Probing the deuteron structure at small NN distances by antiproton-deuteron annihilation

The annihilation p ̄ d→2π −π +p at rest with the proton momentum in the final state ≥400 MeV/c is analysed. Assuming that the deuteron wave function can be represented by the Fock's column consisting of different possible states ( NN, NN ∗ , ΔΔ, NNπ,…) some enhancement in the distribution over...

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Bibliographic Details
Published in:Physics letters. B 1999, Vol.458 (2), p.415-421
Main Authors: Denisov, O.Yu, Kuksa, S.D., Lykasov, G.I.
Format: Article
Language:English
Subjects:
Inelastic proton scattering
Relativistic models
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Summary:The annihilation p ̄ d→2π −π +p at rest with the proton momentum in the final state ≥400 MeV/c is analysed. Assuming that the deuteron wave function can be represented by the Fock's column consisting of different possible states ( NN, NN ∗ , ΔΔ, NNπ,…) some enhancement in the distribution over the invariant mass of the π − π − system in the mass region 1.4–1.5(GeV/ c 2) is predicted. This can be caused by the possible existence of a Δ− Δ component in deuteron. Using this prediction and new experimental data of the OBELIX collaboration (LEAR, CERN) one can estimate the upper limit for this exotic state of the deuteron.
ISSN:0370-2693
1873-2445
DOI:10.1016/S0370-2693(99)00562-6