English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Using the resonance chiral theory Lagrangian, we perform a calculation of thevector and axial-vector two-point functions at the next-to-leading order (NLO)in the 1/N(C) expansion. We have analyzed these correlators within thesingle-resonance approximation and have also investigated the correctionsinduced by a second multiplet of vector and axial-vector resonance states.Imposing the correct QCD short-distance constraints, one determines thedifference of the two correlators Pi(t) = Pi_VV(t)- Pi_AA(t) in terms of thepion decay constant and resonance masses. Its low momentum expansion fixes thenthe low-energy chiral couplings L_10 and C_87 at NLO, keeping full control oftheir renormalization scale dependence. At mu_0=0.77 GeV, we obtain L_10(mu_0)= (-4.4 \pm 0.9)10^{-3} and C_87^r(mu_0)=(3.1 \pm 1.1)10^{-5}.

Form-factors and current correlators: chiral couplings L_10(mu) and C_87(mu) at NLO in 1/N(C)