A MODEL INDEPENDENT OBSERVATION OF THE STRING EFFECT USING QUARK TAGGING AT LEP

被引：50

作者：

AKRAWY, MZ

机构：

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

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

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

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

[9] Fakultät für Physik, Albert Ludwigs Universität

[10] CERN, European Organisation for Particle Physics

[11] Physikalisches Institut, Universität Heidelberg

[12] Physikalisches Institut, Universität Bonn

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

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

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

[16] Brunel University, Uxbridge

[17] University College London, London

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

[19] Birkbeck College, London

[20] DPhPE, CEN Saclay

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

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

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

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

[25] Kobe University, Kobe

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

来源：

PHYSICS LETTERS B | 1991年 / 261卷 / 03期

关键词：

D O I：

10.1016/0370-2693(91)90337-P

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Quark and gluon in 3-jet events from hadronic Z0 decays are identified through use of the semi-leptonic decays of charm and bottom quarks. This tagging method allows geometrically symmetric or transposed configurations of the quark and gluon jets to be selected, permitting a study of the asymmetry in the population of particles in the regions between jets commonly called the string effect, which avoids restrictions present in previous studies. In particular, our demonstration of a population asymmetry is performed without use of a model. Our results imply that dynamical differences exist between quarks and gluons or between quark-antiquark and quark-gluon jet systems with respect to their particle production properties.

引用

页码：334 / 346

页数：13

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