Study of the resonance structures in the process e+e- →π+π-J/ψ

BESIII Collaboration; N. Kalantar-Nayestanaki; R. Kappert; M. Kavatsyuk; J. Messchendorp; V. Rodin

doi:10.1103/PhysRevD.106.072001

Study of the resonance structures in the process e+e- →π+π-J/ψ

BESIII Collaboration, N. Kalantar-Nayestanaki, R. Kappert, M. Kavatsyuk, J. Messchendorp, V. Rodin

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Abstract

Using about 23 fb-1 of data collected with the BESIII detector operating at the BEPCII storage ring, a precise measurement of the e+e-→π+π-J/ψ Born cross section is performed at center-of-mass energies from 3.7730 to 4.7008 GeV. Two structures, identified as the Y(4220) and the Y(4320) states, are observed in the energy-dependent cross section with a significance larger than 10σ. The masses and widths of the two structures are determined to be (M,Γ)=(4221.4±1.5±2.0 MeV/c2,41.8±2.9±2.7 MeV) and (M,Γ)=(4298±12±26 MeV/c2,127±17±10 MeV), respectively. A small enhancement around 4.5 GeV with a significance about 3σ, compatible with the ψ(4415), might also indicate the presence of an additional resonance in the spectrum. The inclusion of this additional contribution in the fit to the cross section affects the resonance parameters of the Y(4320) state.

Original language	English
Article number	072004
Journal	Physical Review D
Volume	106
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevD.106.072001
Publication status	Published - 1-Oct-2022

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@article{0d5f4539305c4980b10080412622fd75,

title = "Study of the resonance structures in the process e+e- →π+π-J/ψ",

abstract = "Using about 23 fb-1 of data collected with the BESIII detector operating at the BEPCII storage ring, a precise measurement of the e+e-→π+π-J/ψ Born cross section is performed at center-of-mass energies from 3.7730 to 4.7008 GeV. Two structures, identified as the Y(4220) and the Y(4320) states, are observed in the energy-dependent cross section with a significance larger than 10σ. The masses and widths of the two structures are determined to be (M,Γ)=(4221.4±1.5±2.0 MeV/c2,41.8±2.9±2.7 MeV) and (M,Γ)=(4298±12±26 MeV/c2,127±17±10 MeV), respectively. A small enhancement around 4.5 GeV with a significance about 3σ, compatible with the ψ(4415), might also indicate the presence of an additional resonance in the spectrum. The inclusion of this additional contribution in the fit to the cross section affects the resonance parameters of the Y(4320) state.",

author = "{BESIII Collaboration} and M. Ablikim and Achasov, {M. N.} and N. Kalantar-Nayestanaki and R. Kappert and M. Kavatsyuk and J. Messchendorp and V. Rodin",

note = "Funding Information: The BESIII collaboration thanks the staff of BEPCII and the IHEP computing center for their strong support. This work is supported in part by National Key R&D Program of China under Contracts Nos. 2020YFA0406300, No. 2020YFA0406400; National Natural Science Foundation of China (NSFC) under Contracts No. 11625523, No. 11635010, No. 11735014, No. 11822506, No. 11835012, No. 11935015, No. 11975141, No. 11935016, No. 11935018, No. 11961141012, No. 12022510, No. 12025502, No. 12035009, No. 12035013, No. 12061131003, No. 11875262; the Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program; Joint Large-Scale Scientific Facility Funds of the NSFC and CAS under Contracts No. U1732263, No. U1832207; CAS Key Research Program of Frontier Sciences under Contract No. QYZDJ-SSW-SLH040; 100 Talents Program of CAS; INPAC and Shanghai Key Laboratory for Particle Physics and Cosmology; ERC under Contract No. 758462; European Union Horizon 2020 research and innovation programme under Contract No. Marie Sklodowska-Curie grant agreement No 894790; The Fundamental Research Funds of Shandong University; German Research Foundation DFG under Contracts Nos. 443159800, Collaborative Research Center CRC 1044, FOR 2359, GRK 2149; Istituto Nazionale di Fisica Nucleare, Italy; Ministry of Development of Turkey under Contract No. DPT2006K-120470; National Science and Technology fund; Olle Engkvist Foundation under Contract No. 200-0605; STFC (United Kingdom); The Knut and Alice Wallenberg Foundation (Sweden) under Contract No. 2016.0157; The Royal Society, UK under Contracts No. DH140054, No. DH160214; The Swedish Research Council; U. S. Department of Energy under Contracts No. DE-FG02-05ER41374, No. DE-SC-0012069. Publisher Copyright: {\textcopyright} 2022 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the {"}https://creativecommons.org/licenses/by/4.0/{"}Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.",

