Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Search for η mesic 3He with the WASA-at-COSY facility in the pd→3He2γ and pd→3He6γ reactions. / WASA-at-COSY Collaboration ; Шварц, Борис Альбертович.
в: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Том 802, 135205, 10.03.2020.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Search for η mesic 3He with the WASA-at-COSY facility in the pd→3He2γ and pd→3He6γ reactions
AU - The WASA-at-COSY Collaboration
AU - Adlarson, P.
AU - Augustyniak, W.
AU - Bardan, W.
AU - Bashkanov, M.
AU - Bass, S. D.
AU - Berłowski, M.
AU - Bondar, A.
AU - Büscher, M.
AU - Calén, H.
AU - Ciepał, I.
AU - Clement, H.
AU - Czerwiński, E.
AU - Engels, R.
AU - Erven, A.
AU - Erven, W.
AU - Eyrich, W.
AU - Fedorets, P.
AU - Föhl, K.
AU - Fransson, K.
AU - Goldenbaum, F.
AU - Goswami, A.
AU - Grigoryev, K.
AU - Heijkenskjöld, L.
AU - Hejny, V.
AU - Hirenzaki, S.
AU - Jarczyk, L.
AU - Johansson, T.
AU - Kamys, B.
AU - Kelkar, N. G.
AU - Kemmerling, G.
AU - Khreptak, A.
AU - Kirillov, D. A.
AU - Kistryn, S.
AU - Kleines, H.
AU - Kłos, B.
AU - Krzemień, W.
AU - Kulessa, P.
AU - Kupść, A.
AU - Lalwani, K.
AU - Lersch, D.
AU - Lorentz, B.
AU - Magiera, A.
AU - Maier, R.
AU - Marciniewski, P.
AU - Mariański, B.
AU - Morsch, H. P.
AU - Moskal, P.
AU - Ohm, H.
AU - Parol, W.
AU - Perez del Rio, E.
AU - Шварц, Борис Альбертович
N1 - Publisher Copyright: © 2020 The Authors Copyright: Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/3/10
Y1 - 2020/3/10
N2 - We report on the experimental search for the bound state of an η meson and He3 nucleus performed using the WASA-at-COSY detector setup. In order to search for the η-mesic nucleus decay, the pd→3He2γ and pd→3He6γ channels have been analysed. These reactions manifest the direct decay of the η meson bound in a He3 nucleus. This non-mesonic decay channel has been considered for the first time. When taking into account only statistical errors, the obtained excitation functions reveal a slight indication for a possible bound state signal corresponding to a 3He-η nucleus width Γ above 20 MeV and binding energy Bs between 0 and 15 MeV. However, the determined cross sections are consistent with zero in the range of the systematic uncertainty. Therefore, as final result we estimate only the upper limit for the cross section of the η-mesic He3 nucleus formation followed by the η meson decay which varies between 2 nb and 15 nb depending on possible bound state parameters.
AB - We report on the experimental search for the bound state of an η meson and He3 nucleus performed using the WASA-at-COSY detector setup. In order to search for the η-mesic nucleus decay, the pd→3He2γ and pd→3He6γ channels have been analysed. These reactions manifest the direct decay of the η meson bound in a He3 nucleus. This non-mesonic decay channel has been considered for the first time. When taking into account only statistical errors, the obtained excitation functions reveal a slight indication for a possible bound state signal corresponding to a 3He-η nucleus width Γ above 20 MeV and binding energy Bs between 0 and 15 MeV. However, the determined cross sections are consistent with zero in the range of the systematic uncertainty. Therefore, as final result we estimate only the upper limit for the cross section of the η-mesic He3 nucleus formation followed by the η meson decay which varies between 2 nb and 15 nb depending on possible bound state parameters.
KW - η meson
KW - η-mesic nuclei
KW - eta-meson
KW - NUCLEI
KW - BOUND-STATES
KW - MESON
KW - eta-mesic nuclei
UR - http://www.scopus.com/inward/record.url?scp=85077926532&partnerID=8YFLogxK
U2 - 10.1016/j.physletb.2020.135205
DO - 10.1016/j.physletb.2020.135205
M3 - Article
AN - SCOPUS:85077926532
VL - 802
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
SN - 0370-2693
M1 - 135205
ER -
ID: 23187482