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Black Holes from Cosmic Rays: Probes of Extra Dimensions and New Limits on TeV-Scale Gravity | | Luis A. Anchordoqui
; Jonathan L. Feng
; Haim Goldberg
; Alfred D. Shapere
; | | Date: |
19 Dec 2001 | | Journal: | Phys.Rev. D65 (2002) 124027 | | Subject: | hep-ph astro-ph gr-qc hep-ex hep-th | | Abstract: | If extra spacetime dimensions and low-scale gravity exist, black holes will be produced in observable collisions of elementary particles. For the next several years, ultra-high energy cosmic rays provide the most promising window on this phenomenon. In particular, cosmic neutrinos can produce black holes deep in the Earth’s atmosphere, leading to quasi-horizontal giant air showers. We determine the sensitivity of cosmic ray detectors to black hole production and compare the results to other probes of extra dimensions. With n ge 4 extra dimensions, current bounds on deeply penetrating showers from AGASA already provide the most stringent bound on low-scale gravity, requiring a fundamental Planck scale M_D > 1.3 - 1.8 TeV. The Auger Observatory will probe M_D as large as 4 TeV and may observe on the order of a hundred black holes in 5 years. We also consider the implications of angular momentum and possible exponentially suppressed parton cross sections; including these effects, large black hole rates are still possible. Finally, we demonstrate that even if only a few black hole events are observed, a standard model interpretation may be excluded by comparison with Earth-skimming neutrino rates. | | Source: | arXiv, hep-ph/0112247 | | Services: | Forum | Review | PDF | Favorites | |
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