Open Access
Precision Measurement of the
e + e − → Λ c + Λ ¯ c −
M. ABLIKIM
,
M. N. ACHASOV
,
S. Ahmed
,
M Albrecht
,
M. Albrecht
,
M. Alekseev
,
A. Amoroso
,
F. F. An
,
Q. An
,
J. Z. BAI
,
Y. Bai
,
O. Bakina
,
R. Baldini Ferroli
,
Y. BAN
,
K. Begzsuren
,
D. W. Bennett
,
J V Bennett
,
N. Berger
,
M. Bertani
,
D. Bettoni
,
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
,
M L Chen
,
P. L. Chen
,
S J Chen
,
X. R. Chen
,
Y.-B. Chen
,
X. K. Chu
,
G. Cibinetto
,
F. Cossio
,
H. L. Dai
,
J. P. Dai
,
A. Dbeyssi
,
D. Dedovich
,
Z. Y. DENG
,
A. DENIG
,
I. Denysenko
,
M. Destefanis
,
F. De Mori
,
Y. Ding
,
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. Fang
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S. S. Fang
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Y. Fang
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R. Farinelli
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L. Fava
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S. Fegan
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F. Feldbauer
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G. Felici
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C. Q. Feng
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E. Fioravanti
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M. FRITSCH
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C. D. FU
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Q. Gao
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X.-L. Gao
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Y. Gao
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Z. Gao
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B. Garillon
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I. Garzia
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A Gilman
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K. Goetzen
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T. Holtmann
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J. F. Hu
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J.-C. Li
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J. W. Li
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K J Li
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C. X. LIU
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H. M. LIU
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Huanhuan Liu
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J. B. LIU
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J. Y. Liu
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K. Liu
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K. Y. Liu
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L. D. Liu
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Q. Liu
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Y.F. Long
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X. C. Lou
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H. J. Lu
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J. G. Lu
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Y.-p. Lu
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M. X. Luo
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Publication type: Journal Article
Publication date: 2018-03-29
scimago Q1
wos Q1
SJR: 2.856
CiteScore: 15.6
Impact factor: 9.0
ISSN: 00319007, 10797114
PubMed ID:
29694170
General Physics and Astronomy
Abstract
The cross section of the e^{+}e^{-}→Λ_{c}^{+}Λ[over ¯]_{c}^{-} process is measured with unprecedented precision using data collected with the BESIII detector at sqrt[s]=4574.5, 4580.0, 4590.0 and 4599.5 MeV. The nonzero cross section near the Λ_{c}^{+}Λ[over ¯]_{c}^{-} production threshold is cleared. At center-of-mass energies sqrt[s]=4574.5 and 4599.5 MeV, the higher statistics data enable us to measure the Λ_{c} polar angle distributions. From these, the Λ_{c} electric over magnetic form-factor ratios (|G_{E}/G_{M}|) are measured for the first time. They are found to be 1.14±0.14±0.07 and 1.23±0.05±0.03, respectively, where the first uncertainties are statistical and the second are systematic.
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ABLIKIM M. et al. Precision Measurement of the e+e−→Λc+Λ¯c− Cross Section Near Threshold // Physical Review Letters. 2018. Vol. 120. No. 13. 132001
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ABLIKIM M. et al. Precision Measurement of the e+e−→Λc+Λ¯c− Cross Section Near Threshold // Physical Review Letters. 2018. Vol. 120. No. 13. 132001
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@article{2018_ABLIKIM,
author = {M. ABLIKIM and M. N. ACHASOV and S. Ahmed and M Albrecht and M. Albrecht and M. Alekseev and A. Amoroso and F. F. An and Q. An and J. Z. BAI and Y. Bai and O. Bakina and R. Baldini Ferroli and Y. BAN and K. Begzsuren and D. W. Bennett and J V Bennett and N. Berger and M. Bertani and D. Bettoni 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 X. R. Chen and Y.-B. Chen and X. K. Chu and G. Cibinetto and F. Cossio and H. L. Dai and J. P. Dai and A. Dbeyssi and D. Dedovich and Z. Y. DENG and A. DENIG and others},
title = {Precision Measurement of the e+e−→Λc+Λ¯c− Cross Section Near Threshold},
journal = {Physical Review Letters},
year = {2018},
volume = {120},
publisher = {American Physical Society (APS)},
month = {mar},
url = {https://doi.org/10.1103/PhysRevLett.120.132001},
number = {13},
pages = {132001},
doi = {10.1103/PhysRevLett.120.132001}
}
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