Year: 2018
Type: article
Abstract: A search for the rare decay $\ensuremath{\eta}\ensuremath{\rightarrow}{e}^{+}{e}^{\ensuremath{-}}$ is performed using the inverse process ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}\ensuremath{\eta}$ in the decay mode $\ensuremath{\eta}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{0}{\ensuremath{\pi}}^{0}{\ensuremath{\pi}}^{0}$. We analyze data with an integrated luminosity of $654\text{ }\text{ }{\mathrm{nb}}^{\ensuremath{-}1}$ accumulated at the VEPP-2000 ${e}^{+}{e}^{\ensuremath{-}}$ collider with the SND detector at the center-of-mass energy $E={m}_{\ensuremath{\eta}}{c}^{2}\ensuremath{\approx}548\text{ }\text{ }\mathrm{MeV}$, and set the upper limit $\mathcal{B}(\ensuremath{\eta}\ensuremath{\rightarrow}{e}^{+}{e}^{\ensuremath{-}})<7\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}7}$ at the 90% confidence level.
Authors: M. N. Achasov, A. Yu. Barnyakov, K. I. Beloborodov, A. V. Berdyugin, D. E. Berkaev, A. G. Bogdanchikov, A. A. Botov, T. V. Dimova, V. P. Druzhinin, V. B. Golubev, L. V. Kardapoltsev, A. S. Kasaev, A. G. Kharlamov, I. A. Koop, L. A. Korneev, A. A. Korol, D. P. Kovrizhin, S. V. Koshuba, A. S. Kupich, R. A. Litvinov, K. A. Martin, N. A. Melnikova, N. Yu. Muchnoi, A. E. Obrazovsky, E. V. Pakhtusova, K. V. Pugachev, Yu. A. Rogovsky, A. I. Senchenko, S. I. Serednyakov, Z. K. Silagadze, D. N. Shatilov, Yu. M. Shatunov, D. A. Shtol, D. B. Shwartz, I. K. Surin, Yu. V. Usov, A. V. Vasiljev, V. N. Zhabin, V. V. Zhulanov
Language: Latvian
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Funder: Russian Science Foundation
Awards: G7131804313, G7259345814, G82002743
OpenAlex ID: W2809125474