TY - JOUR

T1 - Study of e+e−→π+π−π0 at s from 2.00 to 3.08 GeV at BESIII

AU - BESIII Collaboration

AU - Ablikim, M.

AU - Achasov, M. n.

AU - Adlarson, P.

AU - Ai, X. c.

AU - Aliberti, R.

AU - Amoroso, A.

AU - An, M. r.

AU - An, Q.

AU - Bai, Y.

AU - Bakina, O.

AU - Balossino, I.

AU - Ban, Y.

AU - Bao, H.-R.

AU - Batozskaya, V.

AU - Begzsuren, K.

AU - Berger, N.

AU - Berlowski, M.

AU - Bertani, M.

AU - Bettoni, D.

AU - Bianchi, F.

AU - Bianco, E.

AU - Bortone, A.

AU - Briere, R. a.

AU - Brueggemann, A.

AU - Cai, H.

AU - Cai, X.

AU - Николаев, Иван Борисович

AU - Мучной, Николай Юрьевич

PY - 2024/8/6

Y1 - 2024/8/6

N2 - With the data samples taken at center-of-mass energies from 2.00 to 3.08 GeV with the BESIII detector at the BEPCII collider, a partial wave analysis on the e+e-→π+π-π0 process is performed. The Born cross sections for e+e-→π+π-π0 and its intermediate processes e+e-→ρπ and ρ(1450)π are measured as functions of s. The results for e+e-→π+π-π0 are consistent with previous results measured with the initial state radiation method within one standard deviation, and improve the uncertainty by a factor of ten. By fitting the line shapes of the Born cross sections for the e+e-→ρπ and e+e-→ρ(1450)π, a structure with mass M=2119±11±15 MeV/c2 and width Γ=69±30±5 MeV is observed with a significance of 5.9σ, where the first uncertainties are statistical and the second ones are systematic. This structure can be interpreted as an excited ω state.

AB - With the data samples taken at center-of-mass energies from 2.00 to 3.08 GeV with the BESIII detector at the BEPCII collider, a partial wave analysis on the e+e-→π+π-π0 process is performed. The Born cross sections for e+e-→π+π-π0 and its intermediate processes e+e-→ρπ and ρ(1450)π are measured as functions of s. The results for e+e-→π+π-π0 are consistent with previous results measured with the initial state radiation method within one standard deviation, and improve the uncertainty by a factor of ten. By fitting the line shapes of the Born cross sections for the e+e-→ρπ and e+e-→ρ(1450)π, a structure with mass M=2119±11±15 MeV/c2 and width Γ=69±30±5 MeV is observed with a significance of 5.9σ, where the first uncertainties are statistical and the second ones are systematic. This structure can be interpreted as an excited ω state.

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85200924330&origin=inward&txGid=31860962612fbdaef334edd87ffc7b34

U2 - 10.1103/PhysRevD.110.032005

DO - 10.1103/PhysRevD.110.032005

M3 - Article

VL - 110

JO - Physical Review D

JF - Physical Review D

SN - 2470-0010

IS - 3

M1 - 032005

ER -