Johan Bijnens and Pierre-Antoine Dhonte
Scalar Form Factors in SU(3) Chiral Perturbation Theory
Submitted to The Journal of High Energy Physics

Abstract
The scalar form factors for the pions and kaons are calculated in SU(3) Chiral Perturbation Theory at order p⁶, in the isospin limit m_u =m_d=m^{^}. We find in general sizable corrections of O(p⁶). We use our results to obtain results on the 1/N_c suppressed low energy constants L₄^r and L₆^r as well as on two O(p⁶) low energy constants. We present some numerical results for masses and decay constants as well. We derive a relation for the scalar form factors analogous to Sirlin's relation for vector form factors.

LU TP 03-32