Physics Letters B (Jul 2019)
Observation of a fine structure in e+e− → hadrons production at the nucleon-antinucleon threshold
- R.R. Akhmetshin,
- A.N. Amirkhanov,
- A.V. Anisenkov,
- V.M. Aulchenko,
- V.Sh. Banzarov,
- N.S. Bashtovoy,
- D.E. Berkaev,
- A.E. Bondar,
- A.V. Bragin,
- S.I. Eidelman,
- D.A. Epifanov,
- L.B. Epshteyn,
- A.L. Erofeev,
- G.V. Fedotovich,
- S.E. Gayazov,
- A.A. Grebenuk,
- S.S. Gribanov,
- D.N. Grigoriev,
- F.V. Ignatov,
- V.L. Ivanov,
- S.V. Karpov,
- V.F. Kazanin,
- I.A. Koop,
- A.N. Kirpotin,
- A.A. Korobov,
- A.N. Kozyrev,
- E.A. Kozyrev,
- P.P. Krokovny,
- A.E. Kuzmenko,
- A.S. Kuzmin,
- I.B. Logashenko,
- P.A. Lukin,
- K.Yu. Mikhailov,
- V.S. Okhapkin,
- A.V. Otboev,
- Yu.N. Pestov,
- A.S. Popov,
- G.P. Razuvaev,
- A.A. Ruban,
- N.M. Ryskulov,
- A.E. Ryzhenenkov,
- A.I. Senchenko,
- Yu.M. Shatunov,
- P.Yu. Shatunov,
- V.E. Shebalin,
- D.N. Shemyakin,
- B.A. Shwartz,
- D.B. Shwartz,
- A.L. Sibidanov,
- E.P. Solodov,
- A.A. Talyshev,
- V.M. Titov,
- S.S. Tolmachev,
- A.I. Vorobiov,
- I.M. Zemlyansky,
- Yu.V. Yudin
Affiliations
- R.R. Akhmetshin
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia
- A.N. Amirkhanov
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia
- A.V. Anisenkov
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia
- V.M. Aulchenko
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia
- V.Sh. Banzarov
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia
- N.S. Bashtovoy
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia
- D.E. Berkaev
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia
- A.E. Bondar
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia
- A.V. Bragin
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia
- S.I. Eidelman
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia; Lebedev Physical Institute, RAS, Moscow, 119333, Russia
- D.A. Epifanov
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia
- L.B. Epshteyn
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia; Novosibirsk State Technical University, Novosibirsk, 630092, Russia
- A.L. Erofeev
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia
- G.V. Fedotovich
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia
- S.E. Gayazov
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia
- A.A. Grebenuk
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia
- S.S. Gribanov
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia
- D.N. Grigoriev
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia; Novosibirsk State Technical University, Novosibirsk, 630092, Russia
- F.V. Ignatov
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia
- V.L. Ivanov
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia
- S.V. Karpov
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia
- V.F. Kazanin
- 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
- A.N. Kirpotin
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia
- A.A. Korobov
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia
- A.N. Kozyrev
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State Technical University, Novosibirsk, 630092, Russia
- E.A. Kozyrev
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia
- P.P. Krokovny
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia
- A.E. Kuzmenko
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia
- A.S. Kuzmin
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia
- I.B. Logashenko
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia
- P.A. Lukin
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia
- K.Yu. Mikhailov
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia
- V.S. Okhapkin
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia
- A.V. Otboev
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia
- Yu.N. Pestov
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia
- A.S. Popov
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia
- G.P. Razuvaev
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia
- A.A. Ruban
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia
- N.M. Ryskulov
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia
- A.E. Ryzhenenkov
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia
- A.I. Senchenko
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia
- Yu.M. Shatunov
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia
- P.Yu. Shatunov
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia
- V.E. Shebalin
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia
- D.N. Shemyakin
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia
- B.A. Shwartz
- 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
- A.L. Sibidanov
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; University of Victoria, Victoria, BC, V8W 3P6, Canada
- E.P. Solodov
- 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.
- A.A. Talyshev
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia
- V.M. Titov
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia
- S.S. Tolmachev
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia
- A.I. Vorobiov
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia
- I.M. Zemlyansky
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia
- Yu.V. Yudin
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia; Novosibirsk State University, Novosibirsk, 630090, Russia
- Journal volume & issue
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Vol. 794
pp. 64 – 68
Abstract
A study of hadron production at the nucleon-antinucleon threshold has been performed with the CMD-3 detector at the VEPP-2000 e+e− collider. The very fast rise with about 1 MeV width has been observed in the e+e−→pp¯ cross section. A sharp drop in the e+e−→3(π+π−) cross section has been confirmed and found to have a less than 2 MeV width, in agreement with the observed fast rise of the e+e−→pp¯ cross section. For the first time a similar sharp drop is demonstrated in the e+e−→K+K−π+π− cross section. The behavior of the e+e−→3(π+π−),K+K−π+π− cross sections cannot be explained by an interference of any resonance amplitude with continuum, therefore this phenomenon cannot be due to a narrow near-threshold resonance. No such structure has been observed in the e+e−→2(π+π−) cross section.
