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Can a nonextremal black hole be a particle accelerator

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dc.contributor.author Zaslavskii O.B.
dc.date.accessioned 2021-02-26T20:51:01Z
dc.date.available 2021-02-26T20:51:01Z
dc.date.issued 2020
dc.identifier.issn 2470-0010
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/163242
dc.description.abstract © 2020 American Physical Society. We consider particle collisions in the background of a nonextremal black hole. Two particles fall from infinity, particle 1 is fine-tuned (critical), collision occurs in its turning point. The first example is the Reissner-Nordström (RN) one. If the energy at infinity E1 is big enough, the turning point is close to the horizon. Then, we derive a simple formula according to which Ec.m.~E1?-1/2, where ? is a surface gravity. Thus significant growth of Ec.m. is possible if (i) particle 1 is ultrarelativistic (if both particles are ultrarelativistic, this gives no gain as compared to collisions in flat space-time), (ii) a black hole is near-extremal (small ?). In the scenario of multiple collisions the energy Ec.m. is finite in each individual collision. However, it can grow in subsequent collisions, provided new near-critical particles are heavy enough. For neutral rotating black holes, in case (i) a turning point remains far from the horizon but large Ec.m. is still possible. Case (ii) is similar to that for collisions in the RN metric. We develop a general theoretical scheme, direct astrophysical applications can be a next step to be studied.
dc.relation.ispartofseries Physical Review D
dc.title Can a nonextremal black hole be a particle accelerator
dc.type Article
dc.relation.ispartofseries-issue 10
dc.relation.ispartofseries-volume 102
dc.collection Публикации сотрудников КФУ
dc.source.id SCOPUS24700010-2020-102-10-SID85096083716


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  • Публикации сотрудников КФУ Scopus [22633]
    Коллекция содержит публикации сотрудников Казанского федерального (до 2010 года Казанского государственного) университета, проиндексированные в БД Scopus, начиная с 1970г.

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