Measurement of e+e- →γχc0,c1,c2 cross sections at center-of-mass energies between 3.77 and 4.60 GeV

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Measurement of e+e- →γχc0,c1,c2 cross sections at center-of-mass energies between 3.77 and 4.60 GeV. / BESIII Collaboration.

In: Physical Review D, Vol. 104, No. 9, 092001, 01.11.2021.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{7f105c167afe4c39a35d4b3e4e8f0ae2,

title = "Measurement of e+e- →γχc0,c1,c2 cross sections at center-of-mass energies between 3.77 and 4.60 GeV",

abstract = "The e+e-→γχcJ (J=0, 1, 2) processes are studied at center-of-mass energies ranging from 3.773 to 4.600 GeV, using a total integrated luminosity of 19.3 fb-1 e+e- annihilation data accumulated with the BESIII detector at BEPCII. We observe for the first time e+e-→γχc1,c2 signals at s=4.180 GeV with statistical significances of 7.6σ and 6.0σ, respectively. The production cross section of e+e-→γχc1,c2 at each center-of-mass energy is also measured. We find that the line shape of the e+e-→γχc1 cross section can be described with conventional charmonium states ψ(3686), ψ(3770), ψ(4040), ψ(4160). Compared with this, for the e+e-→γχc2 channel, one more additional resonance is added to describe the cross section line shape. Its mass and width are measured to be M=4371.7±7.5±1.8 MeV/c2 and Γtot=51.1±17.6±1.9 MeV, where the first uncertainties are statistical and the second systematic. The significance of this resonance is estimated to be 5.8σ, and its parameters agree with the Y(4360) resonance previously reported in e+e-→π+π-ψ(3686), and the Y(4390) in e+e-→π+π-hc within uncertainties. No significant signal for the e+e-→γχc0 process is observed, and the upper limits of Born cross sections σB(e+e-→γχc0) at 90% confidence level are reported.",

author = "{BESIII Collaboration} and M. Ablikim and Achasov, {M. N.} and P. Adlarson and S. Ahmed and M. Albrecht and R. Aliberti and A. Amoroso and An, {M. R.} and Q. An and Bai, {X. H.} and Y. Bai and O. Bakina and Ferroli, {R. Baldini} and I. Balossino and Y. Ban and K. Begzsuren and N. Berger and M. Bertani and D. Bettoni and F. Bianchi and J. Bloms and A. Bortone and I. Boyko and Briere, {R. A.} and H. Cai and X. Cai and A. Calcaterra and Cao, {G. F.} and N. Cao and Cetin, {S. A.} and Chang, {J. F.} and Chang, {W. L.} and G. Chelkov and Chen, {D. Y.} and G. Chen and Chen, {H. S.} and Chen, {M. L.} and Chen, {S. J.} and Chen, {X. R.} and Chen, {Y. B.} and Chen, {Z. J.} and Cheng, {W. S.} and G. Cibinetto and F. Cossio and Cui, {X. F.} and Dai, {H. L.} and Dai, {X. C.} and A. Dbeyssi and Muchnoi, {N. Yu} and Nikolaev, {I. B.}",

note = "Publisher Copyright: {\textcopyright} 2021 authors. Published by the American Physical Society.",

year = "2021",

month = nov,

day = "1",

doi = "10.1103/PhysRevD.104.092001",

language = "English",

volume = "104",

journal = "Physical Review D",

issn = "2470-0010",

publisher = "AMER PHYSICAL SOC",

number = "9",

}

RIS

TY - JOUR

T1 - Measurement of e+e- →γχc0,c1,c2 cross sections at center-of-mass energies between 3.77 and 4.60 GeV

AU - BESIII Collaboration

AU - Ablikim, M.

AU - Achasov, M. N.

AU - Adlarson, P.

AU - Ahmed, S.

AU - Albrecht, M.

AU - Aliberti, R.

AU - Amoroso, A.

AU - An, M. R.

AU - An, Q.

AU - Bai, X. H.

AU - Bai, Y.

AU - Bakina, O.

AU - Ferroli, R. Baldini

AU - Balossino, I.

AU - Ban, Y.

