Search for the process e + e − → η ′ γ in the energy range s = 1.075 − 2 GeV

The results of the search for the e + e − → η ′ γ process in the center-of-mass energy range from 1.075 to 2 GeV are presented. We analyze data with an integral luminosity of 746 pb − 1 accumulated with the SND detector at the e + e − collider VEPP-2000 in 2010–2024. The η ′ → η π 0 π 0 decay is...

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Veröffentlicht in:	Physical review. D 2024-10, Vol.110 (7), Article 072004
Hauptverfasser:	Achasov, M. N., Barnyakov, A. Yu, Bedarev, E. V., Beloborodov, K. I., Berdyugin, A. V., Bogdanchikov, A. G., Botov, A. A., Dimova, T. V., Druzhinin, V. P., Zhabin, V. N., Zharinov, Yu. M., Kardapoltsev, L. V., Kasaev, A. S., Kattsin, A. A., Kyrpotin, A. N., Kovrizhin, D. P., Koop, I. A., Korol, A. A., Kupich, A. S., Kryukov, A. P., Melnikova, N. A., Muchnoy, N. Yu, Obrazovsky, A. E., Pakhtusova, E. V., Pugachev, K. V., Rastigeev, S. A., Rogovsky, Yu. A., Senchenko, A. I., Serednyakov, S. I., Silagadze, Z. K., Surin, I. K., Usov, Yu. V., Kharlamov, A. G., Chistyakov, D. E., Shatunov, Yu. M., Sherstyuk, S. P., Shtol, D. A.
Format:	Artikel
Sprache:	eng
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Zusammenfassung:	The results of the search for the e + e − → η ′ γ process in the center-of-mass energy range from 1.075 to 2 GeV are presented. We analyze data with an integral luminosity of 746 pb − 1 accumulated with the SND detector at the e + e − collider VEPP-2000 in 2010–2024. The η ′ → η π 0 π 0 decay is used in the analysis, with the subsequent η and π 0 decays into γ γ . Upper limits not exceeding 13 pb have been set on the e + e − → η ′ γ cross section at the 90% confidence level.
ISSN:	2470-0010 2470-0029
DOI:	10.1103/PhysRevD.110.072004