A STUDY OF BOSE-EINSTEIN CORRELATIONS IN E+E- ANNIHILATIONS AT LEP

被引：67

作者：

ACTON, PD

机构：

[1] Brunel University, Uxbridge

[2] Department of Physics and Astronomy, Tel Aviv University, Tel Aviv

[3] Department of Physics, Schuster Laboratory, The University, Manchester

[4] Cavendish Laboratory, Cambridge

[5] Enrico Fermi Institute, Department of Physics, University of Chicago, Chicago

[6] Dipartimento di Fisica dell' Università di Bologna, INFN

[7] Department of Physics, Carleton University, Colonel By Drive, Ottawa

[8] Laboratoire de Physique Nucléaire, Université de Montréal, Montreal

[9] Department of Physics and Astronomy, University of Maryland, College Park

[10] Queen Mary and Westfield College, University of London, London

[11] Fakultät für Physik, Albert Ludwigs Universität

[12] CERN, European Organization for Particle Physics

[13] Rutherford Appleton Laboratory, Chilton, Didcot

[14] Physikalisches Institut, Universität Heidelberg

[15] Physikalisches Institut, Universität Bonn

[16] School of Physics and Space Research, University of Birmingham, Birmingham

[17] Department of Physics, Indiana University, Swain Hall West 117, Bloomington

[18] University College London, London

[19] Department of Physics, Technion-Israel Institute of Technology, Haifa

[20] Birkbeck College, London

[21] DphPE, CEN-Saclay

[22] Department of Physics, University of California, Riverside

[23] Centre for Research in Particle Physics, Carleton University, Ottawa

[24] Nuclear Physics Department, Weizmann Institute of Science, Rehovot

[25] International Center for Elementary Particle Physics and Department of Physics, University of Tokyo

[26] Japan and Kobe University

[27] National Research Council of Canada, Herzberg Institute of Astrophysics, Ottawa

来源：

PHYSICS LETTERS B | 1991年 / 267卷 / 01期

基金：

美国国家科学基金会; 加拿大自然科学与工程研究理事会;

关键词：

D O I：

10.1016/0370-2693(91)90540-7

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Bose-Einstein correlations between like-sign charged track pairs have been studied in e+e- annihilation hadronic events at centre-of-mass energies around the Z0 peak as a function of Q, the four-momentum difference of the pair. The measurement was performed with the OPAL detector at LEP. Assuming the charged tracks to be pions, the observed Bose-Einstein enhancement was used to extract the values of the strength of the effect and the radius of the pion emitting source, which were found to be lambda = 0.866 +/- 0.032 +/- 0.140 and R0 = 0.928 +/- 0.019 +/- 0.150 fm, respectively, where the first error is statistical and the second is systematic. The results do not show significant variation in comparison to e+e- annihilation measurements at lower centre-of-mass energies. If non-pion track contamination is taken into account, the value of the strength lambda becomes consistent with unity.

引用

页码：143 / 153

页数：11

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