Journal article

pi ->pi pi results in nuclei

P Camerini, E Fragiacomo, N Grion, R Rui, JT Brack, EF Gibson, GJ Hofman, EL Mathie, R Meier, K Raywood, ME Sevior, GR Smith, R Tacik

PHYSICAL REVIEW C | AMER PHYSICAL SOC | Published : 2001

Abstract

The Crystal Ball (CB) Collaboration at Brookhaven National Laboratory has recently presented results regarding a study of the π-A→π0π0A′reaction on H, D, C, Al, and Cu, using a nearly 4π detector. Similar results, but for the π+A→π+π±A′ reaction on 2H, 12C, 40Ca, and 208Pb, have been published earlier by the CHAOS Collaboration at TRIUMF. In this Brief Report a comparison of the results of the two measurements is made, which shows that the CHAOS and CB data share relevant common features. In particular, the increase in strength as a function of A seen in the near-threshold π+π- invariant mass spectra reported by the CHAOS group is also seen in the π0π0 CB data, when the results from the two ..

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