Collision of two general particles around a rotating regular Hayward's black holes
Abstract
The rotating regular Hayward's spacetime, apart from mass ( M) and angular momentum ( a), has an additional deviation parameter ( g) due to the magnetic charge, which generalizes the Kerr black hole when g≠ 0; for g=0 it goes over to the Kerr black hole. We analyze how the ergoregion is affected by the parameter g to show that the area of the ergoregion increases with increasing values of g. Further, for each g, there exists a critical a_E, which corresponds to a regular extremal black hole with degenerate horizons r=r^E_H. a_E decreases whereas r^E_H increases with an increase in the parameter g. Banãdos, Silk, and West (BSW) demonstrated that the extremal Kerr black hole can act as a particle accelerator with arbitrarily high centerofmass energy (E_{CM}) when the collision of two particles takes place near the horizon. We study the BSW process for two particles with different rest masses, m_1 and m_2, moving in the equatorial plane of the extremal Hayward's black hole for different values of g, to show that E_{CM} is arbitrarily high when one of the particles takes a critical value of the angular momentum. Our result, in the limit g → 0, reduces to that of the Kerr black hole.
 Publication:

European Physical Journal C
 Pub Date:
 October 2016
 DOI:
 10.1140/epjc/s1005201643655
 arXiv:
 arXiv:1607.05063
 Bibcode:
 2016EPJC...76..532A
 Keywords:

 General Relativity and Quantum Cosmology
 EPrint:
 16 pages, 4 figures, 1 table