V. M. Aul'chenko, R. R. Akhmetshin, V. Sh. Banzarov, L. M. Barkov, N. S. Bashtovoi, A. E. Bondar, A. V. Bragin, A. A. Grebenyuk, D. N. Grigor'ev, D. A. Epifanov, A. S. Zaitsev, F. V. Ignatov, V. F. Kazanin, S. V. Karpov, I. A. Koop, P. P. Krokovny, A. S. Kuz'min, I. B. Logashenko, P. A. Lukin, K. Yu. Mikhailov, I. N. Nesterenko, A. V. Otboev, V. S. Okhapkin, E. A. Perevedentsev, A. S. Popov, S. I. Redin, A. A. Ruban, N. M. Ryskulov, A. L. Sibidanov, V. P. Smakhtin, I. G. Snopkov, E. P. Solodov, G. V. Fedotovich, B. I. Khazin, Yu. M. Shatunov, B. A. Shvarts, S. I. Èidel'man, Yu. V. Yudin, “Search for the ϕ → π+π−γγ and ϕ → π+π−η decays with the CMD-2 detector”, Pis'ma v Zh. Èksper. Teoret. Fiz., 2008, Volume 88, Issue 2,Pages 93

This article is cited in 1 paper

FIELDS, PARTICLES, AND NUCLEI

Search for the ϕ → π⁺π⁻γγ and ϕ → π⁺π⁻η decays with the CMD-2 detector

V. M. Aul'chenko^ab, R. R. Akhmetshin^b, V. Sh. Banzarov^b, L. M. Barkov^ab, N. S. Bashtovoi^b, A. E. Bondar^b, A. V. Bragin^b, A. A. Grebenyuk^b, D. N. Grigor'ev^cab, D. A. Epifanov^b, A. S. Zaitsev^ab, F. V. Ignatov^b, V. F. Kazanin^ab, S. V. Karpov^b, I. A. Koop^ab, P. P. Krokovny^ab, A. S. Kuz'min^ab, I. B. Logashenko^bd, P. A. Lukin^b, K. Yu. Mikhailov^b, I. N. Nesterenko^ab, A. V. Otboev^b, V. S. Okhapkin^b, E. A. Perevedentsev^ab, A. S. Popov^b, S. I. Redin^b, A. A. Ruban^b, N. M. Ryskulov^b, A. L. Sibidanov^b, V. P. Smakhtin^e, I. G. Snopkov^b, E. P. Solodov^ab, G. V. Fedotovich^ab, B. I. Khazin^ab, Yu. M. Shatunov^b, B. A. Shvarts^ab, S. I. Èidel'man^ab, Yu. V. Yudin^b

^a Novosibirsk State University, ul. Pirogova 2, Novosibirsk, 630090, Russia
^b Budker Institute of Nuclear Physics, Siberian Branch, Russian Academy of Sciences, pr. Akademika Lavrent'eva 11, Novosibirsk, 630090, Russia
^c Novosibirsk State Technical University, Novosibirsk, 630092, Russia
^d Boston University, Boston, MA 02215, USA
^e Weizmann Institute of Science, 76100, Rehovot, Israel

Abstract: The ϕ → π⁺π⁻γγ and ϕ → π⁺π⁻η decays are sought in the experimental data obtained with the CMD-2 detector in the region of the ϕ-meson resonance. Upper limits ℛ(ϕ → ππγγ)< 1.2 × 10⁻⁴ and ℛ(ϕ → ππη) < 6.1 × 10⁻⁵ (both at a C.L. of 90%) are determined for the branching ratios of these decays.

PACS: 13.25.-k, 13.66.-a, 14.40.Ev

Received: 17.06.2008