Isospin-breaking corrections in the pion-deuteron scattering length

Details Isospin-breaking corrections in the pion-deuteron scattering length Isospin-breaking corrections in the pion-deuteron scattering length

2005-12-11

arxiv.org/abs/nucl-th/0512035v1

Phys.Lett.B639:478-482,2006

Physics

Nuclear Physics

Nuclear Theory

4 pages, 1 postscript figure, uses REVTEX style

Scientific paper

10.1016/j.physletb.2006.07.001

It is shown that isospin-breaking corrections to the pion-deuteron scattering length can be very large, because of the vanishing of the isospin-symmetric contribution to this scattering length at leading order in chiral perturbation theory. We further demonstrate that these corrections can explain the bulk of the discrepancy between the recent experimental data on pionic hydrogen and pionic deuterium. We also give the first determination of the electromagnetic low-energy constant f1.

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