Published October 1983 | Version v1
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Branching ratio and mass spectrum of the decay tau' -> tau π+π-

Creators

  • 1. Dortmund Univ. (Germany, F.R.). Inst. fuer Physik
  • 2. Heidelberg Univ. (Germany, F.R.). Inst. fuer Hochenergiephysik
  • 3. Kansas Univ., Lawrence (USA)
  • 4. Lund Univ. (Sweden). Dept. of Physics
  • 5. Institut Teoreticheskoj i Ehksperimental'noj Fiziki, Moscow (USSR)
  • 6. South Carolina Univ., Columbia (USA)

Description

The reaction e+e- -> T' -> π+π-, with T -> anything has been measured using the ARGUS detector at DORIS. We obtain a mass difference M(T') -M(T) = (562 +- 3) MeV and a decay branching ratio Br(T' -> T π+π-) = (17.9 +- 0.9 +- 2.1)%. The invariant mass spectrum of the π+π- system differs from phase space, but is well described by a matrix element of the form (M2sub(ππ) - lambda Msub(π)2) with lambda = 2.6 +- 0.5. We also report preliminary results on the exclusive decay T' -> T π+π-, with T -> e+e-, and obtain BR(T -> e+e-) = (2.8 +- 0.4 +- 0.3)%. (orig.)

Availability note (English)

MF available from INIS under the Report Number.

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Additional details

Publishing Information

Imprint Pagination
14 p.
Report number
DESY--83-101

INIS

Country of Publication
Germany
Country of Input or Organization
Germany
INIS RN
15020168
Subject category
S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
Resource subtype / Literary indicator
Numerical Data
Descriptors DEI
ANNIHILATION; BRANCHING RATIO; EFFECTIVE MASS; ELECTRON-POSITRON INTERACTIONS; ELECTRONS; EXCLUSIVE INTERACTIONS; EXPERIMENTAL DATA; GEV RANGE 10-100; HADRONIC PARTICLE DECAY; INCLUSIVE INTERACTIONS; LEPTONIC DECAY; MASS DIFFERENCE; MASS SPECTRA; MISSING MASS; PAIR PRODUCTION; PIONS MINUS; PIONS PLUS; POSITRONS; UPSILON-10000 RESONANCES; UPSILON-9500 RESONANCES
Descriptors DEC
ANTILEPTONS; ANTIMATTER; ANTIMESONS; ANTIPARTICLES; BASIC INTERACTIONS; BOSONS; DATA; DECAY; ELEMENTARY PARTICLES; ENERGY RANGE; FERMIONS; GEV RANGE; HADRONS; INFORMATION; INTERACTIONS; LEPTON-LEPTON INTERACTIONS; LEPTONS; MASS; MATTER; MESON RESONANCES; MESONS; NUMERICAL DATA; PARTICLE DECAY; PARTICLE INTERACTIONS; PARTICLE PRODUCTION; PARTICLE PROPERTIES; PIONS; PSEUDOSCALAR ANTIMESONS; PSEUDOSCALAR MESONS; RESONANCE PARTICLES; SPECTRA; UPSILON RESONANCES; VECTOR MESONS; WEAK INTERACTIONS; WEAK PARTICLE DECAY

Optional Information

Notes
With 21 refs., 4 figs., 4 tabs. Submitted to Phys. Letters.
Collaborations
ARGUS Collaboration.