論文

査読有り
2012年7月

Upper limits of particle emission from high-energy collision and reaction near a maximally rotating Kerr black hole

PHYSICAL REVIEW D
  • Tomohiro Harada
  • ,
  • Hiroya Nemoto
  • ,
  • Umpei Miyamoto

86
2
開始ページ
024027
終了ページ
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1103/PhysRevD.86.024027
出版者・発行元
AMER PHYSICAL SOC

The center-of-mass energy of two particles colliding near the horizon of a maximally rotating black hole can be arbitrarily high if the angular momentum of either of the incident particles is fine-tuned, which we call a critical particle. We study particle emission from such high-energy collision and reaction in the equatorial plane fully analytically. We show that the unconditional upper limit of the energy of the emitted particle is given by 218.6% of that of the injected critical particle, irrespective of the details of the reaction and this upper limit can be realized for massless particle emission. The upper limit of the energy extraction efficiency for this emission as a collisional Penrose process is given by 146.6%, which can be realized in the collision of two massive particles with optimized mass ratio. Moreover, we analyze perfectly elastic collision, Compton scattering, and pair annihilation and show that net positive energy extraction is really possible for these three reactions. The Compton scattering is most efficient among them and the efficiency can reach 134.3%. On the other hand, our result is qualitatively consistent with the earlier claim that the mass and energy of the emitted particle are at most of order the total energy of the injected particles and hence we can observe neither super-heavy nor super-energetic particles. The present paper places the baseline for the study of particle emission from high-energy collision near a rapidly rotating black hole.


リンク情報
DOI
https://doi.org/10.1103/PhysRevD.86.024027
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000306470400001&DestApp=WOS_CPL
ID情報
  • DOI : 10.1103/PhysRevD.86.024027
  • ISSN : 1550-7998
  • Web of Science ID : WOS:000306470400001

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