Observation of the Y(4230) and evidence for a new vector charmoniumlike state Y(4710)ine+e−→KS0KS0J/ψ

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Observation of the Y(4230) and evidence for a new vector charmoniumlike state Y(4710)ine+e−→KS0KS0J/ψ. / BESIII Collaboration ; Мучной, Николай Юрьевич ; Николаев, Иван Борисович.

In: Physical Review D, Vol. 107, No. 9, 092005, 08.05.2023.

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

BibTeX

@article{3365a0a3142049e0a163a732038ee856,

title = "Observation of the Y(4230) and evidence for a new vector charmoniumlike state Y(4710)ine+e−→KS0KS0J/ψ",

abstract = "Cross sections for the process e+e-→KS0KS0J/ψ at center-of-mass energies from 4.128 to 4.950 GeV are measured using data samples with a total integrated luminosity of 21.2 fb-1 collected by the BESIII detector operating at the BEPCII storage ring. The Y(4230) state is observed in the energy dependence of the e+e-→KS0KS0J/ψ cross section for the first time with a statistical significance of 26.0σ. In addition, an enhancement around 4.710 GeV, labeled as the Y(4710), is seen with a statistical significance of 4.2σ. There is no clear structure around 4.484 GeV. Using a fit with a coherent sum of three Breit-Wigner functions, we determine the mass and width of the Y(4230) state to be 4226.9±6.6±22.0 MeV/c2 and 71.7±16.2±32.8 MeV, respectively, and the mass and width of the Y(4710) state to be 4704.0±52.3±69.5 MeV/c2 and 183.2±114.0±96.1 MeV, respectively, where the first uncertainties are statistical and the second are systematic. In addition, the average Born cross section ratio σBorn(e+e-→KS0KS0J/ψ)σBorn(e+e-→K+K-J/ψ) is measured to be 0.388-0.028+0.035±0.016, or 0.426-0.031+0.038±0.018 if three-body phase space is considered.",

author = "{BESIII Collaboration} and M. Ablikim and M. n. Achasov and Мучной, {Николай Юрьевич} and Николаев, {Иван Борисович}",

note = "Observation of the Y(4230) and evidence for a new vector charmoniumlike state Y(4710) in e+e−→KS0KS0J/ψ / BESIII Collaboration // Physical Review D. – 2023. – Vol. 107, No. 9. – P. 092005. – DOI 10.1103/physrevd.107.092005. ",

year = "2023",

month = may,

day = "8",

doi = "10.1103/PhysRevD.107.092005",

language = "English",

volume = "107",

journal = "Physical Review D",

issn = "2470-0010",

publisher = "American Physical Society",

number = "9",

}

RIS

TY - JOUR

T1 - Observation of the Y(4230) and evidence for a new vector charmoniumlike state Y(4710)ine+e−→KS0KS0J/ψ

AU - BESIII Collaboration

AU - Ablikim, M.

AU - Achasov, M. n.

AU - Мучной, Николай Юрьевич

AU - Николаев, Иван Борисович

N1 - Observation of the Y(4230) and evidence for a new vector charmoniumlike state Y(4710) in e+e−→KS0KS0J/ψ / BESIII Collaboration // Physical Review D. – 2023. – Vol. 107, No. 9. – P. 092005. – DOI 10.1103/physrevd.107.092005.

PY - 2023/5/8

Y1 - 2023/5/8

N2 - Cross sections for the process e+e-→KS0KS0J/ψ at center-of-mass energies from 4.128 to 4.950 GeV are measured using data samples with a total integrated luminosity of 21.2 fb-1 collected by the BESIII detector operating at the BEPCII storage ring. The Y(4230) state is observed in the energy dependence of the e+e-→KS0KS0J/ψ cross section for the first time with a statistical significance of 26.0σ. In addition, an enhancement around 4.710 GeV, labeled as the Y(4710), is seen with a statistical significance of 4.2σ. There is no clear structure around 4.484 GeV. Using a fit with a coherent sum of three Breit-Wigner functions, we determine the mass and width of the Y(4230) state to be 4226.9±6.6±22.0 MeV/c2 and 71.7±16.2±32.8 MeV, respectively, and the mass and width of the Y(4710) state to be 4704.0±52.3±69.5 MeV/c2 and 183.2±114.0±96.1 MeV, respectively, where the first uncertainties are statistical and the second are systematic. In addition, the average Born cross section ratio σBorn(e+e-→KS0KS0J/ψ)σBorn(e+e-→K+K-J/ψ) is measured to be 0.388-0.028+0.035±0.016, or 0.426-0.031+0.038±0.018 if three-body phase space is considered.

AB - Cross sections for the process e+e-→KS0KS0J/ψ at center-of-mass energies from 4.128 to 4.950 GeV are measured using data samples with a total integrated luminosity of 21.2 fb-1 collected by the BESIII detector operating at the BEPCII storage ring. The Y(4230) state is observed in the energy dependence of the e+e-→KS0KS0J/ψ cross section for the first time with a statistical significance of 26.0σ. In addition, an enhancement around 4.710 GeV, labeled as the Y(4710), is seen with a statistical significance of 4.2σ. There is no clear structure around 4.484 GeV. Using a fit with a coherent sum of three Breit-Wigner functions, we determine the mass and width of the Y(4230) state to be 4226.9±6.6±22.0 MeV/c2 and 71.7±16.2±32.8 MeV, respectively, and the mass and width of the Y(4710) state to be 4704.0±52.3±69.5 MeV/c2 and 183.2±114.0±96.1 MeV, respectively, where the first uncertainties are statistical and the second are systematic. In addition, the average Born cross section ratio σBorn(e+e-→KS0KS0J/ψ)σBorn(e+e-→K+K-J/ψ) is measured to be 0.388-0.028+0.035±0.016, or 0.426-0.031+0.038±0.018 if three-body phase space is considered.

UR - https://www.elibrary.ru/item.asp?id=61449419

UR - https://www.mendeley.com/catalogue/c4b0040a-6a6a-3bf5-8592-fa3ba63f65f7/

U2 - 10.1103/PhysRevD.107.092005

DO - 10.1103/PhysRevD.107.092005

M3 - Article

VL - 107

JO - Physical Review D

JF - Physical Review D

SN - 2470-0010

IS - 9

M1 - 092005

ER -

ID: 68344877