is compared to the upper limit on UHECRs. The dependence of the UHECR production efficiency upper limit on black hole mass is also presented and discussed

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          Journal
          2015-10-16
          2016-03-14
          10.1088/1475-7516/2016/03/014
          1510.04992

          http://arxiv.org/licenses/nonexclusive-distrib/1.0/

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          Journal of Cosmology and Astroparticle Physics JCAP03(2016)014
          16 pages, 5 figures
          hep-th astro-ph.HE hep-ph

          High energy & Particle physics, High energy astrophysical phenomena

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