Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2009-11-17
Nucl.Phys.A835:337-341,2010
Physics
High Energy Physics
High Energy Physics - Phenomenology
To appear in HypX Proceedings
Scientific paper
10.1016/j.nuclphysa.2010.01.213
The development of chiral perturbation theory in hyperon phenomenology has been troubled due to power-counting subtleties and to a possible slow convergence. Furthermore, the presence of baryon-resonances, e.g. the lowest-lying decuplet, complicates the approach, and the inclusion of their effects may become necessary. Recently, we have shown that a fairly good convergence is possible using a renormalization prescription of the loop-divergencies which recovers the power counting, is covariant and consistent with analyticity. Moreover, we have systematically incorporated the decuplet resonances taking care of both power-counting and $consistency$ problems. A model-independent understanding of diferent properties including the magnetic moments of the baryon-octet, the electromagnetic structure of the decuplet resonances and the hyperon vector coupling $f_1(0)$, has been successfully achieved within this approach. We will briefly review these developments and stress the important role they play for an accurate determination of the Cabibbo-Kobayashi-Maskawa matrix element $V_{us}$ from hyperon semileptonic decay data.
Alvarez-Ruso Luis
Camalich Martin J.
Geng Li Sheng
Vicente Vacas M. J.
No associations
LandOfFree
Properties of hyperons in chiral perturbation theory 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 Properties of hyperons in chiral perturbation theory, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Properties of hyperons in chiral perturbation theory will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-240109