Abstract

Measurements of differential cross sections for pion-nucleon charge exchange, π-p→π0n, in the region of the P11(1440), or Roper, resonance are presented. These data were obtained as part of the baryon spectroscopy program using the Crystal Ball detector at the Alternating Gradient Synchrocyclotron (AGS) at Brookhaven National Laboratory (BNL). Data were taken in 1998 with a liquid hydrogen target and in 2002 with CH 2 and C targets.

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