OBSERVATION OF THE DECAY TAU-]RHO-PI-PI-NU-TAU

被引：19

作者：

ALBRECHT, H

机构：

[1] DESY

[2] Institut für Physik1 1 Supported by the German Bundesministerium für Forschung und Technologie, under contract number 054DO51P., Universität Dortmund

[3] Physikalisches Institut2 2 Supported by the German Bundesministerium für Forschung und Technologie, under contract number 054ER12P., Universität Erlangen-Nürnberg

[4] II. Institut für Experimentalphysik, Universität Hamburg

[5] Institut für Hochenergiephysik3 3 Supported by the German Bundesministerium für Forschung und Technologie, under contract number 054HD24P., Universität Heidelberg

[6] Max-Planck-Institut für Kernphysik, Heidelberg

[7] Institute of Particle Physics8 8 Supported by the Natural Sciences and Engineering Research Council, Canada.

[8] Institut für Experimentalle Kernphysik9 9 Supported by the German Bundesministerium für Forschung und Technologie, under contract number 054KA17P., Universität Karlsruhe

[9] Institute of Physics11 11 Supported by the Swedish Research Council., University of Lund

[10] Institute of Theoretical and Experimental Physics

[11] University of South Carolina12 12 Supported by the US, Department of Energy, Columbia, SC 29208

来源：

PHYSICS LETTERS B | 1991年 / 260卷 / 1-2期

关键词：

D O I：

10.1016/0370-2693(91)91000-L

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

An analysis of the decay tau- --> pi-pi-pi+pi-0-nu-tau has been performed with the ARGUS detector at the DORIS II storage ring. From a study of the two pion subsystems we have found first evidence for the decays tau- --> rho-0-pi-pi-0-nu-tau, tau- --> rho-pi+pi-nu-tau, and tau- --> rho+pi-pi-nu-tau with relative contributions to the decay tau- --> pi-pi-pi+pi-0-nu-tau of 0.30 +/- 0.04, 0.26 +/- 0.05, and 0.10 +/- 0.03, respectively. The fraction of the subchannel tau- --> omega-pi-nu-tau has been determined to be 0.33 +/- 0.05. The production of rho mesons is enhanced by a factor of 1.9 +/- 0.3 over that of omega mesons. We conclude that in more than 81% (95% CL) of all tau- --> pi-pi-pi+pi-0-nu-tau decays either a rho or omega meson is produced.

引用

页码：259 / 264

页数：6

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