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ChPT parameters from τ-decay data

Rodríguez-Sánchez, A. LU ; González-Alonso, M. and Pich, A. (2016) In Nuclear and Particle Physics Proceedings 270-272. p.108-112
Abstract

Using the updated ALEPH V-. A spectral function from τ decays, we determine the lowest spectral moments of the left-right correlator and extract dynamical information on order parameters of the QCD chiral symmetry breaking. Uncertainties associated with violations of quark-hadron duality are estimated from the data, imposing all known short-distance constraints on a resonance-based parametrization. Employing proper pinched weight functions, we obtain an accurate determination of the effective chiral couplings L10eff and C8eff7 and the dimension-six and -eight contributions in the Operator Product Expansion.

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author
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Chiral perturbation theory, Operator product expansion, Sum rules, τ decays
in
Nuclear and Particle Physics Proceedings
volume
270-272
pages
5 pages
publisher
Elsevier
external identifiers
  • scopus:84962090267
ISSN
2405-6014
DOI
10.1016/j.nuclphysbps.2016.02.023
language
English
LU publication?
no
id
5e217832-088c-4e0d-af0a-a64d528c8e5e
date added to LUP
2019-05-14 14:02:53
date last changed
2019-08-01 11:00:31
@article{5e217832-088c-4e0d-af0a-a64d528c8e5e,
  abstract     = {<p>Using the updated ALEPH V-. A spectral function from τ decays, we determine the lowest spectral moments of the left-right correlator and extract dynamical information on order parameters of the QCD chiral symmetry breaking. Uncertainties associated with violations of quark-hadron duality are estimated from the data, imposing all known short-distance constraints on a resonance-based parametrization. Employing proper pinched weight functions, we obtain an accurate determination of the effective chiral couplings L10eff and C8eff7 and the dimension-six and -eight contributions in the Operator Product Expansion.</p>},
  author       = {Rodríguez-Sánchez, A. and González-Alonso, M. and Pich, A.},
  issn         = {2405-6014},
  language     = {eng},
  month        = {01},
  pages        = {108--112},
  publisher    = {Elsevier},
  series       = {Nuclear and Particle Physics Proceedings},
  title        = {ChPT parameters from τ-decay data},
  url          = {http://dx.doi.org/10.1016/j.nuclphysbps.2016.02.023},
  doi          = {10.1016/j.nuclphysbps.2016.02.023},
  volume       = {270-272},
  year         = {2016},
}