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Production and decay of tau leptons in e/sup +/e/sup -/ annihilation at PETRA energies

Journal Article:

Abstract

We have observed tau pair production at average CM energies of 13.9, 22.3, 34.5 and 43.1 GeV. The cross-sections are consistent with QED, the cut off parameters being ..lambda..sub(+)>161 GeV and ..lambda..sub(-)>169 GeV (95% CL). The topological branching fraction of the tau to 1 charged particle, B/sub 1/, is 0.847+-0.011 (stat)(+0.016-0.013)(syst) and no decays to 5 charged particles were observed resulting in B/sub 5/<0.007 (95% CL). Within the 3 charged track final state B(tau/sup -/->..pi../sup -/..pi../sup +/..pi../sup -/..nu..)/B(tau/sup -/->..pi../sup -/..pi../sup +/..pi../sup -/..nu..)+B(tau->..pi../sup -/..pi../sup +/..pi../sup -/..pi../sup 0/..nu..))=0.37(+0.35-0.20).
Publication Date:
Jan 01, 1985
Product Type:
Journal Article
Reference Number:
FRG-84-02200; EDB-85-062341
Resource Relation:
Journal Name: Z. Phys. C; (Germany, Federal Republic of); Journal Volume: 26:4; Other Information: Also published as report DESY--84-091; OUNP--65/84
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ELECTRON-POSITRON INTERACTIONS; ANNIHILATION; PAIR PRODUCTION; TAU PARTICLES; SEMILEPTONIC DECAY; ANGULAR DISTRIBUTION; ASYMMETRY; BRANCHING RATIO; DIFFERENTIAL CROSS SECTIONS; ENERGY DEPENDENCE; EXPERIMENTAL DATA; GEV RANGE 10-100; INTEGRAL CROSS SECTIONS; NEUTRAL-CURRENT INTERACTIONS; PIONS MINUS; PIONS NEUTRAL; PIONS PLUS; QUANTUM ELECTRODYNAMICS; SCALING LAWS; TAU NEUTRINOS; BASIC INTERACTIONS; BOSONS; CROSS SECTIONS; DATA; DECAY; DISTRIBUTION; ELECTRODYNAMICS; ELECTROMAGNETIC INTERACTIONS; ELEMENTARY PARTICLES; ENERGY RANGE; FERMIONS; FIELD THEORIES; GEV RANGE; HADRONS; HEAVY LEPTONS; INFORMATION; INTERACTIONS; LEPTON-LEPTON INTERACTIONS; LEPTONS; MASSLESS PARTICLES; MESONS; NEUTRINOS; NUMERICAL DATA; PARTICLE DECAY; PARTICLE INTERACTIONS; PIONS; POSTULATED PARTICLES; PSEUDOSCALAR MESONS; QUANTUM FIELD THEORY; WEAK PARTICLE DECAY; 645101* - High Energy Physics- Particle Interactions & Properties-Experimental- Electromagnetic Interactions & Properties; 645102 - High Energy Physics- Particle Interactions & Properties-Experimental- Weak Interactions & Properties
OSTI ID:
5970841
Country of Origin:
Germany
Language:
English
Other Identifying Numbers:
Journal ID: CODEN: ZPCFD
Submitting Site:
HEDB
Size:
Pages: 521-530
Announcement Date:

Journal Article:

Citation Formats

Althoff, M, Braunschweig, W, Kirschfink, F J, Luebelsmeyer, K, Martyn, H U, Rosskamp, P, Schmitz, D, Siebke, H, Wallraff, W, and Eisenmann, J. Production and decay of tau leptons in e/sup +/e/sup -/ annihilation at PETRA energies. Germany: N. p., 1985. Web.
Althoff, M, Braunschweig, W, Kirschfink, F J, Luebelsmeyer, K, Martyn, H U, Rosskamp, P, Schmitz, D, Siebke, H, Wallraff, W, & Eisenmann, J. Production and decay of tau leptons in e/sup +/e/sup -/ annihilation at PETRA energies. Germany.
Althoff, M, Braunschweig, W, Kirschfink, F J, Luebelsmeyer, K, Martyn, H U, Rosskamp, P, Schmitz, D, Siebke, H, Wallraff, W, and Eisenmann, J. 1985. "Production and decay of tau leptons in e/sup +/e/sup -/ annihilation at PETRA energies." Germany.
@misc{etde_5970841,
title = {Production and decay of tau leptons in e/sup +/e/sup -/ annihilation at PETRA energies}
author = {Althoff, M, Braunschweig, W, Kirschfink, F J, Luebelsmeyer, K, Martyn, H U, Rosskamp, P, Schmitz, D, Siebke, H, Wallraff, W, and Eisenmann, J}
abstractNote = {We have observed tau pair production at average CM energies of 13.9, 22.3, 34.5 and 43.1 GeV. The cross-sections are consistent with QED, the cut off parameters being ..lambda..sub(+)>161 GeV and ..lambda..sub(-)>169 GeV (95% CL). The topological branching fraction of the tau to 1 charged particle, B/sub 1/, is 0.847+-0.011 (stat)(+0.016-0.013)(syst) and no decays to 5 charged particles were observed resulting in B/sub 5/<0.007 (95% CL). Within the 3 charged track final state B(tau/sup -/->..pi../sup -/..pi../sup +/..pi../sup -/..nu..)/B(tau/sup -/->..pi../sup -/..pi../sup +/..pi../sup -/..nu..)+B(tau->..pi../sup -/..pi../sup +/..pi../sup -/..pi../sup 0/..nu..))=0.37(+0.35-0.20).}
journal = {Z. Phys. C; (Germany, Federal Republic of)}
volume = {26:4}
journal type = {AC}
place = {Germany}
year = {1985}
month = {Jan}
}