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

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dc.creator Pich, Antonio
dc.creator Rosell, Ignasi
dc.creator Sanz-Cillero, Juan José
dc.date 2008-04-17T23:06:56Z
dc.date 2008-04-17T23:06:56Z
dc.date 2008-07-02
dc.date.accessioned 2017-01-31T01:02:29Z
dc.date.available 2017-01-31T01:02:29Z
dc.identifier Journal of High Energy Physics 07: 014 (2008)
dc.identifier http://hdl.handle.net/10261/3638
dc.identifier 10.1088/1126-6708/2008/07/014
dc.identifier.uri http://dspace.mediu.edu.my:8181/xmlui/handle/10261/3638
dc.description 50 páginas, 3 figuras, 5 tablas.-- arXiv:0803.1567v1
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.description This work has been supported by the Spanish Ministry of Education, under grants FPA2007-60323 and CSD2007-00042 (Consolider Project CPAN), and by the EU MRTN-CT-2006-035482 (FLAVIAnet).
dc.description Peer reviewed
dc.format 476283 bytes
dc.format application/pdf
dc.language eng
dc.publisher Institute of Physics Publishing
dc.relation Preprint
dc.relation http://dx.doi.org/10.1088/1126-6708/2008/07/014
dc.rights openAccess
dc.subject QCD
dc.subject Chiral Lagrangians
dc.subject 1/N Expansion
dc.title Form-factors and current correlators: chiral couplings L_10(mu) and C_87(mu) at NLO in 1/N(C)
dc.type Pre-print


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