Complete set of polarization observables in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mrow><mml:mover><mml:mrow><mml:mi>p</mml:mi></mml:mrow><mml:mrow><mml:mo>→</mml:mo></mml:mrow></mml:mover></mml:mrow></mml:mrow><mml:mrow><mml:mrow><mml:mover><mml:mrow><mml:mi>p</mml:mi></mml:mrow><mml:mrow><mml:mo>→</mml:mo></mml:mrow></mml:mover></mml:mrow></mml:mrow><mml:mo>→</mml:mo><mml:mi>pp</mml:mi><mml:mrow><mml:msup><mml:mrow><mml:mi>π</mml:mi></mml:mrow><mml:mrow><m

Meyer, H. O.; Wellinghausen, A.; Balewski, J. T.; Doskow, J.; Pollock, R.E.; Przewoski, B. von; Rinckel, T.; Thörngren-Engblom, P.; Knutson, L. D.; Haeberli, W.; Lorentz, B.; Rathmann, F.; Schwartz, B.; Wise, T.; Daehnick, W. W.; Saha, Swapan K.; Pancella, P. V.

doi:10.1103/physrevc.63.064002

Cited by 57 publications

(38 citation statements)

References 38 publications

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“…Investigations with polarized beams and targets (Meyer et al, 1999(Meyer et al, , 2001) of the p p → ppπ 0 reaction tell us that the Ss partial-wave accounts for more than 95 % of the total cross section up to η M ≈ 0.4. Extending this phenomenology to heavy mesons suggests that the Ss partial wave combination will constitute the overwhelming fraction of the total production cross-section for η M smaller than about 0.4 for constant production amplitudes |M 0 Ll |.…”

Section: η-And η -Nucleon Interactionsmentioning

confidence: 99%

η′ and η mesons with connection to anomalous glue

Bass

Moskal

2019

Rev. Mod. Phys.

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We review the present understanding of η and η meson physics and these mesons as a probe of gluon dynamics in low-energy QCD. Recent highlights include the production mechanism of η and η mesons in proton-nucleon collisions from threshold to high-energy, the η effective mass shift in the nuclear medium, searches for possible η and η bound states in nuclei as well as precision measurements of η decays as a probe of light-quark masses. We discuss recent experimental data, theoretical interpretation of the different measurements and the open questions and challenges for future investigation.

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Section: η-And η -Nucleon Interactionsmentioning

confidence: 99%

η′ and η mesons with connection to anomalous glue

Bass

Moskal

2019

Rev. Mod. Phys.

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“…The work was partially supported by the European Community-Research Infrastructure Activity under the FP6 and which corresponds to ∼1 MeV uncertainty in Q. 5 The transition between angular momentum combinations of the initial and final states are described according to the conventional notation [31] in the following way:…”

Section: Acknowledgementsmentioning

confidence: 99%

Measurement of the invariant mass distributions for the reaction at excess energy of

et al. 2010

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The proton-proton and proton-η ′ invariant mass distributions have been determined for the pp → ppη ′ reaction at an excess energy of Q = 16.4 MeV. The measurement was carried out using the COSY-11 detector setup and the proton beam of the cooler synchrotron COSY. The shapes of the determined invariant mass distributions are similar to those of the pp → ppη reaction and reveal an enhancement for large relative proton-proton momenta. This result, together with the fact that the proton-η interaction is much stronger that the proton-η ′ interaction, excludes the hypothesis that the observed enhancement is caused by the interaction between the proton and the meson.

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“…Certainly, most effectively, contributions from higher partial waves could be disentangled by the determination of the analysing powers and spin transition coefficients [10,13,14], yet such investigations are not planned in the near future at COSY which is at present the only laboratory where it can be conducted. This makes the determination of the energy dependence of the distributions of the differential cross section for the pp → ppη reaction even more important for studies of the proton-η hadronic interaction and for studies of the properties of nucleon resonances [9,15].…”

Section: Introductionmentioning

confidence: 99%

Invariant-mass distributions for the pp $ \rightarrow$ pp$ \eta$ reaction at Q = 10 MeV

et al. 2009

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Proton-proton and proton-η invariant mass distributions and the total cross section for the pp → ppη reaction have been determined near the threshold at an excess energy of Q = 10 MeV. The experiment has been conducted using the COSY-11 detector setup and the cooler synchrotron COSY. The determined invariant mass spectra reveal significant enhancements in the region of low proton-proton relative momenta, similarly as observed previously at higher excess energies of Q = 15.5 MeV and Q = 40 MeV.PACS. 13.60.Le Meson production -13.85.Lg Total cross sections -29.20.D-Cyclic accelerators and storage rings

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Complete set of polarization observables inp→p→→ppπ

Cited by 57 publications

References 38 publications

η′ and η mesons with connection to anomalous glue

η′ and η mesons with connection to anomalous glue

Measurement of the invariant mass distributions for the reaction at excess energy of

Invariant-mass distributions for the pp $ \rightarrow$ pp$ \eta$ reaction at Q = 10 MeV

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