Open Access
Open access
volume 96 issue 9 publication number 092007

Improved measurements of two-photon widths of the χcJ states and helicity analysis for χc2γγ

M. ABLIKIM
M. N. ACHASOV
S. Ahmed
M Albrecht
M. Albrecht
A. Amoroso
F. F. An
Q. An
J. Z. BAI
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
M L Chen
S J Chen
X. R. Chen
Y.-B. Chen
X. K. Chu
G. Cibinetto
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
J. Dong
L. Y. Dong
M. Y. Dong
O. Dorjkhaidav
Z.L. Dou
S. X. DU
P. F. Duan
J. Z. Fan
J. Fang
S. S. Fang
X. Fang
Y. Fang
R. Farinelli
L. Fava
S. Fegan
F. Feldbauer
G. Felici
C. Q. Feng
E. Fioravanti
M. FRITSCH
C. D. FU
Q. Gao
X.-L. Gao
Y. Gao
Y. G. Gao
Z. Gao
I. Garzia
K. Goetzen
L. Gong
W. X. Gong
W. Gradl
M. GRECO
M. H. Gu
S. Gu
Y. T. Gu
A. Q. Guo
L. B. GUO
R. P. Guo
Y. P. Guo
Z. Haddadi
S Han
X. Q. Hao
F. A. HARRIS
K. L. HE
X. Q. He
F. H. Heinsius
T. Held
Y. K. HENG
T. Holtmann
Z. L. Hou
C Hu
H. M. HU
T. Hu
Y. Hu
G. S. HUANG
J.‐S. Huang
X.-T. Huang
X.-Z. Huang
Z. L. Huang
T. Hussain
W. Ikegami Andersson
Q. Ji
Q. P. Ji
X. B. Ji
X. L. Ji
X. S. Jiang
X. Y. Jiang
J. B. JIAO
Z Jiao
D. P. JIN
S. Jin
Y. Jin
T. Johansson
A. Julin
N. KALANTAR-NAYESTANAKI
X. L. Kang
X. S. Kang
M. Kavatsyuk
B. C. Ke
T. Khan
A. KHOUKAZ
P. Kiese
R. Kliemt
L. Koch
O. B. Kolcu
B. Kopf
M. Kornicer
M. Kuemmel
M Kuhlmann
A. Kupsc
W. KÜHN
J. S. LANGE
M. Lara
P. Larin
L. Lavezzi
H. Leithoff
C. Leng
C. Li
Cheng Li
D. M. Li
F. Li
F. Y. Li
G. Li
H. B. Li
H. J. Li
J.-C. Li
Jin Li
K Li
K J Li
Lei Li
P. L. Li
P. R. Li
Q. Y. Li
T Li
T. Li
W. D. LI
W. G. LI
X. L. Li
X. N. LI
X. Q. Li
Z. B. LI
H. Liang
Y. F. Liang
Y T Liang
G. R. Liao
D. X. Lin
B. Liu
B. J. LIU
C. X. LIU
D. Liu
F. H. Liu
Fang Liu
Fang Liu
Feng Liu
H. B. LIU
H. H. Liu
H. M. LIU
J. B. LIU
J.-P. LIU
J. Y. Liu
K. Liu
K. Y. Liu
Ke Liu
L. D. Liu
P. L. Liu
Q. Liu
S. B. Liu
X. Liu
Y. B. Liu
Y. Y. Liu
Z. A. LIU
Zhiqing Liu
Y.F. Long
X. C. Lou
H. J. Lu
J. G. Lu
Y Lü
Y. Lu
Y.-p. Lu
C. L. LUO
M. X. Luo
X.‐L. Luo
X. R. Lyu
F. C. MA
H. L. MA
L L Ma
M. M. Ma
Q. M. MA
T. Ma
X. N. Ma
X. Y. Ma
Y. M. Ma
F. E. Maas
M. Maggiora
Q. A. Malik
Y. J. Mao
Z. P. Mao
S. Marcello
Z. X. Meng
J. G. MESSCHENDORP
G. Mezzadri
J. Min
T. J. Min
R E Mitchell
X. H. Mo
Y. J. Mo
C. Morales Morales
G. Morello
N. Yu. MUCHNOI
H. Muramatsu
P. Musiol
A Mustafa
Y. Nefedov
F. Nerling
I. B. NIKOLAEV
Z. Ning
S. Nisar
S.L. Niu
X. Y. Niu
S. L. Olsen
Q. Ouyang
S. Pacetti
Y Pan
Y. Pan
P. Patteri
M. Pelizaeus
J. Pellegrino
H. P. Peng
K. Peters
J. PETTERSSON
J. L. PING
R. G. PING
R. Poling
Prasad V
H. R. Qi
M. Qi
S. Qian
C F. Qiao
J. J. Qin
N. QIN
X. S. Qin
Z. H. Qin
J. F. QIU
K. H. Rashid
C. F. Redmer
M. Richter
M. Ripka
M. Rolo
G. RONG
Ch. Rosner
X. D. RUAN
A. SARANTSEV
M. Savrié
C. Schnier
K. Schoenning
W. Shan
M. Shao
C. P. Shen
P. X. Shen
X. Y. SHEN
H. Y. SHENG
J. J. Song
X. Y. Song
S. Sosio
C Sowa
S. Spataro
G. X. Sun
J. F. SUN
L. Sun
S‐S. Sun
X. H. Sun
Y. J. Sun
Y.-K. Sun
Y. Z. SUN
Z. J. Sun
Z. T. Sun
C. J. Tang
G. Y. Tang
X. Tang
I. Tapan
M. Tiemens
B. T. Tsednee
I. Uman
G. S. Varner
B. Wang
B. L. Wang
D. Wang
D. Y. Wang
Dan Wang
K. Wang
L. L. WANG
L. S. Wang
M Wang
P. Wang
P. L. WANG
W. P. Wang
X. F. Wang
Y. D. Wang
Y. F. Wang
Y. Q. Wang
Z Wang
Z. Wang
Z G Wang
Z.-H. Wang
Z. Y. Wang
T. Weber
D. H. Wei
P. Weidenkaff
S. P. Wen
U. WIEDNER
M. WOLKE
L.H. Wu
L. J. Wu
Z. Wu
L. Xia
Y. Xia
D. XIAO
H. Xiao
Y.J. Xiao
Z. J. Xiao
Y. G. Xie
Y. H. Xie
X. A. Xiong
