%0 Journal Article
%T Hyperon forward spin polarizability gamma(0) in baryon chiral perturbation theory
%A Hiller Blin, A. N.
%A Gutsche, T.
%A Ledwig, T.
%A Lyubovitskij, V. E.
%J Physical Review D
%D 2015
%V 92
%N 9
%I Amer Physical Soc
%@ 1550-7998
%G English
%F HillerBlin_etal2015
%O WOS:000364020300009
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=2451), last updated on Thu, 29 Sep 2016 10:48:22 +0000
%X We present the calculation of the hyperon forward spin polarizability gamma(0) using manifestly Lorentz-covariant baryon chiral perturbation theory including the intermediate contribution of the spin-3/2 states. As at the considered order the extraction of. 0 is a pure prediction of chiral perturbation theory, the obtained values are a good test for this theory. After including explicitly the decuplet states, our SU(2) results have a very good agreement with the experimental data and we extend our framework to SU(3) to give predictions for the hyperons'. 0 values. Prominent are the Sigma(-) and Xi(-) baryons as their photon transition to the decuplet is forbidden in SU(3) symmetry and therefore they are not sensitive to the explicit inclusion of the decuplet in the theory.
%R 10.1103/PhysRevD.92.096004
%U http://arxiv.org/abs/1509.00955
%U https://doi.org/10.1103/PhysRevD.92.096004
%P 096004-9pp