Exclusive near threshold two-pion production with the MOMO experiment at COSY

Bavink, S.; Bellemann, F.; Berg, A.E. van den; Bisplinghoff, J.; Bohlscheid, G.; Ernst, J.; Henrich, C.; Hinterberger, F.; Ibald, R.; Jahn, R.; Jarczyk, L.; Joosten, R.; Kozela, A.; Machner, H.; Magiera, A.; Maschuw, R.; Mayer-Kuckuk, Theo; Mertler, G.; Munkel, J.; Neumann‐Cosel, P. von; Rosendaal, D.; Rossen, P. von; Schnitker, H.; Scho, K.; Smyrski, J.; Strzalkowski, A.; Tölle, R.; Wurzinger, R.

doi:10.1016/s0375-9474(98)00064-5

Cited by 2 publications

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“…As mentioned in the Introduction, the present model could provide an explanation to the deviation from phase space observed in the two pion invariant mass distribution of the reaction pd → 3 Heπ + π − , studied with a proton beam of momentum p p = 1.15 GeV [17]. This experimental result has been inter-preted with the hypothesis that the pions are preferably emitted in p-wave [27].…”

Section: Resultsmentioning

confidence: 56%

“…From this comparison, the authors concluded [14] that neither double-∆ formation nor double-nucleon exchange provides the appropriate description of the reaction at p n = 1.46 GeV. A similar enhancement has also been observed for the reaction pd → 3 Heπ + π − , which is being studied using a beam of protons from COSY ( MOMO experiment ) [17], at a Q value close to the one of the experiment by Hollas et al [14]. These common features point to a common dynamical description.…”

Section: Introductionmentioning

confidence: 63%

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The role of the Roper resonance in np→d(ππ)0

Alvarez‐Ruso

1999

Physics Letters B

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In this work, a model for the np → d(ππ) 0 reaction is developed. It is shown that the structure of the deuteron momentum spectra for a neutron beam momentum of 1.46 GeV can be explained as a consequence of the interplay of two mechanisms involving the excitation of the N * (1440) resonance and its subsequent decay into N (ππ) T =0 S−wave and ∆π respectively. The relevance of the present analysis for the study of the Roper excitation and decay properties, as well as for the interpretation of other two-pion production experiments is discussed.

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Section: Resultsmentioning

confidence: 56%