Cosmic censorship, massless fermionic test fields, and absorption probabilities

Name: Cosmic censorship, massless fermionic test fields, and absorption probabilities
Author: Düztaş, Koray

İsim	Cosmic censorship, massless fermionic test fields, and absorption probabilities
Yazar	Düztaş, Koray
Basım Tarihi:	2021-12-24
Basım Yeri	- Springer
Tür	Süreli Yayın
Dil	İngilizce
Dijital	Evet
Yazma	Hayır
Kütüphane:	Özyeğin Üniversitesi
Demirbaş Numarası	1434-6044
Kayıt Numarası	915de062-da10-458d-8255-f17c3d898085
Lokasyon	Natural and Mathematical Sciences
Tarih	2021-12-24
Örnek Metin	In the conventional approach, fermionic test fields lead to a generic overspinning of black holes resulting in the formation of naked singularities. The absorption of the fermionic test fields with arbitrarily low frequencies is allowed for which the contribution to the angular momentum parameter of the space-time diverges. Recently we have suggested a more subtle treatment of the problem considering the fact that only the fraction of the test fields that is absorbed by the black hole contributes to the space-time parameters. Here, we re-consider the interaction of massless spin (1/2) fields with Kerr and Kerr-Newman black holes, adapting this new approach. We show that the drastic divergence problem disappears when one incorporates the absorption probabilities. Still, there exists a range of parameters for the test fields that can lead to overspinning. We employ backreaction effects due to the self-energy of the test fields which fixes the overspinning problem for fields with relatively large amplitudes, and renders it non-generic for smaller amplitudes. This non-generic overspinning appears likely to be fixed by alternative semi-classical and quantum effects.
DOI	10.1140/epjc/s10052-021-09937-5
Cilt	81

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Cosmic censorship, massless fermionic test fields, and absorption probabilities

Yazar Düztaş, Koray

Basım Tarihi 2021-12-24

Basım Yeri - Springer

Tür Süreli Yayın

Dil İngilizce

Dijital Evet

Yazma Hayır

Kütüphane Özyeğin Üniversitesi

Demirbaş Numarası 1434-6044

Kayıt Numarası 915de062-da10-458d-8255-f17c3d898085

Lokasyon Natural and Mathematical Sciences

Tarih 2021-12-24

Örnek Metin In the conventional approach, fermionic test fields lead to a generic overspinning of black holes resulting in the formation of naked singularities. The absorption of the fermionic test fields with arbitrarily low frequencies is allowed for which the contribution to the angular momentum parameter of the space-time diverges. Recently we have suggested a more subtle treatment of the problem considering the fact that only the fraction of the test fields that is absorbed by the black hole contributes to the space-time parameters. Here, we re-consider the interaction of massless spin (1/2) fields with Kerr and Kerr-Newman black holes, adapting this new approach. We show that the drastic divergence problem disappears when one incorporates the absorption probabilities. Still, there exists a range of parameters for the test fields that can lead to overspinning. We employ backreaction effects due to the self-energy of the test fields which fixes the overspinning problem for fields with relatively large amplitudes, and renders it non-generic for smaller amplitudes. This non-generic overspinning appears likely to be fixed by alternative semi-classical and quantum effects.

DOI 10.1140/epjc/s10052-021-09937-5

Cilt 81