Study of the e+e−→ π+π−ω process at center-of-mass energies between 4.0 and 4.6 GeV

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作者
M. Ablikim
M. N. Achasov
P. Adlarson
M. Albrecht
R. Aliberti
A. Amoroso
M. R. An
Q. An
Y. Bai
O. Bakina
R. Baldini Ferroli
I. Balossino
Y. Ban
V. Batozskaya
D. Becker
K. Begzsuren
N. Berger
M. Bertani
D. Bettoni
F. Bianchi
E. Bianco
J. Bloms
A. Bortone
I. Boyko
R. A. Briere
A. Brueggemann
H. Cai
X. Cai
A. Calcaterra
G. F. Cao
N. Cao
S. A. Cetin
J. F. Chang
W. L. Chang
G. R. Che
G. Chelkov
C. Chen
Chao Chen
G. Chen
H. S. Chen
M. L. Chen
S. J. Chen
S. M. Chen
T. Chen
X. R. Chen
X. T. Chen
Y. B. Chen
Z. J. Chen
W. S. Cheng
S. K. Choi
机构
[1] Institute of High Energy Physics,State Key Laboratory of Nuclear Physics and Technology
[2] Beihang University,School of Physics and Electronics
[3] Beijing Institute of Petrochemical Technology,Guangdong Provincial Key Laboratory of Nuclear Science, Institute of Quantum Matter
[4] Bochum Ruhr-University,Frontiers Science Center for Rare Isotopes
[5] Carnegie Mellon University,Lanzhou Center for Theoretical Physics
[6] Central China Normal University,undefined
[7] Central South University,undefined
[8] China Center of Advanced Science and Technology,undefined
[9] COMSATS University Islamabad,undefined
[10] Fudan University,undefined
[11] G.I. Budker Institute of Nuclear Physics SB RAS (BINP),undefined
[12] GSI Helmholtzcentre for Heavy Ion Research GmbH,undefined
[13] Guangxi Normal University,undefined
[14] Guangxi University,undefined
[15] Hangzhou Normal University,undefined
[16] Hebei University,undefined
[17] Helmholtz Institute Mainz,undefined
[18] Henan Normal University,undefined
[19] Henan University of Science and Technology,undefined
[20] Henan University of Technology,undefined
[21] Huangshan College,undefined
[22] Hunan Normal University,undefined
[23] Hunan University,undefined
[24] Indian Institute of Technology,undefined
[25] Indiana University,undefined
[26] INFN Laboratori Nazionali di Frascati,undefined
[27] INFN Sezione di Perugia,undefined
[28] University of Perugia,undefined
[29] INFN Sezione di Ferrara,undefined
[30] University of Ferrara,undefined
[31] Institute of Modern Physics,undefined
[32] Institute of Physics and Technology,undefined
[33] Jilin University,undefined
[34] Johannes Gutenberg University of Mainz,undefined
[35] Joint Institute for Nuclear Research,undefined
[36] Justus-Liebig-Universitaet Giessen,undefined
[37] II. Physikalisches Institut,undefined
[38] Lanzhou University,undefined
[39] Liaoning Normal University,undefined
[40] Liaoning University,undefined
[41] Nanjing Normal University,undefined
[42] Nanjing University,undefined
[43] Nankai University,undefined
[44] National Centre for Nuclear Research,undefined
[45] North China Electric Power University,undefined
[46] Peking University,undefined
[47] Qufu Normal University,undefined
[48] Shandong Normal University,undefined
[49] Shandong University,undefined
[50] Shanghai Jiao Tong University,undefined
关键词
-; Experiments; QCD; Quarkonium;
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摘要
Using 15.6 fb−1 of e+e− collision data collected at twenty-four center-of-mass energies from 4.0 to 4.6 GeV with the BESIII detector, the helicity amplitudes of the process e+e− → π+π−ω are analyzed for the first time. Born cross section measurements of two-body intermediate resonance states with statistical significance greater than 5σ are presented, such as f0(500), f0(980), f2(1270), f0(1370), b1(1235)±, and ρ(1450)±. In addition, evidence of a resonance state in e+e− → π+π−ω production is found. The mass of this state obtained by line shape fitting is about 4.2 GeV/c2, which is consistent with the production of ψ(4160) or Y(4220).
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