Obtaining K from off-shell K 7 r amplitudes

@inproceedings{Bijnens1998ObtainingKF,
  title={Obtaining K from off-shell K 7 r amplitudes},
  author={Johan Bijnens and Elisabetta Pallante and Joaquim Prades},
  year={1998}
}
We properly define off-shell K ~ ~ transition amplitudes and use them to extract information for on-shell K ~ ~'~" amplitudes within Chiral Perturbation Theory. At order p2 in the chiral expansion all three parameters of weak interaction can be determined. At order p4 we are able to fix eleven additional constants out of thirteen contributing to off-shell K ~ ~ transitions, which leaves four undetermined constants in the on-shell K ---, 7rTr amplitudes. All O(p 4) contributions have been… CONTINUE READING

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