τ hadronic spectral function moments in a nonpower QCD perturbation theory

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F16%3A00540680" target="_blank" >RIV/68378271:_____/16:00540680 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1016/j.nuclphysbps.2015.10.061" target="_blank" >http://dx.doi.org/10.1016/j.nuclphysbps.2015.10.061</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.nuclphysbps.2015.10.061" target="_blank" >10.1016/j.nuclphysbps.2015.10.061</a>

Result language

angličtina

Original language name

τ hadronic spectral function moments in a nonpower QCD perturbation theory

Original language description

The moments of the hadronic spectral functions are of interest for the extraction of the strong coupling and other QCD parameters from the hadronic decays of the τ lepton. We consider the perturbative behavior of these moments in the framework of a QCD nonpower perturbation theory, defined by the technique of series acceleration by conformal mappings, which simultaneously implements renormalization-group summation and has a tame large-order behavior. Two recently proposed models of the Adler function are employed to generate the higher order coefficients of the perturbation series and to predict the exact values of the moments, required for testing the properties of the perturbative expansions. We show that the contour-improved nonpower perturbation theories and the renormalization-group-summed nonpower perturbation theories have very good convergence properties for a large class of moments of the so-called “reference model”.n

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

—

OECD FORD branch

10301 - Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

Nuclear and Particle Physics Proceedings

ISBN

—

ISSN

2405-6014

e-ISSN

—

Number of pages

3

Pages from-to

2777-2779

Publisher name

Elsevier Science BV

Place of publication

Amsterdam

Event location

Valencie

Event date

Jul 2, 2014

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

000390295200525