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- W3121680689 abstract "Using the resonance chiral theory Lagrangian, we perform a calculation of the vector and axial-vector two-point functions at the next-to-leading order (NLO) in the 1/NC expansion. We have analyzed these correlators within the single-resonance approximation and have also investigated the corrections induced by a second multiplet of vector and axial-vector resonance states. Imposing the correct QCD short-distance constraints, one determines the difference of the two correlators Π(t) ≡ ΠVV(t)−ΠAA(t) in terms of the pion decay constant and resonance masses. Its low momentum expansion fixes then the low-energy chiral couplings L10 and C87 at NLO, keeping full control of their renormalization scale dependence. At μ0 = 0.77 GeV, we obtain L10r(μ0) = (−4.4±0.9) · 10−3 and C87r(μ0) = (3.1±1.1) · 10−5." @default.
- W3121680689 created "2021-02-01" @default.
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- W3121680689 date "2008-07-02" @default.
- W3121680689 modified "2023-10-09" @default.
- W3121680689 title "Form-factors and current correlators: chiral couplings<i>L</i><sub>10</sub><sup><i>r</i></sup>(μ) and<i>C</i><sub>87</sub><sup><i>r</i></sup>(μ) at NLO in 1/<i>N</i><sub><i>C</i></sub>" @default.
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- W3121680689 doi "https://doi.org/10.1088/1126-6708/2008/07/014" @default.
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