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Uncertainties in limits on TeV-gravity from neutrino-induced showers |
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| Authors: | Eun-Joo Ahn Marco Cavagli Angela V Olinto |
| Institution: | aDepartment of Astronomy & Astrophysics and Kavli Institute for Cosmological Physics, University of Chicago, 5640 S. Ellis Avenue, Chicago, IL 60637, USA bDepartment of Physics and Astronomy, The University of Mississippi, P.O. Box 1848, University, MS 38677-1848, USA cDepartment of Astronomy & Astrophysics, Enrico Fermi Institute, and Kavli Institute for Cosmological Physics, University of Chicago, 5640 S. Ellis Avenue, Chicago, IL 60637, USA |
| Abstract: | In models with TeV-scale gravity, ultrahigh energy cosmic rays can generate microscopic black holes in the collision with atmospheric and terrestrial nuclei. It has been proposed that stringent bounds on TeV-scale gravity can be obtained from the absence of neutrino cosmic ray showers mediated by black holes. However, uncertainties in the cross section of black hole formation and, most importantly, large uncertainties in the neutrino flux affects these bounds. As long as the cosmic neutrino flux remains unknown, the non-observation of neutrino induced showers implies less stringent limits than present collider limits. |
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