Z^0与W^+W^-对强子衰变中的Bose-Einstein关联  

Bose-Einstein Correlations in Hadronic Z^0 and W^+W^- Decay

作　　者：戴启润[1] 赵喜[2] 李积梅[1] 赵树松[2] 

机构地区：[1]信阳师范学院物理系,河南信阳464000 [2]云南大学物理系,昆明650091

出　　处：《郑州大学学报（理学版）》2003年第2期26-31,共6页Journal of Zhengzhou University:Natural Science Edition

基　　金：河南省科委自然科学基金项目

摘　　要：广义函数 (Q/〈Q〉) ν+μKν( βQ/〈Q〉)表达的Bose Einstein关联与DELPHI数据 (Z0 衰变 )及ALEPH数据 (W±衰变 )吻合 ,包括 0 2 5 <Q <0 9GeV中的低凹现象 .关联半径r0 (ππ) /r0 (KK) (mK/mπ) 1/ 3,具有明显的质量效应 .强子发射源半径rG在误差范围内不依赖于质量mB.量子场反常维度γB=( - 0 .0 42± 0 .0 0 1)与mB无关 。DELPHI-date(Z 0→K ±K ±X,K 0 SK 0 SX) and ALEPH-date can be described by the correlation expression (Q/〈Q〉) ν+μK ν(βQ/〈Q〉).They are the “Mathematical Distributions” in the sence of L.Schwartz(Zeneralised Functions),the shallow dip is also included in the region 0.25<Q<0.90 GeV.The Correlation-radius possesses the mass effects that,r 0(ππ)/r 0(KK)≈(m K/m π) 1/3.The radius r G of the hadronic emission source is independent of the mass within the experimental errors.The anomalous dimensions of the bose hadrons (γ B(g R)=-(0.042±0.001)) have the same value for the pion and kaon.The γ B(g R) reflects the nonlinear feature of Bose-Einstein Correlations (interferences).

关 键 词：Z^0衰变 W^+W^-衰变 Bose-Einstein关联 非线性干涉 质量效应 量子场 反常维度 关联半径 

分 类 号：O571.32[理学—粒子物理与原子核物理]