相对论重离子对撞中喷注淬灭的研究

喷注淬灭现象是相对论重离子碰撞中可能产生高温高密新核物质—夸克胶子等离子体（Quark-Gluon Plasma,QGP）的特征之一.我们分别测量质子-质子碰撞和重离子碰撞中的各种强子谱产额,并通过比较不同体系强子谱的产额,发现重离子碰撞中强子产额相对于质子-质子碰撞产额有所压低,进而研究喷注淬灭机制.不同强子产额的压低程度检验了一些理论预言,并为新的理论的提出提供重要的实验依据.

Jet quenching in relativistic heavy ion collisions

Jet quenching is one of main properties for Quark-Gluon Plasma（QGP） made by relativistic heavy ions collision.We measure different kinds of hadron spectra in p＋p and Au＋Au collisions,respectively.By comparing hadron spectra in Au＋Au collision with that in p＋p collision,we find there is obvious suppression for particle yields in Au＋Au collision relative to p＋p collisions.To study the quenching mechanism,we compare our measurements with theoretical calculations or predictions and give some conclusions.