Published March 1996 | Version v1
Journal article Metadata-only

Pion polarisability and hadronic τ decays

Creators

  • 1. Tbilisskij Gosudarstvennyj Univ., Tbilisi (Georgia). Inst. for High Energy Physics
  • 2. Manchester Univ. (United Kingdom). Dept. of Astronomy
  • 3. Manchester Univ. (United Kingdom). Dept. of Physics

Description

Recent experimental data on τ decays are used to recontruct the difference in hadronic spectral densities with vector and axial-vector quantum numbers. The saturation of Das-Mathur-Okubo and Weinberg sum rules is studied. Two methods of improving convergence and decreasing errors are applied, and good agreement with the predictions of current algebra and chiral perturbation theory is observed. The resulting value of the pion polarisability is αE=(2.64±0.36) x 10-4 fm3. (orig.)

Additional details

Publishing Information

Journal Title
Nuclear Physics. B, Proceedings Supplements
Journal Volume
54A
Journal Page Range
p. 309-313.
ISSN
0920-5632
CODEN
NPBSE7

Conference

Title
High energy physics international Euroconference on quantum chromodynamics (QCD) and workshop.
Dates
4-12 Jul 1996.
Place
Montpellier (France).

INIS

Country of Publication
Netherlands
Country of Input or Organization
Netherlands
INIS RN
28044076
Subject category
S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
Resource subtype / Literary indicator
Conference, Numerical Data
Descriptors DEI
AXIAL-VECTOR CURRENTS; CONVERGENCE; ERRORS; INTEGRAL CALCULUS; NUMERICAL SOLUTION; PARTICLE STRUCTURE; PIONS; POLARIZABILITY; SEMILEPTONIC DECAY; SPECTRAL DENSITY; SUM RULES; TAU PARTICLES; THEORETICAL DATA; V-A THEORY; VECTOR CURRENTS
Descriptors DEC
ALGEBRAIC CURRENTS; BOSONS; CURRENTS; DATA; DECAY; ELECTRICAL PROPERTIES; ELEMENTARY PARTICLES; EQUATIONS; FERMIONS; FUNCTIONS; HADRONS; HEAVY LEPTONS; INFORMATION; LEPTONS; MATHEMATICS; MESONS; NUMERICAL DATA; PARTICLE DECAY; PHYSICAL PROPERTIES; PSEUDOSCALAR MESONS; SPECTRAL FUNCTIONS; WEAK PARTICLE DECAY