HAL : in2p3-00150307, version 1

arXiv : hep-ph/0310134

DOI : 10.1016/j.physletb.2004.05.009

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Physics Letters B 594 (2004) 76-86

A phenomenological negatively charged pion-proton scattering length from pionic hydrogen

T.E.O. Ericson, B. Loiseau1, S. Wycech

(2004)

We derive a closed, model independent, expression for the electromagnetic correction factor to a phenomenological hadronic scattering length extracted from a hydrogenic atom. It is obtained in a non-relativistic approach and in the limit of a short ranged hadronic interaction to terms of order ((alpha)**2)(log(alpha)) using an extended charge distribution. A hadronic negatively charged pion-proton scattering length of 0.0870(5), in units of inverse charged pion-mass, is deduced, leading to a pion-nucleon coupling constant from the GMO relation equals to 14.04(17).

1 :	LPNHE - Laboratoire de Physique Nucléaire et de Hautes Énergies

Thème(s)

:

Physique/Physique des Hautes Energies - Phénoménologie Physique/Physique Nucléaire Théorique

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Contributeur : Dominique Girod <>

Soumis le : Mercredi 30 Mai 2007, 09:39:31

Dernière modification le : Mercredi 30 Mai 2007, 10:32:31