Physics Letters B (Jan 2020)
Search for direct production of the f1(1285) resonance in e+e− collisions
- 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,
- A.A. Korol,
- D.P. Kovrizhin,
- S.V. Koshuba,
- A.S. Kupich,
- R.A. Litvinov,
- A.P. Lysenko,
- K.A. Martin,
- N.A. Melnikova,
- N.Yu. Muchnoi,
- A.E. Obrazovsky,
- E.V. Pakhtusova,
- E.A. Perevedentsev,
- K.V. Pugachev,
- S.I. Serednyakov,
- Z.K. Silagadze,
- P.Yu. Shatunov,
- Yu.M. Shatunov,
- D.A. Shtol,
- D.B. Shwartz,
- I.K. Surin,
- Yu.V. Usov,
- I.M. Zemlyansky,
- V.N. Zhabin,
- V.V. Zhulanov
Affiliations
- M.N. Achasov
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia
- A.Yu. Barnyakov
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia
- K.I. Beloborodov
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia
- A.V. Berdyugin
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia
- D.E. Berkaev
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia
- A.G. Bogdanchikov
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia
- A.A. Botov
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia
- T.V. Dimova
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia
- V.P. Druzhinin
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia; Corresponding author at: Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia.
- V.B. Golubev
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia
- L.V. Kardapoltsev
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia
- A.S. Kasaev
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia
- A.G. Kharlamov
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia
- I.A. Koop
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia; Novosibirsk State Technical University, Novosibirsk, 630092, Russia
- A.A. Korol
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia
- D.P. Kovrizhin
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia
- S.V. Koshuba
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia
- A.S. Kupich
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia
- R.A. Litvinov
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia
- A.P. Lysenko
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia
- K.A. Martin
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia
- N.A. Melnikova
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia
- N.Yu. Muchnoi
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia
- A.E. Obrazovsky
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia
- E.V. Pakhtusova
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia
- E.A. Perevedentsev
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia
- K.V. Pugachev
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia
- S.I. Serednyakov
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia
- Z.K. Silagadze
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia
- P.Yu. Shatunov
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia
- Yu.M. Shatunov
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia
- D.A. Shtol
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia
- D.B. Shwartz
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia
- I.K. Surin
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia
- Yu.V. Usov
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia
- I.M. Zemlyansky
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia
- V.N. Zhabin
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia
- V.V. Zhulanov
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia
- Journal volume & issue
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Vol. 800
Abstract
A search for direct production of the f1(1285) resonance in e+e− annihilation is performed with the SND detector at the VEPP-2000 e+e− collider. The analysis is based on data with an integrated luminosity of 15.1 pb−1 accumulated in the center-of-mass energy range 1.2–1.4 GeV. Two e+e−→f1(1285) candidate events are found at the peak of the resonance and zero events beyond the resonance. The significance of the e+e−→f1(1285) signal is 2.5σ. The cross section at the maximum of the resonance is found to be σ(e+e−→f1)=45−24+33 pb. The corresponding branching fraction B(f1(1285)→e+e−)=(5.1−2.7+3.7)×10−9. We consider this result as a first indication of the process e+e−→f1(1285). The measured branching fraction is consistent with the theoretical prediction.
