Drag force on a moving heavy quark with deformed string configuration  

作　　者：Sara Tahery Xurong Chen 

机构地区：[1]Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China [2]University of Chinese Academy of Sciences,Beijing 100049,China [3]Guangdong Provincial Key Laboratory of Nuclear Science,Institute of Quantum Matter,South China Normal University,Guangzhou 510006,China

出　　处：《Communications in Theoretical Physics》2022年第4期61-67,共7页理论物理通讯（英文版）

基　　金：supported by Strategic Priority Research Program of Chinese Academy of Sciences(XDB34030301);supported by the PIFI(2021PM0065)。

摘　　要：To study drag force on a moving heavy quark through a plasma,we use a deformed AdS spacetime,in which deformation parameter c describes non-conformality in AdS/QCD.In this case,the quark is mapped to a probe string in the AdS space.Considering the probable contribution of the deformation parameter in the probe string,we apply a general form of c-dependent string ansatz in the drag force computation.Then,we find the acceptable value of this parameter as it satisfies QCD calculations.Using this result,we also discuss the diffusion constant which is in agreement with the phenomenological result for the non-relativistic limit.Also,we show that while in absence of a deformation parameter,the probe string is a strictly increasing function of radial coordinate,the c-dependent probe string has a maximum value versus z.

关 键 词：AdS/QCD drag force deformation parameter 

分 类 号：O572.33[理学—粒子物理与原子核物理]