Measurement of<i>np</i>→<i>pp</i><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="normal">π</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant="normal">−</mml:mi></mml:mrow></mml:msup></mml:mrow></mml:math>at 443 MeV

Bachman, M.; Riley, P. J.; Green, P.W.; Korkmaz, E.; Margaziotis, D. J.; Mayes, B.; Pinsky, L.; Tzamouranis, Y.; Amer, Ahmed Hammad; Berdoz, A.; Bírchall, J.; Campbell, J. R.; Davis, C. A.; Davison, N.E.; Falk, W.R.; Page, S. A.; Ramsay, W. D.; Sekulovitch, A.M.; Oers, W. T. H. van; Adams, T.; Mutchler, G. S.; Hutcheon, D. A.; Miller, C. A.

doi:10.1103/physrevc.52.495

Cited by 13 publications

(17 citation statements)

References 34 publications

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“…In this paper we have presented a fully covariant one-boson exchange model and ω mesons in order to explain the near threshold data on pion production in pp collisions taken recently at the Bloomington cooler cyclotron [8]. It should be noted that a fully covariant calculation is necessary at even these energies because the non-relativistic reduction of the πNN Lagrangian has ambiguities, which cast doubt on the results obtained within such approaches [10,40].…”

Section: Discussionmentioning

confidence: 99%

“…However, with the advent of accelerators capable of producing intense high quality beams of protons with energies up to a few GeV and sophisticated detecting systems, it became possible to obtain good quality data on the charged as well as neutral pion production in proton-nucleon collisions at several beam energies [3,4]. Even the complete kinematical measurements of the three particles in the final state can now be performed [5,6,7,8]. Furthermore, with improved polarisation techniques for beams and targets, the spin observables (asymmetries) are also being measured with great accuracy [6,7].…”

Section: Introductionmentioning

confidence: 99%

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Pion production in proton-proton collisions in a covariant one-boson-exchange model

et al. 1996

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Motivated by the renewed interest in studying the pion production on nuclei with protons at few GeV incident energies, we investigate the pion production in proton-proton collisions over an energy range of 300 M eV to 2 GeV . Starting from a realistic one-boson exchange model with parameters fitted to the amplitudes of the elastic nucleon-nucleon scattering, we perform fully covariant calculations for the total, double and triple differential cross-sections of the p(p, nπ + )p and p(p, pπ 0 )p reactions. The calculations incorporate the exchange of π, ρ, ω and σ mesons and treat nucleon and delta isobar as intermediate states. We obtain a reasonably good agreement with the experimental data in the entire range of beam energies. The form of the covariant delta propagator, the cut-off parameter for the πN N and πN ∆ vertex form factors and the energy dependence of the delta isobar decay width is investigated. * Work supported by GSI, Darmstadt, KFA Jülich and JSPS.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Pion production in proton-proton collisions in a covariant one-boson-exchange model

et al. 1996

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“…New np polarized data have been produced mainly by TRIUMF (101 points) [52,53], IUCF (33 points) [54], and LAMPF (49 points) [55]. The ANL-LAMPF-New Mexico University-Texas A & M University collaboration has finalized its analysis of 311 high quality np polarized observables (A xx , A zz , A yy , and A zx ) between 485 and 790 MeV and ranging from 25…”

Section: The Databasementioning

confidence: 99%

Nucleon-nucleon elastic scattering analysis to 2.5 GeV

et al. 1997

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“…Data on pp → dπ + were provided by the TRIUMF group [6], by the GEM collaboration at COSY in Jülich [7] and by IUCF [8]. Finally, there are measurements on the reactions pn → dπ 0 [9], pn → ppπ − [10], and pp → pnπ + [11]. Many of the data are taken at values of η (the maximum center-of-mass momentum of the produced pion divided by the pion mass, q π max /m π ) below 0.5.…”

Section: Introductionmentioning

confidence: 99%

Near Threshold Meson Production in Nucleon-Nucleon Collisions

Haidenbauer

Baru

Hanhart³

et al. 2003

Nuclear Dynamics: From Quarks to Nuclei

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A brief overview on recent model calculations for near threshold pion production in nucleon-nucleon collisions is given. Results from our own investigations of the reactions pp → ppπ 0 and pn → dπ 0 are presented. Direct production, heavy meson exchange and pion rescattering are taken into account. For the latter a T-matrix obtained from a microscopic model of the πN interaction is employed. We obtain a significant contribution from rescattering, but not enough to describe the data for pp → ppπ 0 . The missing production rate can be provided by heavy meson exchanges. For the first time the effect of off-shell rescattering is investigated for the reaction pn → dπ 0 . Isoscalar rescattering in combination with isovector rescattering is able to describe the s-wave production data. We confirm that heavy meson exchanges are negligible in this reaction.

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Measurement ofnp→ppπ−at 443 MeV

Cited by 13 publications

References 34 publications

Pion production in proton-proton collisions in a covariant one-boson-exchange model

Pion production in proton-proton collisions in a covariant one-boson-exchange model

Nucleon-nucleon elastic scattering analysis to 2.5 GeV

Near Threshold Meson Production in Nucleon-Nucleon Collisions

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