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Kinematic Censorship as a Constraint on Allowed Scenarios of High-Energy Particle Collisions

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dc.contributor.author Pavlov Y.
dc.contributor.author Zaslavskii O.
dc.date.accessioned 2020-01-15T21:17:24Z
dc.date.available 2020-01-15T21:17:24Z
dc.date.issued 2019
dc.identifier.issn 0202-2893
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/155542
dc.description.abstract © 2019, Pleiades Publishing, Ltd. In the recent years, it was found that the energy Ec.m. in the center of mass frame of two colliding particles can be unbounded near black holes. If a collision occurs precisely on the horizon, Ec.m. is formally infinite. However, in any physically reasonable situation this is impossible. We collect different scenarios of this kind and show why in every act of collision Ec.m. is indeed finite (although it can be as large as one likes). The factors preventing an infinite energy are diverse: the necessity of infinite proper time, infinite tidal forces, potential barrier, etc. This prompts us to formulate a general principle according to which the limits in which Ec.m.→ 8 are never achieved. We call this the kinematic censorship (KC). Although by itself the validity of KC is quite natural, its application allows one to forbid scenarios of collisions predicting infinite Ec.m. without going into details. The KC is valid even in the test particle approximation, so an explanation of why Ec.m. cannot be infinite does not require references (common in the literature) to a nonlinear regime, back-reaction, etc. The KC remains valid not only for freely moving particles but also if particles are subject to a finite force. For an individual particle, we consider a light-like continuous limit of a timelike trajectory in which the effective mass turns to zero. We show that it cannot be accelerated to an infinite energy during a finite proper time under the action of such a force. As an example, we consider the dynamics of a scalar particle interacting with a background scalar field.
dc.relation.ispartofseries Gravitation and Cosmology
dc.title Kinematic Censorship as a Constraint on Allowed Scenarios of High-Energy Particle Collisions
dc.type Article
dc.relation.ispartofseries-issue 4
dc.relation.ispartofseries-volume 25
dc.collection Публикации сотрудников КФУ
dc.relation.startpage 390
dc.source.id SCOPUS02022893-2019-25-4-SID85076361888


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  • Публикации сотрудников КФУ Scopus [24551]
    Коллекция содержит публикации сотрудников Казанского федерального (до 2010 года Казанского государственного) университета, проиндексированные в БД Scopus, начиная с 1970г.

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