@article{fc1c656147bb43f5a319c8bae3961015,
title = "Observation of a fine structure in e+e− → hadrons production at the nucleon-antinucleon threshold",
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.",
keywords = "NARROW DIP STRUCTURE, CROSS-SECTION, 1.9 GEV/C(2), ANNIHILATION, ENERGY, P(P)OVER-BAR",
author = "{CMD-3 Collaboration} and Akhmetshin, {R. R.} and Amirkhanov, {A. N.} and Anisenkov, {A. V.} and Aulchenko, {V. M.} and Banzarov, {V. Sh} and Bashtovoy, {N. S.} and Berkaev, {D. E.} and Bondar, {A. E.} and Bragin, {A. V.} and Eidelman, {S. I.} and Epifanov, {D. A.} and Epshteyn, {L. B.} and Erofeev, {A. L.} and Fedotovich, {G. V.} and Gayazov, {S. E.} and Grebenuk, {A. A.} and Gribanov, {S. S.} and Grigoriev, {D. N.} and Ignatov, {F. V.} and Ivanov, {V. L.} and Karpov, {S. V.} and Kazanin, {V. F.} and Koop, {I. A.} and Kirpotin, {A. N.} and Korobov, {A. A.} and Kozyrev, {A. N.} and Kozyrev, {E. A.} and Krokovny, {P. P.} and Kuzmenko, {A. E.} and Kuzmin, {A. S.} and Logashenko, {I. B.} and Lukin, {P. A.} and Mikhailov, {K. Yu} and Okhapkin, {V. S.} and Otboev, {A. V.} and Pestov, {Yu N.} and Popov, {A. S.} and Razuvaev, {G. P.} and Ruban, {A. A.} and Ryskulov, {N. M.} and Ryzhenenkov, {A. E.} and Senchenko, {A. I.} and Shatunov, {Yu M.} and Shemyakin, {D. N.} and Shwartz, {B. A.} and Shwartz, {D. B.} and Solodov, {E. P.} and Talyshev, {A. A.} and Tolmachev, {S. S.} and Yudin, {Yu V.} and Шемякин, {Дмитрий Николаевич}",
year = "2019",
month = jul,
day = "10",
doi = "10.1016/j.physletb.2019.05.032",
language = "English",
volume = "794",
pages = "64--68",
journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",
issn = "0370-2693",
publisher = "Elsevier",
}