Isospin odd pi K scattering length

Details Isospin odd pi K scattering length Isospin odd pi K scattering length

2005-07-28

arxiv.org/abs/hep-ph/0507323v1

Phys.Lett.B625:217-224,2005

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages

Scientific paper

10.1016/j.physletb.2005.08.058

We make use of the chiral two-loop representation of the pi K scattering amplitude [J. Bijnens, P. Dhonte and P. Talavera, JHEP 0405 (2004) 036] to investigate the isospin odd scattering length at next-to-next-to-leading order in the SU(3) expansion. This scattering length is protected against contributions of m_s in the chiral expansion, in the sense that the corrections to the current algebra result are of order M_pi^2. In view of the planned lifetime measurement on pi K atoms at CERN it is important to understand the size of these corrections.

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