ChPT parameters from τ-decay data
(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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https://lup.lub.lu.se/record/5e217832-088c-4e0d-af0a-a64d528c8e5e
- author
- Rodríguez-Sánchez, A. LU ; González-Alonso, M. and Pich, A.
- publishing date
- 2016-01-01
- 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
- 2022-01-31 19:55:36
@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}}, }