Positronium Decay in a Circular Polarized Laser Field  

作　　者：陈裕启 吴培 

机构地区：[1]Key Laboratory of Frontiers in Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences

出　　处：《Communications in Theoretical Physics》2013年第12期747-752,共6页理论物理通讯（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant No.11275242

摘　　要：We calculate the lifetime of both the o-Ps and the p-Ps positronium annihilation decay Ps →γγ in the strong circular polarized laser field. We take a strategy of the faztorization to separate the effects caused by the Coulomb interaction and the strong laser 6eld interaction. It is factorized in the time direction but not in the space direction. Our results show that in the laser with long wavelength and high intensity, the lifetimes of those Ps states are dramatically increased. For C02 laser with 10 μm wavelength and 1013 W/cm2 intensity, lifetime of the spin-single positronium is increased by 108 times. Our result is consistent with those obtained by solving the SchSdinger equation. This effect may be useful for the high harmonic generation （HHG） effects provided with the Ps [Phys. Rev. Lett. 70 （1993） 774; Phys. Rev. Lett. 93 （2004） 013601].

关 键 词：POSITRONIUM strong-field physics LASER DECAY 

分 类 号：O571.32[理学—粒子物理与原子核物理]