Measurement of the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"><mml:mi>d</mml:mi><mml:mi>p</mml:mi><mml:mo>→</mml:mo><mml:mspace width="0.2em" /><mml:mmultiscripts><mml:mi mathvariant="normal">He</mml:mi><mml:mprescripts /><mml:none /><mml:mn>3</mml:mn></mml:mmultiscripts><mml:mi>η</mml:mi></mml:math> reaction near threshold

Smyrski, J.; Adam, H.-H.; Budzanowski, A.; Czerwiński, E.; Czyzykiewicz, R.; Gil, Damian Tomasz; Grzonka, D.; Janusz, M.; Jarczyk, L.; Kamys, B.; Khoukaz, A.; Klaja, P.; Mersmann, T.; Moskal, P.; Oelert, W.; Piskor-Ignatowicz, C.; Przerwa, J.; Rejdych, B.; Ritman, J.; Rożek, T.; Sefzick, T.; Siemaszko, M.; Täschner, A.; Winter, P.; Wolke, M.; Wüstner, P.; Zipper, W.

doi:10.1016/j.physletb.2007.04.021

Cited by 93 publications

(96 citation statements)

References 27 publications

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“…This is in agreement with a precision determination of the beam momentum at 1930 MeV/c, where the beam momentum was found to be 2 MeV/c lower than its nominal value [115]. COSY 11 [111] applied Eq. (30) to their data and obtained…”

Section: The Reaction D + P → 3 He+ηsupporting

confidence: 82%

“…Intensive studies were dedicated esp. to the p + d → η+ 3 He reaction [111], [112], [130]. It turns out that the new data do not fully agree with each other and that still not enough observables are known to extract the s wave amplitudes.…”

Section: Discussionmentioning

confidence: 99%

“…Data are from Refs. [106], [107], [108], [109], [110], [111], [112]. Those close to threshold are shown in Fig.…”

Section: The Reaction D + P → 3 He+ηmentioning

confidence: 98%

“…Here we will ignore the data sets which are completely different to the bulk of data. COSY 11 [111], quoted also as Smyrski, and ANKE [112], quoted also as Mersmann, measured at COSY applying the internal deuteron beam. The momentum of the beam increased linearly with time.…”

Section: The Reaction D + P → 3 He+ηmentioning

confidence: 99%

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Search for quasi boundηmesons

Machner

2015

J. Phys. G: Nucl. Part. Phys.

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The search for a quasi bound η meson in atomic nuclei is reviewed. This tentative state is studied theoretically as well as experimentally. The theory starts from elastic η nucleon scattering which is derived from production data within some models. From this interaction the η nucleus interaction is derived. Model calculations predict binding energies and widths of the quasi bound state. Another method is to derive the η nucleus interaction from excitation functions of η production experiments. The s wave interaction is extracted from such data via final state interaction theorem. We give the derivation of s wave amplitudes in partial wave expansion and in helicity amplitudes and their relation to observables. Different experiments extracting the final state interaction are discussed as are production experiments. So far only three experiments give evidence for the existence of the quasi bound state: a pion double charge exchange experiment, an effective mass measurement, and a transfer reaction at recoil free kinematics with observation of the decay of the state.

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Section: The Reaction D + P → 3 He+ηsupporting

confidence: 82%

Section: Discussionmentioning

confidence: 99%

“…Data are from Refs. [106], [107], [108], [109], [110], [111], [112]. Those close to threshold are shown in Fig.…”

Section: The Reaction D + P → 3 He+ηmentioning

confidence: 98%

Section: The Reaction D + P → 3 He+ηmentioning

confidence: 99%

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Search for quasi boundηmesons

Machner

2015

J. Phys. G: Nucl. Part. Phys.

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“…Here, one should note that the experimental resolution for the incident photon energy is much better than the bin size in the figure [61] so that resolution effects for the slope are negligible. A similar but even more spectacular behaviour has been observed for the dp → 3 He η reaction measured at COSY [181,182] (see Fig. 39 and the discussion in Sec.…”

Section: Coherent Production 321 Single η-Production Off 3 He and 7supporting

confidence: 79%

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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Search for the $$\eta $$-Mesic Helium in Proton–Deuteron and Deuteron–Deuteron Reactions

Skurzok

2020

Recent Progress in Few-Body Physics

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Measurement of the dp→He3η reaction near threshold

Cited by 93 publications

References 27 publications

Search for quasi boundηmesons

Search for quasi boundηmesons

Production of η and η′ mesons on nucleons and nuclei

Search for the $$\eta $$-Mesic Helium in Proton–Deuteron and Deuteron–Deuteron Reactions

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