Journal
NUCLEAR PHYSICS B
Volume 954, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.nuclphysb.2020.115010
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Funding
- MIUR-PRIN contract Non-perturbative aspects of gauge theories and strings [2015MP2CX4002]
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We discuss how the Penrose process, taking place in singular rotating Kerr black holes as well as in their smooth, horizonless fuzz-ball counterparts in string theory, may provide an efficient mechanism for the acceleration of Ultra High Energy Cosmic Rays, including strangelets, a form of Strange Quark Matter that is under active experimental investigation with Mini-EUSO. We focus on non-BPS solutions of the JMaRT kind that present an ergo-region. We study geodetic motion and the (non-collisional) Penrose process in this context. In particular we compute its efficiency that turns out not to be bounded unlike for Kerr BH's and briefly comment on possible implications for near-future observations. (C) 2020 The Authors. Published by Elsevier B.V.
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