Using chiral perturbation theory to extract the neutron-neutron scattering length from pi- d -> n n gamma

Preprint English OPEN
Gardestig, A.; Phillips, D. R.;
(2005)

The reaction pi- d -> n n gamma is calculated in chiral perturbation theory so as to facilitate an extraction of the neutron-neutron scattering length (a_nn). We include all diagrams up to O(Q^3). This includes loop effects in the elementary pi- p -> gamma n amplitude a... View more
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