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arXiv 1012.0748hep-thgr-qc
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Kerr-(反)de Sitter黑洞背景下的粒子加速

Particle Acceleration in Kerr-(anti-) de Sitter Black Hole Backgrounds

Yang Li, Jie Yang, Yun-Liang Li, Shao-Wen Wei, Yu-Xiao Liu

摘要:

最近,BSW等人发现,当一个粒子具有临界角动量$L_\text{C}$时,在极端Kerr黑洞附近两个碰撞粒子的质心能量可以任意高.在他们的论文中,他们考虑了生活在宇宙学常数为零的闵可夫斯基时空中的黑洞。在这项工作中,我们研究了粒子的背景下的克尔黑洞生活在一个非零的时空宇宙学常数的过程。我们发现,对于生活在负宇宙学常数时空中的Kerr黑洞,(Kerr-anti-de Sitter黑洞),只有当Kerr-anti-de Sitter黑洞是极端的并且满足额外的微调时,粒子的这个过程才可能发生;而对于生活在具有正宇宙学常数的时空中的Kerr黑洞(Kerr-de Sitter黑洞),无论Kerr-de Sitter黑洞是否极端,粒子的这种过程都可能发生。我们还研究了某些情况下Kerr-(反)de Sitter黑洞外视界外的粒子碰撞。我们发现有可能在不增加碰撞粒子能量的情况下,通过调整碰撞粒子的角动量来获得较大的质心能量。

英文摘要:

Recently, Banãdos, Silk and West (BSW) found that the center-of-mass energy of two colliding test particles in the neighborhood of an extreme Kerr black hole could be arbitrarily high when one particle has the critical angular momentum $L_\text{C}$. In their paper, they considered the black holes living in a Minkowski space-time with a zero cosmological constant. In this work, we study this process of particles in the backgrounds of the Kerr black holes living in a space-time with a nonzero cosmological constant. We find that for kerr black holes living in a space-time with a negative cosmological constant (Kerr-anti-de Sitter black holes), this process of particles could happen only if the Kerr-anti-de Sitter black hole is extreme and an additional fine tuning is satisfied; while for kerr black holes living in a space-time with a positive cosmological constant (Kerr-de Sitter black holes), this process of particles could happen no matter the Kerr-de Sitter black hole is extreme or not. We also study the particle collision outside the outer horizon of the Kerr-(anti-) de Sitter black hole in some cases. We find that there is a possibility that we could tune one colliding particle's angular momentum to gain the large center-of-mass energy without increase the particle's energy.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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