Form-factors and current correlators: chiral couplings L_10(mu) and C_87(mu) at NLO in 1/N(C)
| dc.creator | Pich, A. | |
| dc.creator | Rosell, I. | |
| dc.creator | Sanz-Cillero, J. J. | |
| dc.date | 2008-03-11 | |
| dc.date.accessioned | 2026-07-07T12:24:10Z | |
| dc.date.available | 2026-07-07T12:24:10Z | |
| dc.description | 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/N(C) 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 Pi(t) = Pi_VV(t)- Pi_AA(t) in terms of the pion decay constant and resonance masses. Its low momentum expansion fixes then the low-energy chiral couplings L_10 and C_87 at NLO, keeping full control of their 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}. | |
| dc.identifier | https://arxiv.org/abs/0803.1567 | |
| dc.identifier | http://arxiv.org/abs/0803.1567 | |
| dc.identifier | JHEP 0807:014,2008 | |
| dc.identifier | doi:10.1088/1126-6708/2008/07/014 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/214240 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Form-factors and current correlators: chiral couplings L_10(mu) and C_87(mu) at NLO in 1/N(C) | |
| dc.type | text |