Astronomy and Astrophysics – Astrophysics – High Energy Astrophysical Phenomena
Scientific paper
2009-06-15
Astronomy and Astrophysics
Astrophysics
High Energy Astrophysical Phenomena
Conference Proceedings of ICRC 2009
Scientific paper
Large surface detectors might be sensitive not only with respect to extensive air showers induced by ultra high energy neutrinos but also to showers induced by hypothetical objects like microscopic black-holes. Microscopic black-holes might be produced in high energy particle collisions with the center of mass energies above the fundamental scale of gravity. These black-holes would decay rapidly by Hawking radiation into characteristic high multiplicity states of Standard Model particles and induce extensive air showers potentially detectable by a large surface neutrino detector. In this paper we study the possibility to detect microscopic black-holes exemplifying it in case of the surface detector of the Pierre Auger Observatory. The expected event rate is calculated for up-going and down-going showers induced by microscopic black-holes. Our calculations show a significant deviation of the expected rate compared to the rate expected by Standard Model predictions. The rates of up-going neutrinos are almost completely suppressed, whereas the rate of down-going neutrinos increase by a factor of about 50 with respect to standard model calculations. The non observation of up-going neutrinos by the Pierre Auger Observatory in conjunction with a high rate of down-going neutrino-induced showers, would be a strong indication of physics beyond the Standard Model.
Góra Dariusz
Haag Maja
Roth Marcel
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