K^++Al(Au)反应的B-E关联及其方向性

Bose-Einstein correlation and its diretional dependence in interaction of K^++Al(Au)

研究了250 GeV/c下K++Al(Au)和K++Au反应的B—E关联,用Q-νKν(Q)分布拟合实验数据得出r0=3.5fm(K++Al),4.1fm(K++Au).对同一实验,进一步分析B—E关联的角关系,得出a=0.53±0.13fm(K++Al),0.33±0.21fm(K++Au).在c,m,s系中,π介子发射源在碰撞轴方向被拉长.

the B-E correlation is studied in interaction of K＋＋Al（Au）at 250Gev/c in this paper.The experimental data is fitted by the Q-vKv（Q） distribution,and r0=3.5fm（K＋＋Al）,r0=4.1fm（K＋＋Au）.The angular dependence of B-E correlation is studied at same experimental data.The pion source is found to be elongated along the interaction axis in the c.m.s,with the ratic a equal to 0.53±0.13（K＋＋Al）and0.33±0.21（K＋＋Au）.