Measurement of e+e− → ωπ+π− cross section at s\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ \sqrt{s} $$\end{document} = 2.000 to 3.080 GeV

被引:0
作者
M. Ablikim
M. N. Achasov
P. Adlarson
S. Ahmed
M. Albrecht
R. Aliberti
A. Amoroso
M. R. An
Q. An
X. H. Bai
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
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. Chelkov
C. Chen
G. Chen
H. S. Chen
M. L. Chen
S. J. Chen
T. Chen
X. R. Chen
X. T. Chen
Y. B. Chen
Z. J. Chen
W. S. Cheng
G. Cibinetto
F. Cossio
J. J. Cui
机构
[1] Institute of High Energy Physics,Key Laboratory of Nuclear Physics and Ion
[2] Beihang University,beam Application (MOE) and Institute of Modern Physics
[3] Beijing Institute of Petrochemical Technology,State Key Laboratory of Nuclear Physics and Technology
[4] Bochum Ruhr-University,School of Physics and Electronics
[5] Carnegie Mellon University,Guangdong Provincial Key Laboratory of Nuclear Science, Institute of Quantum Matter
[6] Central China Normal University,Frontiers Science Center for Rare Isotopes
[7] China Center of Advanced Science and Technology,Lanzhou Center for Theoretical Physics
[8] COMSATS University Islamabad,Department of Mathematical Sciences
[9] Lahore Campus,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] Hangzhou Normal University,undefined
[15] Helmholtz Institute Mainz,undefined
[16] Henan Normal University,undefined
[17] Henan University of Science and Technology,undefined
[18] Henan University of Technology,undefined
[19] Huangshan College,undefined
[20] Hunan Normal University,undefined
[21] Hunan University,undefined
[22] Indian Institute of Technology Madras,undefined
[23] Indiana University,undefined
[24] INFN Laboratori Nazionali di Frascati,undefined
[25] INFN Sezione di Perugia,undefined
[26] University of Perugia,undefined
[27] INFN Sezione di Ferrara,undefined
[28] University of Ferrara,undefined
[29] Institute of Modern Physics,undefined
[30] Institute of Physics and Technology,undefined
[31] Jilin University,undefined
[32] Johannes Gutenberg University of Mainz,undefined
[33] Joint Institute for Nuclear Research,undefined
[34] Justus-Liebig-Universitaet Giessen,undefined
[35] II. Physikalisches Institut,undefined
[36] Lanzhou University,undefined
[37] Liaoning Normal University,undefined
[38] Liaoning University,undefined
[39] Nanjing Normal University,undefined
[40] Nanjing University,undefined
[41] Nankai University,undefined
[42] National Centre for Nuclear Research,undefined
[43] North China Electric Power University,undefined
[44] Peking University,undefined
[45] Qufu Normal University,undefined
[46] Shandong Normal University,undefined
[47] Shandong University,undefined
[48] Shanghai Jiao Tong University,undefined
[49] Shanxi Normal University,undefined
[50] Shanxi University,undefined
关键词
-; Experiments; Particle and Resonance Production; Vector Boson Production;
D O I
10.1007/JHEP01(2023)111
中图分类号
学科分类号
摘要
A partial wave analysis on the process e+e− → ωπ+π− is performed using 647 pb−1 of data sample collected by using the BESIII detector operating at the BEPCII storage ring at center-of-mass (c.m.) energies from 2.000 GeV to 3.080 GeV. The Born cross section of the e+e− → ωπ+π− process is measured, with precision improved by a factor of 3 compared to that of previous studies. A structure near 2.25 GeV is observed in the energy-dependent cross sections of e+e− → ωπ+π− and ωπ0π0 with a statistical significance of 7.6σ, and its determined mass and width are 2232 ± 19 ± 27 MeV/c2 and 93 ± 53 ± 20 MeV, respectively, where the first and second uncertainties are statistical and systematic, respectively. By analyzing the cross sections of subprocesses e+e− → ωf0(500), ωf0(980), ωf0(1370), ωf2(1270), and b1(1235)π, a structure, with mass M = 2200 ± 11 ± 17 MeV/c2 and width Γ = 74 ± 20 ± 24 MeV, is observed with a combined statistical significance of 7.9σ. The measured resonance parameters will help to reveal the nature of vector states around 2.25 GeV.
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