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Partial wave amplitudes have been extracted from accurate data on pbar + p ->pi + pi by a method which incorporates the theoretical constraints ofanalyticity and crossing symmetry. The resulting solution gives a good fit tothe annihilation data and is also consistent with the wealth of information inthe crossed channel pi + N -> pi + N. The partial wave amplitudes show evidencefor resonances in all partial waves with J < 6, at least one of which, a J = 0+state, (and possibly another with J = 1-) is unlikely to have a simplequark-antiquark structure.Comment: 17 pages, Revtex, 21 postscript figure

physical review. c. nuclear physics/physical review. c, nuclear physics

Partial-wave amplitudes and resonances in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mrow><mml:mover><mml:mrow><mml:mi>p</mml:mi></mml:mrow><mml:mrow><mml:mi>¯</mml:mi></mml:mrow></mml:mover></mml:mrow></mml:mrow><mml:mo>+</mml:mo><mml:mi>p</mml:mi><mml:mo>→</mml:mo><mml:mi>π</mml:mi><mml:mo>+</mml:mo><mml:mi>π</mml:mi></mml:math>

Partial-wave amplitudes and resonances inp¯+p→π+π