The process e + e − → π + π − π 0 in the energy range 2E_0=1.04 - 1.38 GeV
M.N.Achasov, V.M.Aulchenko, S.E.Baru, K.I.Beloborodov, A.V.Berdyugin, A.V.Bozhenok, A.D.Bukin, D.A.Bukin, S.V.Burdin, T.V.Dimova, S.I.Dolinsky, V.P.Druzhinin, M.S.Dubrovin, I.A.Gaponenko, V.B.Golubev, V.N.Ivanchenko, I.A.Koop, P.M.Ivanov, A.A.Korol, S.V.Koshuba, E.V.Pakhtusova, E.A.Perevedentsev, A.A.Salnikov, S.I.Serednyakov, V.V.Shary, Yu.M.Shatunov, V.A.Sidorov, Z.K.Silagadze, A.N.Skrinsky, Y.V.Usov, A.V.Varganov, A.V.Vasilyev, Yu.S.Velikzhanin
Abstract
In the experiment with the SND detector at VEPP-2M e^+e^- collider the process
e
+
e
−
→
π
+
π
−
π
0
was studied in the energy range 2E_0 from 1.04 to 1.38 GeV. A broad peak was observed with the visible mass
M
vis
=1220±20
MeV and cross section in the maximum
σ
0
≃4
nb. The peak can be interpreted as a
ω
-like resonance
ω(1200)
.