Search for η-mesic nuclei in the reaction d + C at JINR

Afanasiev, S.; Artiomov, A.S.; Bekmirzaev, R.N.; Dryablov, D.K.; Igamkulov, Z. A.; Іванов, В.І.; Isupov, A.Yu.; Jomurodov, D.M.; Malakhov, A.; Lebedev, A.; L’vov, A. I.; Pavlyuchenko, L. N.; Plekhanov, E. B.; Polyansky, V. V.; Sidorin, S. S.; Sokol, G.A.; Sultanov, M.U.

doi:10.1134/s1547477111100025

Cited by 22 publications

(14 citation statements)

References 6 publications

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“…Early experiments with low statistics using photon (Baskov et al, 2012;Pheron et al, 2012), pion (Chrien et al, 1988), proton (Budzanowski et al, 2009b) or deuteron (Afanasiev et al, 2011;Moskal and Smyrski, 2010) beams gave hints for possible η mesic bound states but no clear signal (Kelkar et al, 2013;Metag et al, 2017). New COSY searches have focused on possible η bound states in 3 He and 4 He (Adlarson et al, 2013(Adlarson et al, , 2017b.…”

Section: The η and η In Nucleimentioning

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: The η and η In Nucleimentioning

confidence: 99%

η′ and η mesons with connection to anomalous glue

Bass

Moskal

2019

Rev. Mod. Phys.

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“…A decade later, a large values of the η-nucleon scattering length (1 fm) were extracted in some analysis reported in [99] which do not exclude the formation of bound η-nucleus states for such light nuclei as helium [100,101] or even for deuteron [102]. However, so far none of the experiments have confirmed univocally the existence of such a state neither in reactions induced by pions [103], protons [104], deuterons [105][106][107] or photons [93,108]. In the searches for the direct signal from the η-mesic helium the established so far upper limits amount to about 270 nb for the dp → ( 3 Heη) bound → pppπ − reaction [105], about 70 nb for the dp → ( 3 Heη) bound → 3 Heπ 0 reaction [105], and about 25 nb for the dd → ( 4 Heη) bound → 3 He pπ − reaction [106].…”

Section: Threshold Production Of the η − 3 H E And η − H E Systems Anmentioning

confidence: 99%

Few-Body Aspects of the Near Threshold Pseudoscalar Meson Production

Moskal

2014

Few-Body Syst

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During the last decade large samples of data have been collected on the production of the groundstate pseudoscalar mesons in collisions of proton or deuteron beam with hydrogen or deuterium target. These measurements have been performed in the vicinity of the kinematical threshold for meson production where only a few partial waves in both initial and final state are expected to contribute to the production process. This simplifies significantly the interpretation of the data, yet still appears to be challenging due to the three or four particle final state systems with a complex hadronic potential. We review experiments and phenomenology of the near threshold production of the ground-state mesons in the few-body final states as for example: nucleus-meson and nucleon-nucleon-meson, and report on the status of the search of the mesic-nuclei (a meson-nucleus bound states). Experimental advantages of measurements close to the kinematical threshold are discussed, and general features of the production mechanism of the η and η mesons in the nucleon-nucleon collisions are presented emphasising results of measurements of spin and isospin dependence of the production cross sections.

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“…Since then, the search for η-and η -mesic bound states was performed in many laboratories as e.g. : COSY [3][4][5][6][7][8][9], ELSA [10], GSI [11], JINR [12], JPARC [13], LPI [14], and MAMI [15,46], however, till now none of the experiments confirmed its existence. The status of the search was recently described in the following reviews [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Search for theη-mesic Helium bound state with the WASA-at-COSY facility

Skurzok

Krzemień

Rundel

et al. 2016

EPJ Web of Conferences

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We performed a search for 4 He-η bound state with high statistics and high acceptance with the WASA-at-COSY facility using a ramped beam technique. The signature of η-mesic nuclei is searched for in dd → 3 Henπ 0 and dd → 3 Hepπ − reactions by the measurement of the excitation functions in the vicinity of the η production threshold. This paper presents the experimental method and the preliminary results of the data analysis for dd → 3 Henπ 0 process.

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Search for η-mesic nuclei in the reaction d + C at JINR

Cited by 22 publications

References 6 publications

η′ and η mesons with connection to anomalous glue

η′ and η mesons with connection to anomalous glue

Few-Body Aspects of the Near Threshold Pseudoscalar Meson Production

Search for theη-mesic Helium bound state with the WASA-at-COSY facility

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