Very backward π0 and η0 production by proton projectiles on a deuterium target at intermediate energies

Berthet, P.; Frascaria, R.; Didélez, J. P.; Perdrisat, C. F.; Pignault, G.; Banaigs, J.; Berger, J.‐P.; Goldzahl, L.; Plouin, F.; Fabbri, F. L.; Picozza, P.; Satta, L.; Boivin, M.; Yonnet, Jean‐Paul

doi:10.1016/0375-9474(85)90215-5

Cited by 56 publications

(39 citation statements)

References 13 publications

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“…[14] at kinetic energy of pion 37 MeV, σ = 2.4 ± 0.7 mb, is comparable with that for the reaction π 0 3 He → dp, σ = 1.3 mb, recalculated here from the pd → 3 He π 0 data [20] for the corresponding proton beam energy T p = 262…”

Section: Approximated Evaluation Of C Imentioning

confidence: 53%

3Hestructure and mechanisms ofp3Hebackward el

Uzikov

Haidenbauer

2003

Phys. Rev. C

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The mechanism of p 3 He backward elastic scattering is studied. It is found that the triangle diagrams with the subprocesses pd → 3 He π 0 , pd * → 3 He π 0 and p(pp) → 3 He π + , where d * and pp denote the singlet deuteron and diproton pair in the 1 S 0 state, respectively, dominate in the cross section at 0.3-0.8 GeV, and their contribution is comparable with that for a sequential transfer of a np pair at 1-1.5 GeV. The contribution of the d * + pp, estimated on the basis of the spectator mechanism of the p(N N ) → 3 He π reaction, increases the p 3 He→ 3 He p cross section by one order of magnitude as compared to the contribution of the deuteron alone. Effects of the initial and final states interaction are taken into account.

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Section: Approximated Evaluation Of C Imentioning

confidence: 53%

3Hestructure and mechanisms ofp3Hebackward el

Uzikov

Haidenbauer

2003

Phys. Rev. C

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“…Two runs were made where the first run called run A suffered from unfavourable beam conditions. The present data were complemented by two points from the literature [25,26]. The peak to background ratio is typically 2 to 1.…”

Section: Resultsmentioning

confidence: 99%

Meson production in p + d reactions

et al. 2001

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Total and differential cross sections for the reactions Ô · ¿ He · Ñ ¼ with Ñ and Ô · ¿ H· · were measured with the GEM detector at COSY for beam momenta between threshold and the maximum of the corresponding baryon resonance. For both reactions a strong forward-backward asymmetry was found. The data were compared with model calculations. The aspect of isospin symmetry breaking is studied.

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“…38. The data in the backward direction (the two-nucleon transfer region) are strongly suppressed and the cross section here falls very rapidly with incident beam energy [240]. Figure 37: Total cross section for the unpolarized pd(dp) → 3 He η reaction as a function of the excess energy.…”

Section: The Unpolarized Pd → 3 He η Reactionmentioning

confidence: 97%

“…There have been numerous measurements of the pd → 3 He η reaction at low energies over the last 30 years, where the 3 He nucleus was detected and the η meson identified through the missing mass in the reaction [181,182,239,240,241,242,243,244,245,246,247,248]. The statistical precision is generally reasonable but the systematic uncertainties, mainly associated with the overall normalization, range from about 7% in the Saclay measurement [243] up to twice that in most of the other data, except for the large errors at COSY-11 [246].…”

Section: The Unpolarized Pd → 3 He η Reactionmentioning

confidence: 99%

Production of η and η′ mesons on nucleons and nuclei

Krusche¹,

Wilkin²

2015

Progress in Particle and Nuclear Physics

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The production of η and η mesons in photon-and hadron-induced reactions on free and quasifree nucleons and on nuclei is reviewed. The extensive database on γN → ηN , for both proton and neutron targets, is described in detail and its implications for the search for N resonances much heavier than the dominant S 11 (1535) discussed. Though less is currently known about the production of the η or of ηπ pairs, these also offer tantalizing prospects in the search for the missing isobars. The more limited data available on pion-induced production are still necessary ingredients in the partial wave analysis discussed.The production of the η-meson in pp and pn collisions shows once again the strong influence of the S 11 (1535) isobar, which is in contrast to the relatively weak behaviour seen near threshold for η production. This difference is reflected in the important final state interaction effects of the η in nuclei that may even lead to this meson being "bound" in some systems. The evidence for this is reviewed for both γA and pA collisions. The inclusive photoproduction of η, η , and ηπ pairs from nuclei provides further information regarding the production mechanism and the interaction of the η and η with nuclei and the ηπ pairs may even allow access to low mass ηA systems that are forbidden in direct single-meson photoproduction.

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Very backward π0 and η0 production by proton projectiles on a deuterium target at intermediate energies

Cited by 56 publications

References 13 publications

3Hestructure and mechanisms ofp3Hebackward el

3Hestructure and mechanisms ofp3Hebackward el

Meson production in p + d reactions

Production of η and η′ mesons on nucleons and nuclei

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