The κ resonance in s wave πK scatterings

ec 2 00 3 The κ resonance in s wave πK scatterings

O ct 2 00 3 The κ resonance in s wave πK scatterings

ar X iv : h ep - p h / 03 10 29 3 v 1 2 6 O ct 2 00 3 The κ resonance in s wave πK scatterings

M ar 2 00 6 An improved study to the s wave πK elastic scatterings and the kappa resonance

An improved study to the s wave πK elastic scatterings and the kappa resonance Abstract We point out that the dispersion relation for the left hand cut integral presented in one of our previous paper (Nucl. Phys. A733(2004)235) is actually free of subtraction constant, even for unequal mass elastic scatterings. A new fit to the LASS data is performed and we find a κ pole with M κ = 694 ± 53M eV...

Low - energy ππ and πK scatterings revisited in three - flavour resummed chiral perturbation theory

Low-energy ππ and πK scatterings revisited in three-flavour resummed chiral perturbation theory 1 Abstract Chiral symmetry breaking may exhibit significantly different patterns in two chiral limits: N f = 2 massless flavours (m u = m d = 0, m s physical) and N f = 3 massless flavours (m u = m d = 0 = m s = 0). Such a difference may arise due to vacuum fluctuations of s¯ s pairs related to the v...