Studies of Mesic Nuclei via Decay Reactions

Wycech, S.; Krzemień, W.

doi:10.5506/aphyspolb.45.745

Cited by 42 publications

(40 citation statements)

References 21 publications

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“…Moreover, the obtained upper limit value does not exclude the cross-section σ tot =4.5 nb estimated in Ref. [53]. The excitation function for the dd → ( 4 He-η) bound → 3 Henπ 0 reaction was investigated for the first time.…”

Section: Results For the Search Of 4 He-η Mesic Nucleimentioning

confidence: 99%

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Recent Results from WASA-at-COSY

Clement¹,

Moskal²,

Skurzok³

2017

Proceedings of the 14th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon (MENU2016)

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The detector system WASA-at-COSY has been operated at the Cooler Synchrotron COSY in the years from 2006 till 2015. In this article we report on recent results of the analyses of the meson production reactions in nucleon-nucleon, nucleon-deuteron and deuteron-deuteron collisions with spin-polarized and unpolarized beams emphasizing the evidences for the existence of the dibaryon state in the proton-neutron system and the perspectives for the search of the η-mesic helium.

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Section: Results For the Search Of 4 He-η Mesic Nucleimentioning

confidence: 99%

“…The data analysis is in progress. In parallel to the experimental investigations, several theoretical studies are ongoing [53,[62][63][64][65][66][67][68][69][70][71][72][73][74][75][76][77].…”

Section: Perspectivesmentioning

confidence: 99%

Recent Results from WASA-at-COSY

Clement¹,

Moskal²,

Skurzok³

2017

Proceedings of the 14th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon (MENU2016)

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“…the η -meson while it is still "orbiting" around a nucleus e.g. : pd → ( 3 He-η) bound → 3 He6γ or pd → ( 3 He-η) bound → 3 He2γ reactions and (iii) η meson absorption by few nucleons [20,21] e.g. : pd → ( 3 He-η) bound → ppn or pd → ( 3 He-η) bound → pd.…”

Section: Results For the Search Of 4 He-η Bound Statesmentioning

confidence: 99%

Searching forη-mesic Helium with WASA-at-COSY facility

Rundel¹,

Khreptak²,

Skurzok³

et al. 2016

EPJ Web Conf.

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Abstract. The search for the 4 He-η and 3 He-η bound states was performed with the WASA-at-COSY facility using a ramped beam technique in 2008, 2010 and 2014, respectively. The 2008 and 2010 data analyses has already been completed and resulted in the upper limits for the total cross sections for the η-mesic 4 He production in dd → 3 Henπ 0 and dd → 3 Hepπ − processes. No narrow structure which could be interpreted as a bound state was observed. The experiment carried out in 2014 collected the largest data sample for 3 He-η in the world. The data analysis is in progress. This article presents results of the 2010 data analysis and preliminary results of the 2014 data analysis.

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“…The preliminary value of the upper limit obtained from the simultaneous fit, taking into account the isospin dependence of the dd → ( 4 He-η) bound → 3 Henπ 0 and dd → ( 4 He-η) bound → 3 Hepπ − excitation functions , of order of few nb can be compared to the theoretical estimate of 4 nb [48]. In case of the 3 He − η system, the analysis is ongoing.…”

Section: Discussionmentioning

confidence: 99%

Production and interaction of theηmeson with nucleons and nuclei

Krzemień¹,

Khreptak²,

Moskal³

et al. 2016

EPJ Web Conf.

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Abstract. We report on the status of the search for η-mesic nuclei and the studies of the interaction of the η meson with nucleons. Recently we have completed the analysis of the new WASA-at-COSY data on the production of the η meson with polarized proton beam. New results on the analyzing power for the pp → ppη reaction with more than an order of magnitude improved precision shed a new light on the production mechanism of the η meson in nucleon-nucleon collisions. Also, the latest results of the search for η-mesic nuclei are discussed.

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Studies of Mesic Nuclei via Decay Reactions

Abstract: Collisions in a system of two particles at energies close to a bound state in different channels are discussed. Next, the bound state decays into a third coupled channel. A phenomenological approach to dd → π − p 3 He reaction is presented.

Cited by 42 publications

References 21 publications

Recent Results from WASA-at-COSY

Recent Results from WASA-at-COSY

Searching forη-mesic Helium with WASA-at-COSY facility

Production and interaction of theηmeson with nucleons and nuclei

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