Antiproton annihilations in deuterium at rest into two pions: Evidence for pN bound states near threshold期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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

Affiliation:	1. Syracuse University, Syracuse, NY 13210, USA;2. Brookhaven National Laboratory, Upton, NY 19973, USA;3. Case Western Reserve University, Cleveland, OH 44106, USA;4. University of Maryland, College Park, MD 20742, USA;5. Columbia University, New York, NY 10027, USA;1. Instituto de Física Teórica UAM/CSIC and Departamento de Física Teórica, Universidad Autónoma de Madrid, Cantoblanco, E-28049 Madrid, Spain;2. The Oskar Klein Centre for Cosmoparticle Physics, Department of Physics, Stockholm University, AlbaNova University Center, SE-106 91 Stockholm, Sweden

Abstract:	The charged pion spectra in $p$ d→π⁻π⁰p_s, π⁻π⁺n_s 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 $N$ N bound states near threshold.

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