Open Access
Evidence of a Resonant Structure in the
e + e − → π + D 0 D * −
M. ABLIKIM
,
M. N. ACHASOV
,
S. Ahmed
,
M Albrecht
,
M. Albrecht
,
A. Amoroso
,
F. F. An
,
Q. An
,
Y. Bai
,
O. Bakina
,
R. Baldini Ferroli
,
Y. BAN
,
D. W. Bennett
,
J V Bennett
,
N. Berger
,
M. Bertani
,
D. Bettoni
,
J. M. Bian
,
F Bianchi
,
E. Boger
,
I. Boyko
,
R. A. Briere
,
H. Cai
,
X Cai
,
O. Cakir
,
A. Calcaterra
,
G. F. Cao
,
S. A. Cetin
,
J. Chai
,
J. F. Chang
,
G. Chelkov
,
G. Chen
,
H. S. Chen
,
J. C. Chen
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M L Chen
,
P. L. Chen
,
S J Chen
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Y.-B. Chen
,
G. Cibinetto
,
H. L. Dai
,
J. P. Dai
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A. Dbeyssi
,
D. Dedovich
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Z. Y. DENG
,
A. DENIG
,
I. Denysenko
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M. Destefanis
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F. De Mori
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Y. Ding
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C. Dong
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J. Dong
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L. Y. Dong
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M. Y. Dong
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Z.L. Dou
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S. X. DU
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P. F. Duan
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J. Z. Fan
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J. Fang
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S. S. Fang
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R. Farinelli
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L. Fava
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S. Q. Zhang
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Y. T. Zhang
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Yang Zhang
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Yao Zhang
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Yu Zhang
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Z. Y. Zhang
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G. Zhao
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J. W. ZHAO
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Lei Zhao
,
Ling Zhao
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M. G. ZHAO
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T. C. Zhao
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Y. B. Zhao
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Z. G. ZHAO
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B. Zheng
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J. P. Zheng
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W. J. Zheng
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B. ZHONG
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L. Zhou
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X.-R. ZHOU
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X. Y. Zhou
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Y. X. Zhou
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J Zhu
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K. Zhu
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K. J. Zhu
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S Zhu
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S.-H. Zhu
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X L Zhu
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Y. C. Zhu
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Z. A. ZHU
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J. Zhuang
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B. S. ZOU
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Publication type: Journal Article
Publication date: 2019-03-15
scimago Q1
wos Q1
SJR: 2.856
CiteScore: 15.6
Impact factor: 9.0
ISSN: 00319007, 10797114
PubMed ID:
30932669
General Physics and Astronomy
Abstract
The cross section of the process e^{+}e^{-}→π^{+}D^{0}D^{*-} for center-of-mass energies from 4.05 to 4.60 GeV is measured precisely using data samples collected with the BESIII detector operating at the BEPCII storage ring. Two enhancements are clearly visible in the cross section around 4.23 and 4.40 GeV. Using several models to describe the dressed cross section yields stable parameters for the first enhancement, which has a mass of 4228.6±4.1±6.3 MeV/c^{2} and a width of 77.0±6.8±6.3 MeV, where the first uncertainties are statistical and the second ones are systematic. Our resonant mass is consistent with previous observations of the Y(4220) state and the theoretical prediction of a DD[over ¯]_{1}(2420) molecule. This result is the first observation of Y(4220) associated with an open-charm final state. Fits with three resonance functions with additional Y(4260), Y(4320), Y(4360), ψ(4415), or a new resonance do not show significant contributions from either of these resonances. The second enhancement is not from a single known resonance. It could contain contributions from ψ(4415) and other resonances, and a detailed amplitude analysis is required to better understand this enhancement.
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ABLIKIM M. et al. Evidence of a Resonant Structure in the e+e−→π+D0D*− Cross Section between 4.05 and 4.60 GeV // Physical Review Letters. 2019. Vol. 122. No. 10. 102002
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ABLIKIM M. et al. Evidence of a Resonant Structure in the e+e−→π+D0D*− Cross Section between 4.05 and 4.60 GeV // Physical Review Letters. 2019. Vol. 122. No. 10. 102002
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@article{2019_ABLIKIM,
author = {M. ABLIKIM and M. N. ACHASOV and S. Ahmed and M Albrecht and M. Albrecht and A. Amoroso and F. F. An and Q. An and Y. Bai and O. Bakina and R. Baldini Ferroli and Y. BAN and D. W. Bennett and J V Bennett and N. Berger and M. Bertani and D. Bettoni and J. M. Bian and F Bianchi and E. Boger and I. Boyko and R. A. Briere and H. Cai and X Cai and O. Cakir and A. Calcaterra and G. F. Cao and S. A. Cetin and J. Chai and J. F. Chang and G. Chelkov and G. Chen and H. S. Chen and J. C. Chen and M L Chen and P. L. Chen and S J Chen and Y.-B. Chen and G. Cibinetto and H. L. Dai and J. P. Dai and A. Dbeyssi and D. Dedovich and Z. Y. DENG and A. DENIG and I. Denysenko and M. Destefanis and F. De Mori and Y. Ding and C. Dong and others},
title = {Evidence of a Resonant Structure in the e+e−→π+D0D*− Cross Section between 4.05 and 4.60 GeV},
journal = {Physical Review Letters},
year = {2019},
volume = {122},
publisher = {American Physical Society (APS)},
month = {mar},
url = {https://doi.org/10.1103/PhysRevLett.122.102002},
number = {10},
pages = {102002},
doi = {10.1103/PhysRevLett.122.102002}
}
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