关于Kerr-Sen黑洞隧穿辐射的新改进研究

An improved research on tunneling radiation from the Kerr-Sen black hole

本文首先采用Euler-Lagrange变分原理,由有质量带电粒子的经典作用量出发,在一般(非拖曳)坐标系下对Kerr-Sen转动黑洞中的类时和类光测地线方程作了新的统一推导,然后采用Parikh-Wilczek建议的半经典隧穿方法,对有质量带电粒子在Kerr-Sen黑洞视界附近的隧穿辐射重新做了研究,并给出了其隧穿几率.研究表明该转动黑洞的隧穿辐射不再局限于使用拖曳坐标系.

Starting from the action of the massive charged particles, we have firstly applied the Euler-Lagrange＇s variation method to give a new derivation of the time-like and null geodesic equations of the rotating Kerr-Sen black hole in a general（nondragging） coordinate system. Adopting the semi-classical tunneling method proposed by Parikh and Wilczek, we then reinvestigate the tunneling radiation of a massive charged particle from the event horizon of the Kerr-Sen black holes, and present the tunneling probability also. This work demonstrates that the study of tunneling radiation from this rotation black hole may not be limited in using a dragging coordinate system.