Comment on “Black Holes are Neither Particle Accelerators Nor Dark Matter Probes”
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چکیده
منابع مشابه
Black holes are neither particle accelerators nor dark matter probes.
It has been suggested that maximally spinning black holes can serve as particle accelerators, reaching arbitrarily high center-of-mass energies. Despite several objections regarding the practical achievability of such high energies, and demonstrations past and present that such large energies could never reach a distant observer, interest in this problem has remained substantial. We show that, ...
متن کاملComment on "Black holes are neither particle accelerators nor dark matter probes".
The Banados-Silk-West effect consists in the possibility to get infinite energy in the centre of mass frame of two particles colliding near the black hole horizon. Ac-at infinity of the outcome vanishes because of infinite redshift when the point of collision approaches the horizon. I show that this is not so. The effect discovered by Bañados, Silk and West (BSW) states that if two particles co...
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By studying the BPS equations for electrostatic and spherically symmetric configurations in N = 2, d = 5 gauged supergravity with vector multiplets and hypermultiplets coupled, we demonstrate that no regular supersymmetric black-hole solutions of this kind exist. Furthermore, we demonstrate that it is not possible to construct supersymmetric regular solitons that have the above symmetries. As a...
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While the energy of the universe has been established to be about 0.04 baryons, 0.24 dark matter and 0.72 dark energy, the cosmological entropy is almost entirely, about (1−10), from black holes and only 10 from everything else. This identification of all dark matter as black holes is natural in statistical mechanics. Cosmological history of dark matter is discussed. [email protected]
متن کاملComment on "Kerr black holes as particle accelerators to arbitrarily high energy".
Emanuele Berti, Vitor Cardoso, Leonardo Gualtieri, Frans Pretorius, Ulrich Sperhake 1 California Institute of Technology, Pasadena, CA 91109, USA 2 Department of Physics and Astronomy, The University of Mississippi, University, MS 38677, USA 3 CENTRA, Departamento. de F́ısica, Instituto. Superior. Técnico, Av. Rovisco Pais 1, 1049 Lisboa, Portugal 4 Dipartimento di Fisica, Università di Roma “Sa...
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 2013
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.111.079001