Violation of quark-hadron duality and spectral chiral moments in QCD
NAGIOS: RODERIC FUNCIONANDO

Violation of quark-hadron duality and spectral chiral moments in QCD

Repositori DSpace/Manakin

Violation of quark-hadron duality and spectral chiral moments in QCD

Mostra el registre complet de l'element

Visualització       (265.7Kb)

Exportar a Refworks
    
González Alonso, Martín; Pich Zardoya, Antonio Perfil; Prades Hernández, Joaquim
Aquest document és un/a article, creat/da en: 2010
We analyze the spectral moments of the V-A two-point correlation function. Using all known short-distance constraints and the most recent experimental data from tau decays, we determine the lowest spectral moments, trying to assess the uncertainties associated with the so-called violations of quark-hadron duality. We have generated a large number of 'acceptable' spectral functions, satisfying all conditions, and have used them to extract the wanted hadronic parameters through a careful statistical analysis. We obtain accurate values for the ChPT couplings L10 and C87, and a realistic determination of the dimension six and eight contributions in the operator product expansion, O6=(-5.4^{+3.6}_{-1.6})*10^-3 GeV^6 and O8=(-8.9^{+12.6}_{-7.4})*10^-3 GeV^8, showing that the duality-violation effects have been usually underestimated in previous literature.

    González Alonso, Martín Pich Zardoya, Antonio Prades Hernández, Joaquim 2010 Violation of quark-hadron duality and spectral chiral moments in QCD Physical Review D 81 7 074007
http://dx.doi.org/10.1103/PhysRevD.81.074007
distribuït sota llicència Creative Commons de Reconeixement-NoComercial 3.0 No adaptada

Aquest element apareix en la col·lecció o col·leccions següent(s)

Mostra el registre complet de l'element

Cerca a RODERIC

Cerca avançada

Visualitza

Estadístiques