Q. L. Xiu
G. F. XU
J. J. Xu
L. Xu
Q. J. XU
Q. N. Xu
X. P. XU
L. Yan
W. B. YAN
W. C. Yan
Y. H. Yan
H. J. YANG
H. X. YANG
L. Yang
Y-H. Yang
Y H Yang
Y. X. Yang
M. Ye
M. H. YE
J. -H Yin
Z. Y. You
B.X. YU
C. X. YU
J. S. Yu
C. Z. Yuan
Y. Yuan
A. Yuncu
A. A. Zafar
Y. Zeng
Z. Zeng
B. X. ZHANG
B. Y. ZHANG
C. C. Zhang
D. H. ZHANG
H. H. ZHANG
H. Y. Zhang
J. Zhang
J. L. Zhang
J. Q. Zhang
J. W. Zhang
J Y Zhang
J. Z. Zhang
K. Zhang
L. Zhang
S. Q. Zhang
X. Y. Zhang
Y Zhang
Y. Zhang
Y. H. Zhang
Y. T. Zhang
Yu Zhang
Z. H. Zhang
Z. P. Zhang
Z. Y. Zhang
G. Zhao
J. W. ZHAO
J. Y. Zhao
J. Z. Zhao
Lei Zhao
Ling Zhao
M. G. ZHAO
Q. Zhao
S.J. Zhao
T. C. Zhao
Y. B. Zhao
Z. G. ZHAO
B. Zheng
J. P. Zheng
W. J. Zheng
Y. H. Zheng
B. ZHONG
L. Zhou
X. Zhou
X. K. Zhou
X.-R. ZHOU
X. Y. Zhou
Y. X. Zhou
J Zhu
K. Zhu
K. J. Zhu
S Zhu
S.-H. Zhu
X L Zhu
Y. C. Zhu
Y. S. Zhu
Z. A. ZHU
J. Zhuang
L. Zotti
B. S. ZOU
J. H. Zou
Publication typeJournal Article
Publication date2017-11-28
scimago Q1
wos Q1
SJR1.458
CiteScore9.0
Impact factor5.3
ISSN24700010, 24700029, 05562821, 10894918, 15507998, 15502368
Abstract
Based on 448.1 x 10(6) Psi(3686) events collected with the BESIII detector, the decays Psi(3686) -> gamma chi(cJ), chi(cJ) -> gamma gamma(J = 0, 1, 2) are studied. The decay branching fractions of chi(c0,2) -> gamma gamma are measured to be B(chi(c0) -> gamma gamma) = (1.93 +/- 0.08 +/- 0.05 +/- 0.05) x 10(-4) and B(chi(c2) -> gamma gamma) = (3.10 +/- 0.09 +/- 0.07 +/- 0.11) x 10(-4) which correspond to two-photon decay widths of Gamma(gamma gamma)(chi(c0)) = 2.03 +/- 0.08 +/- 0.06 +/- 0.13 keV and Gamma(gamma gamma)(chi(c2)) = 0.60 +/- 0.02 +/- 0.01 +/- 0.04 keV with a ratio of R = Gamma(gamma gamma)(chi(c2))/Gamma(gamma gamma)(chi(c0)) = 0.295 +/- 0.014 +/- 0.007 +/- 0.027, where the uncertainties are statistical, systematic and associated with the uncertainties of B(Psi(3686) -> gamma chi(c0,2)) and the total widths Gamma(chi(c0,2)), respectively. For the forbidden decay of chi(c1) -> gamma gamma, no signal is observed, and an upper limit on the two-photon width is obtained to be Gamma(gamma gamma)(chi(c1)) gamma gamma is also measured to be f(0/2) = Gamma(lambda=0)(gamma gamma) (chi(c2))/Gamma(lambda=2)(gamma gamma) (chi(c2)) = (0.0 +/- 0.6 +/- 1.2) x 10(-2), where the uncertainties are statistical and systematic, respectively.
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ABLIKIM M. et al. Improved measurements of two-photon widths of the χcJ states and helicity analysis for χc2→γγ // Physical Review D. 2017. Vol. 96. No. 9. 092007
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ABLIKIM M. et al. Improved measurements of two-photon widths of the χcJ states and helicity analysis for χc2→γγ // Physical Review D. 2017. Vol. 96. No. 9. 092007
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@article{2017_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 J. Z. BAI 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 S J Chen and X. R. Chen and Y.-B. Chen and X. K. Chu 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 others},
title = {Improved measurements of two-photon widths of the χcJ states and helicity analysis for χc2→γγ},
journal = {Physical Review D},
year = {2017},
volume = {96},
publisher = {American Physical Society (APS)},
month = {nov},
url = {https://doi.org/10.1103/PhysRevD.96.092007},
number = {9},
pages = {092007},
doi = {10.1103/PhysRevD.96.092007}
}