Abstract
A partial wave analysis of the π0π0 system produced in the charge exchange reaction π−p→π0π0n at an incident momentum of 18.3 GeV/c is presented as a function of the π0π0 invariant mass mπ0π0 and momentum transfer squared |t| from the incident π− to the outgoing π0π0 system. For small values of |t|, the S-wave intensity shows a broad enhancement at low mπ0π0 with a sharp dip in the vicinity of the f0(980). A dip is also observed in the vicinity of the f0(1500). There is a rapid variation of the S to D0 relative phase difference in these mass regions. For large values of |t|, the f0(980) appears as a bump. The f2(1270), observed in D waves, is produced dominantly by π exchange at low values of |t| and a2 exchange at higher values of |t|.Received 12 January 2000DOI:https://doi.org/10.1103/PhysRevD.64.072003©2001 American Physical Society
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