Observation of an A3- Amplitude Phase Change
Abstract
A spin and parity decomposition is presented of the (π+π+π-) final state formed opposite a proton by incident 13-GeV/c π+ mesons. The A3 enhancement is identified as the 2- amplitude decaying to f0π+ via an S wave. A change in relative phase is noted between the 2-S amplitude and the other principal contributions; this is not incompatible with analyses of the (3π)- system. The method employs the University of Illinois three-body partialwave analysis program.
- Publication:
-
Physical Review Letters
- Pub Date:
- February 1974
- DOI:
- 10.1103/PhysRevLett.32.331
- Bibcode:
- 1974PhRvL..32..331T