EPJ Web of Conferences (Jan 2019)
The NNbar and multihadron production at the threshold at VEPP2000
- Solodov E. P.,
- Akhmetshin R. R.,
- Amirkhanov A. N.,
- Anisenkov A. V.,
- Aulchenko V. M.,
- Banzarov V. Sh.,
- Bashtovoy N. S.,
- Berkaev D. E.,
- Bondar A. E.,
- Bragin A. V.,
- Eidelman S. I.,
- Epifanov D. A.,
- Epshteyn L. B.,
- Erofeev A. L.,
- Fedotovich G. V.,
- Gayazov S. E.,
- Grebenuk A. A.,
- Gribanov S. S.,
- Grigoriev D. N.,
- Ignatov F. V.,
- Ivanov V. L.,
- Karpov S. V.,
- Kazanin V. F.,
- Koop I. A.,
- Kirpotin A. N.,
- Korobov A. A.,
- Kozyrev A. N.,
- Kozyrev E. A.,
- Krokovny P. P.,
- Kuzmenko A. E.,
- Kuzmin A. S.,
- Logashenko I. B.,
- Lukin P. A.,
- Mikhailov K. Yu.,
- Okhapkin V. S.,
- Pestov Yu. N.,
- Popov A. S.,
- Razuvaev G. P.,
- Rogovsky Yu. A.,
- Ruban A. A.,
- Ryskulov N. M.,
- Ryzhenenkov A. E.,
- Semenov A. V.,
- Shatunov Yu. M.,
- Shatunov P. Yu.,
- Shebalin V. E.,
- Shemyakin D. N.,
- Shwartz B. A.,
- Shwartz D. B.,
- Sibidanov A. L.,
- Titov V. M.,
- Talyshev A. A.,
- Vorobiov A. I.,
- Zemlyansky I. M.,
- Yudin Yu. V.
Affiliations
- Solodov E. P.
- Akhmetshin R. R.
- Amirkhanov A. N.
- Anisenkov A. V.
- Aulchenko V. M.
- Banzarov V. Sh.
- Budker Institute of Nuclear Physics, SB RAS
- Bashtovoy N. S.
- Budker Institute of Nuclear Physics, SB RAS
- Berkaev D. E.
- Bondar A. E.
- Bragin A. V.
- Budker Institute of Nuclear Physics, SB RAS
- Eidelman S. I.
- Epifanov D. A.
- Epshteyn L. B.
- Erofeev A. L.
- Fedotovich G. V.
- Gayazov S. E.
- Grebenuk A. A.
- Gribanov S. S.
- Grigoriev D. N.
- Ignatov F. V.
- Ivanov V. L.
- Karpov S. V.
- Budker Institute of Nuclear Physics, SB RAS
- Kazanin V. F.
- Koop I. A.
- Kirpotin A. N.
- Budker Institute of Nuclear Physics, SB RAS
- Korobov A. A.
- Kozyrev A. N.
- Kozyrev E. A.
- Krokovny P. P.
- Kuzmenko A. E.
- Kuzmin A. S.
- Logashenko I. B.
- Lukin P. A.
- Mikhailov K. Yu.
- Budker Institute of Nuclear Physics, SB RAS
- Okhapkin V. S.
- Budker Institute of Nuclear Physics, SB RAS
- Pestov Yu. N.
- Budker Institute of Nuclear Physics, SB RAS
- Popov A. S.
- Razuvaev G. P.
- Rogovsky Yu. A.
- Budker Institute of Nuclear Physics, SB RAS
- Ruban A. A.
- Budker Institute of Nuclear Physics, SB RAS
- Ryskulov N. M.
- Budker Institute of Nuclear Physics, SB RAS
- Ryzhenenkov A. E.
- Semenov A. V.
- Shatunov Yu. M.
- Budker Institute of Nuclear Physics, SB RAS
- Shatunov P. Yu.
- Budker Institute of Nuclear Physics, SB RAS
- Shebalin V. E.
- Shemyakin D. N.
- Shwartz B. A.
- Shwartz D. B.
- Sibidanov A. L.
- Titov V. M.
- Budker Institute of Nuclear Physics, SB RAS
- Talyshev A. A.
- Vorobiov A. I.
- Budker Institute of Nuclear Physics, SB RAS
- Zemlyansky I. M.
- Budker Institute of Nuclear Physics, SB RAS
- Yudin Yu. V.
- DOI
- https://doi.org/10.1051/epjconf/201921207002
- Journal volume & issue
-
Vol. 212
p. 07002
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. A very fast rise with an about 1 MeV width has been observed in the e+e−→ pp̅ cross section. A sharp drop in the e+ e−→ 3(π+π−) cross section has been con?rmed and found to have a width of less than 2 MeV, in agreement with the observed fast rise of the e+e−→ pp̅ cross section. For the ?rst 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.
