Study The Effects Of Fluctuating Initial Conditions On Jet Quenching By Suppression Of Single Hadron And Dihadron Spectra

A series of experiments of high-energy heavy-ion collisions had been carried out se-quentially at the BNL Relativistic Heavy Ion Collider(RHIC)and the CERN Large Hadron Collider(LHC),a new state of matter called quark gluon plasma(QGP)may exist with the energy density greater than 1GeV/fm3.The studying of this high temperature and high density matter has become a hot issue in the fields of high energy physical theory and experimental research which has contributed to further understand the basic composition and the law of interaction of matters for us.Besides that,QGP matter is also considered to be created in the early stage of the Big Bang,the studying of QGP will also further help us to research the early evolution of the universe,formation and research of galaxy.Actu-ally,ultra-relativistic heavy-ion collision is the most effective way to create the condition of high temperature and high density environment to form this matter.In the early stage of nucleus-nucleus collision,multiple scattering and radiation of gluons occur when high transverse momentum partons Jets go through the QGP,the final hadron spectra will be greatly suppressed due to energy loss,the phenomenon is so called as jet quenching,It can be used as significant probes for the research of QGP.We use the next-to-leading order(NLO)perturbative QCD and carry out such a study using 2+1-dimensional ideal hydrodynamic model to describe the evolution with time of the QGP in our study.We get the parametric form of jet energy loss by hight-twist approach in the calculation.We get nuclear modification factor RAA for single hadron and IAA for dihadron in different central nucleus-nucleus collisions in smooth initial conditions and fluctuating initial conditions through theoretical calculation,and study the effects of fluctuating initial conditions on the jet quenching by the suppression of single hadron and dihadron spectra.In our research,we found that comparing to the soomth initial conditions,the nuclear modification factor is smaller with fluctuating initial conditions for single hadron and dihadron,It shows the nuclear modification factor has been suppressed and partons Jets will loss more energy with fluctuating initial conditions,and the suppress effect becomes more obvious in non-central collision than in central collision.With the increase of the single hadron and dihadron's transverse momentum,the effects of the fluctuating initial conditions is reduced.Further analysis found that effects of fluctuating initial conditions on jet quenching given by dihadron process is more significant than that given by single hadron process.On the one hand our research is helpful to accurately calibrate the strength of the initial partons Jets;on the other hand,it is also helpful for the accurate measurement of the energy loss of the partons Jets.