AU - Begzsuren, K.

AU - Berger, N.

AU - Bertani, M.

AU - Bettoni, D.

AU - Bianchi, F.

AU - Bloms, J.

AU - Bortone, A.

AU - Boyko, I.

AU - Briere, R. A.

AU - Cai, H.

AU - Cai, X.

AU - Calcaterra, A.

AU - Cao, G. F.

AU - Cao, N.

AU - Cetin, S. A.

AU - Chang, J. F.

AU - Chang, W. L.

AU - Chelkov, G.

AU - Chen, D. Y.

AU - Chen, G.

AU - Chen, H. S.

AU - Chen, M. L.

AU - Chen, S. J.

AU - Chen, X. R.

AU - Chen, Y. B.

AU - Chen, Z. J.

AU - Cheng, W. S.

AU - Cibinetto, G.

AU - Cossio, F.

AU - Cui, X. F.

AU - Dai, H. L.

AU - Dai, X. C.

AU - Dbeyssi, A.

AU - Muchnoi, N. Yu

AU - Nikolaev, I. B.

PY - 2021/11/1

Y1 - 2021/11/1

N2 - The e+e-→γχcJ (J=0, 1, 2) processes are studied at center-of-mass energies ranging from 3.773 to 4.600 GeV, using a total integrated luminosity of 19.3 fb-1 e+e- annihilation data accumulated with the BESIII detector at BEPCII. We observe for the first time e+e-→γχc1,c2 signals at s=4.180 GeV with statistical significances of 7.6σ and 6.0σ, respectively. The production cross section of e+e-→γχc1,c2 at each center-of-mass energy is also measured. We find that the line shape of the e+e-→γχc1 cross section can be described with conventional charmonium states ψ(3686), ψ(3770), ψ(4040), ψ(4160). Compared with this, for the e+e-→γχc2 channel, one more additional resonance is added to describe the cross section line shape. Its mass and width are measured to be M=4371.7±7.5±1.8 MeV/c2 and Γtot=51.1±17.6±1.9 MeV, where the first uncertainties are statistical and the second systematic. The significance of this resonance is estimated to be 5.8σ, and its parameters agree with the Y(4360) resonance previously reported in e+e-→π+π-ψ(3686), and the Y(4390) in e+e-→π+π-hc within uncertainties. No significant signal for the e+e-→γχc0 process is observed, and the upper limits of Born cross sections σB(e+e-→γχc0) at 90% confidence level are reported.

AB - The e+e-→γχcJ (J=0, 1, 2) processes are studied at center-of-mass energies ranging from 3.773 to 4.600 GeV, using a total integrated luminosity of 19.3 fb-1 e+e- annihilation data accumulated with the BESIII detector at BEPCII. We observe for the first time e+e-→γχc1,c2 signals at s=4.180 GeV with statistical significances of 7.6σ and 6.0σ, respectively. The production cross section of e+e-→γχc1,c2 at each center-of-mass energy is also measured. We find that the line shape of the e+e-→γχc1 cross section can be described with conventional charmonium states ψ(3686), ψ(3770), ψ(4040), ψ(4160). Compared with this, for the e+e-→γχc2 channel, one more additional resonance is added to describe the cross section line shape. Its mass and width are measured to be M=4371.7±7.5±1.8 MeV/c2 and Γtot=51.1±17.6±1.9 MeV, where the first uncertainties are statistical and the second systematic. The significance of this resonance is estimated to be 5.8σ, and its parameters agree with the Y(4360) resonance previously reported in e+e-→π+π-ψ(3686), and the Y(4390) in e+e-→π+π-hc within uncertainties. No significant signal for the e+e-→γχc0 process is observed, and the upper limits of Born cross sections σB(e+e-→γχc0) at 90% confidence level are reported.

UR - http://www.scopus.com/inward/record.url?scp=85119206190&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.104.092001

DO - 10.1103/PhysRevD.104.092001

M3 - Article

AN - SCOPUS:85119206190

VL - 104

JO - Physical Review D

JF - Physical Review D

SN - 2470-0010

IS - 9

M1 - 092001

ER -

ID: 34679025