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.
Please use this url to cite or link to this publication:
http://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
- 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}, }