Moreno, M.
Pestieau, Jean
[UCL]
Urias, J.
Low's theorem is deduced from the Born diagrams for pi /sup + / production by imposing electromagnetic current conservation (ECC), but the anomalous electric quadrupole moment contribution could be very important even at threshold. The derivation of the Kroll-Ruderman and Fubini-Furlan-Rossetti theorems is made consistent with ECC and Low's theorem in contrast to previous works where these are violated. A discussion of information obtainable from experiment shows that soft pion results cannot be used directly but an extrapolation from q/sup 2/=0 to m pi /sup 2/ is given which is compatible with ECC and Low's theorem.
Référence bibliographique |
Moreno, M. ; Pestieau, Jean ; Urias, J.. Pion photoproduction at threshold on /sup 6/Li and low-energy theorems. In: Physical Review C (Nuclear Physics), Vol. 12, no. 2, p. 514-522 (1975) |
Permalien |
http://hdl.handle.net/2078.1/66706 |