Four-pion production in {tau} decays and e{sup +}e{sup -} annihilation: An update

Journal Article · Sun Jun 01 00:00:00 EDT 2008 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.77.114005· OSTI ID:21205068

Czyz, Henryk; Kuehn, Johann H; Wapienik, Agnieszka ^[1]

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1. Institute of Physics, University of Silesia, PL-40007 Katowice (Poland)

An improved description of four-pion production in electron-positron annihilation and in {tau}-lepton decays is presented. The model amplitude is fitted to recent data from BABAR which cover a wide energy range and which were obtained exploiting the radiative return. Predicting {tau}-decay distributions from e{sup +}e{sup -} data and comparing these predictions with ALEPH and CLEO results, the validity of isospin symmetry is confirmed within the present experimental errors. A good description of two- and three-pion subdistributions is obtained. Special emphasis is put on the predictions for {omega}{pi}({yields}{pi}{sup +}{pi}{sup -}{pi}{sup 0}) in e{sup +}e{sup -} annihilation and in {tau} decay. The model amplitude is implemented in the Monte Carlo generator PHOKHARA.

• OSTI ID: 21205068
• Journal Information: Physical Review. D, Particles Fields, Vol. 77, Issue 11; Other Information: DOI: 10.1103/PhysRevD.77.114005; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AMPLITUDES
ANNIHILATION
CESR STORAGE RING
DECAY
DISTRIBUTION
ELECTRON-POSITRON INTERACTIONS
ELECTRONS
ENERGY RANGE
FORECASTING
ISOSPIN
MONTE CARLO METHOD
MULTIPARTICLE SPECTROMETERS
PARTICLE IDENTIFICATION
PARTICLE PRODUCTION
PIONS MINUS
PIONS NEUTRAL
POSITRONS
SIMULATION
SYMMETRY
TAU PARTICLES