Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Search for C violation in the decay η → π0e+e− with WASA-at-COSY. / WASA-at-COSY Collaboration.
в: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Том 784, 10.09.2018, стр. 378-384.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Search for C violation in the decay η → π0e+e− with WASA-at-COSY
AU - The WASA-at-COSY Collaboration
AU - Adlarson, P.
AU - Augustyniak, W.
AU - Bardan, W.
AU - Bashkanov, M.
AU - Bergmann, F. S.
AU - Berłowski, M.
AU - Bondar, A.
AU - Büscher, M.
AU - Calén, H.
AU - Ciepał, I.
AU - Clement, H.
AU - Czerwiński, E.
AU - Demmich, K.
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 - Gullström, C. O.
AU - Heijkenskjöld, L.
AU - Hejny, V.
AU - Hüsken, N.
AU - Jarczyk, L.
AU - Johansson, T.
AU - Kamys, B.
AU - Kemmerling, G.
AU - Khatri, G.
AU - Khoukaz, A.
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 - Kuzmin, A.
AU - Lalwani, K.
AU - Lersch, D.
AU - Lorentz, B.
AU - Magiera, A.
AU - Maier, R.
AU - Marciniewski, P.
AU - Mariański, B.
AU - Shwartz, B.
N1 - Publisher Copyright: © 2018 The Author
PY - 2018/9/10
Y1 - 2018/9/10
N2 - We report on the search for the rare decay η→π0e+e− which is of interest to study C violation in the electromagnetic interaction which would indicate contributions from physics beyond the Standard Model, since the allowed decay via a two-photon intermediate state is strongly suppressed. The experiment has been performed using the WASA-at-COSY installation, located at the COSY accelerator of the Forschungszentrum Jülich, Germany. In total 3×107 events of the reaction pd→3Heη have been recorded at an excess energy of Q=59.8MeV. Based on this data set the C parity violating decay η→π0γ⁎→π0e+e− via a single-photon intermediate state has been searched for, resulting in new upper limits of Γ(η→π0e+e−)/Γ(η→π+π−π0)<3.28×10−5 and Γ(η→π0e+e−)/Γ(η→all)<7.5×10−6 (CL=90%), respectively.
AB - We report on the search for the rare decay η→π0e+e− which is of interest to study C violation in the electromagnetic interaction which would indicate contributions from physics beyond the Standard Model, since the allowed decay via a two-photon intermediate state is strongly suppressed. The experiment has been performed using the WASA-at-COSY installation, located at the COSY accelerator of the Forschungszentrum Jülich, Germany. In total 3×107 events of the reaction pd→3Heη have been recorded at an excess energy of Q=59.8MeV. Based on this data set the C parity violating decay η→π0γ⁎→π0e+e− via a single-photon intermediate state has been searched for, resulting in new upper limits of Γ(η→π0e+e−)/Γ(η→π+π−π0)<3.28×10−5 and Γ(η→π0e+e−)/Γ(η→all)<7.5×10−6 (CL=90%), respectively.
KW - CONSERVING DECAY
KW - UPPER LIMIT
UR - http://www.scopus.com/inward/record.url?scp=85052052848&partnerID=8YFLogxK
U2 - 10.1016/j.physletb.2018.07.017
DO - 10.1016/j.physletb.2018.07.017
M3 - Article
AN - SCOPUS:85052052848
VL - 784
SP - 378
EP - 384
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
ER -
ID: 16243219