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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
; and
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
2025-04-04 15:19:50
@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}},
  keywords     = {{Chiral perturbation theory; Operator product expansion; Sum rules; τ decays}},
  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}},
}