Towards a determination of the chiral couplings at NLO in 1/N(C): L_8(mu) and C_38(mu)

Details Towards a determination of the chiral couplings at NLO in 1/N(C): L_8(mu) and C_38(mu) Towards a determination of the chiral couplings at NLO in 1/N(C): L_8(mu) and C_38(mu)

2006-10-23

arxiv.org/abs/hep-ph/0610290v2

JHEP 0701:039,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

Extended version published at JHEP01(2007)039. A NLO prediction for the O(p6) chiral coupling C_38 has been added. The origina

Scientific paper

10.1088/1126-6708/2007/01/039

We present a dispersive method which allows to investigate the low-energy couplings of chiral perturbation theory at the next-to-leading order (NLO) in the 1/N(C) expansion, keeping full control of their renormalization scale dependence. Using the resonance chiral theory Lagrangian, we perform a NLO calculation of the scalar and pseudoscalar two-point functions, within the single-resonance approximation. Imposing the correct QCD short-distance constraints, one determines their difference Pi(t)=Pi_S(t)-Pi_P(t) in terms of the pion decay constant and resonance masses. Its low momentum expansion fixes then the low-energy chiral couplings L_8 and C_38. At mu_0=0.77 GeV, we obtain L_8(mu_0)^{SU(3)} = (0.6+-0.4)10^{-3} and C_{38}(mu_0)^{SU(3)}=(2+-6)10^{-6}.

Affiliated with

Also associated with

No associations

Rating

Towards a determination of the chiral couplings at NLO in 1/N(C): L_8(mu) and C_38(mu) does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Towards a determination of the chiral couplings at NLO in 1/N(C): L_8(mu) and C_38(mu), we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Towards a determination of the chiral couplings at NLO in 1/N(C): L_8(mu) and C_38(mu) will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-277092