Dispersive calculation of B_7^{3/2} and B_8^{3/2} in the chiral limit

Details Dispersive calculation of B_7^{3/2} and B_8^{3/2} in the chiral limit Dispersive calculation of B_7^{3/2} and B_8^{3/2} in the chiral limit

1999-11-11

arxiv.org/abs/hep-ph/9911309v1

Phys.Lett. B478 (2000) 172-184

Physics

High Energy Physics

High Energy Physics - Phenomenology

16 pages, 1 figure

Scientific paper

10.1016/S0370-2693(00)00239-2

We show how the isospin vector and axialvector current spectral functions rho_V and rho_A can be used to determine in leading chiral order the low energy constants B_7^{3/2} and B_8^{3/2}. This is accomplished by matching the Operator Product Expansion to the dispersive analysis of vacuum polarization functions. The data for the evaluation of these dispersive integrals has been recently enhanced by the ALEPH measurement of spectral functions in tau decay, and we update our previous phenomenological determination. Our calculation yields in the NDR renormalization scheme and at renormalization scale mu = 2 GeV the values B_7^{3/2} = 0.55 +- 0.07 +- 0.10 and B_8^{3/2} = 1.11 +- 0.16 +- 0.23 for the quark mass values m_s + m = 0.1 GeV.

Affiliated with

Also associated with

No associations

Rating

Dispersive calculation of B_7^{3/2} and B_8^{3/2} in the chiral limit 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 Dispersive calculation of B_7^{3/2} and B_8^{3/2} in the chiral limit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dispersive calculation of B_7^{3/2} and B_8^{3/2} in the chiral limit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-587109