Rotating Bardeen black hole surrounded by perfect fluid dark matter as a particle accelerator  

作　　者：Qi-Quan Li Yu Zhang Qian Li Qi Sun 

机构地区：[1]Faculty of Science,Kunming University of Science and Technology,Kunming,Yunnan 650500,China

出　　处：《Communications in Theoretical Physics》2023年第10期111-120,共10页理论物理通讯（英文版）

基　　金：the National Natural Science Foundation of China(Grant No.12065012);Yunnan Fundamental Research Projects(Grant No.202301AS070029);Yunnan High-level Talent Training Support Plan Young and Elite Talents Project(Grant No.YNWR-QNBJ-2018-360)。

摘　　要：We study the event horizon of a rotating Bardeen black hole surrounded by perfect fluid dark matter and the black hole as a particle accelerator.The black hole is represented by four parameters:mass M,rotation parameter a,dark matter parameterαand magnetic charge g.It is interesting that when we determine the values of magnetic charge g and dark matter parametersαwe can get a critical rotation parameter aEand then we get a contour plane withΔ=0 taking three parameters as coordinates.We also derive the effective potential of the particle and the center-of-mass(CM)energy of the two particles outside the black hole by using the motion equations of the particle in the equatorial plane of the black hole.We find that the CM energy depends not only on the rotation parameter a,but also on the parameters g andα.We discuss the CM energy for two particles colliding at the black hole horizon in the extreme and non-extreme cases,respectively.It is found that the CM energy can become arbitrarily high when the angular momentum of one of the two particles is the critical angular momentum under the background of extreme black holes and there is no such result for non-extreme black holes,because the particles do not reach the black hole horizon when the angular momentum of the particles is critical angular momentum.Therefore,we prove that the rotating Bardeen black hole surrounded by perfect fluid dark matter can be used as a particle accelerator.

关 键 词：black hole particle accelerator critical angular momentum center-of-mass(CM)energy 

分 类 号：O57[理学—粒子物理与原子核物理]