Elsevier

Physics Letters B

Volume 180, Issue 3, 13 November 1986, Pages 313-318
Physics Letters B

Antiproton annihilations in deuterium at rest into two pions: Evidence for pN bound states near threshold

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Abstract

The charged pion spectra in pd→ππ0ps, ππ+ns have been measured. The Doppler broadening of the pion mom entum due to the spectator neutron recoil is at least a factor of two larger than that due to the proton and in disagreement with that expected from the deuteron wave function. This effect and earlier observations on spectators are well described by assuming narrow NN bound states near threshold.

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This work has been supported in part by the National Science Foundation, Washington, D.C., USA.

1

Permanent address: LeMoyne College, Syracuse, NY 13214, USA.

2

Present address: Department of Radiology, Emory University, Atlanta, GA 30322, USA.

3

Present address: Department of Physics, Brookhaven National Laboratory, Upton, NY 11973, USA.

4

Present address: EP Division, CERN, CH-1211 Geneva 23, Switzerland.

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