year = "2022",

month = oct,

day = "1",

doi = "10.1103/PhysRevD.106.072001",

language = "English",

volume = "106",

journal = "Physical Review D",

issn = "2470-0010",

publisher = "AMER PHYSICAL SOC",

number = "7",

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TY - JOUR

T1 - Study of the resonance structures in the process e+e- →π+π-J/ψ

AU - BESIII Collaboration

AU - Ablikim, M.

AU - Achasov, M. N.

AU - Kalantar-Nayestanaki, N.

AU - Kappert, R.

AU - Kavatsyuk, M.

AU - Messchendorp, J.

AU - Rodin, V.

N1 - Funding Information: The BESIII collaboration thanks the staff of BEPCII and the IHEP computing center for their strong support. This work is supported in part by National Key R&D Program of China under Contracts Nos. 2020YFA0406300, No. 2020YFA0406400; National Natural Science Foundation of China (NSFC) under Contracts No. 11625523, No. 11635010, No. 11735014, No. 11822506, No. 11835012, No. 11935015, No. 11975141, No. 11935016, No. 11935018, No. 11961141012, No. 12022510, No. 12025502, No. 12035009, No. 12035013, No. 12061131003, No. 11875262; the Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program; Joint Large-Scale Scientific Facility Funds of the NSFC and CAS under Contracts No. U1732263, No. U1832207; CAS Key Research Program of Frontier Sciences under Contract No. QYZDJ-SSW-SLH040; 100 Talents Program of CAS; INPAC and Shanghai Key Laboratory for Particle Physics and Cosmology; ERC under Contract No. 758462; European Union Horizon 2020 research and innovation programme under Contract No. Marie Sklodowska-Curie grant agreement No 894790; The Fundamental Research Funds of Shandong University; German Research Foundation DFG under Contracts Nos. 443159800, Collaborative Research Center CRC 1044, FOR 2359, GRK 2149; Istituto Nazionale di Fisica Nucleare, Italy; Ministry of Development of Turkey under Contract No. DPT2006K-120470; National Science and Technology fund; Olle Engkvist Foundation under Contract No. 200-0605; STFC (United Kingdom); The Knut and Alice Wallenberg Foundation (Sweden) under Contract No. 2016.0157; The Royal Society, UK under Contracts No. DH140054, No. DH160214; The Swedish Research Council; U. S. Department of Energy under Contracts No. DE-FG02-05ER41374, No. DE-SC-0012069. Publisher Copyright: © 2022 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.

PY - 2022/10/1

Y1 - 2022/10/1

N2 - Using about 23 fb-1 of data collected with the BESIII detector operating at the BEPCII storage ring, a precise measurement of the e+e-→π+π-J/ψ Born cross section is performed at center-of-mass energies from 3.7730 to 4.7008 GeV. Two structures, identified as the Y(4220) and the Y(4320) states, are observed in the energy-dependent cross section with a significance larger than 10σ. The masses and widths of the two structures are determined to be (M,Γ)=(4221.4±1.5±2.0 MeV/c2,41.8±2.9±2.7 MeV) and (M,Γ)=(4298±12±26 MeV/c2,127±17±10 MeV), respectively. A small enhancement around 4.5 GeV with a significance about 3σ, compatible with the ψ(4415), might also indicate the presence of an additional resonance in the spectrum. The inclusion of this additional contribution in the fit to the cross section affects the resonance parameters of the Y(4320) state.

AB - Using about 23 fb-1 of data collected with the BESIII detector operating at the BEPCII storage ring, a precise measurement of the e+e-→π+π-J/ψ Born cross section is performed at center-of-mass energies from 3.7730 to 4.7008 GeV. Two structures, identified as the Y(4220) and the Y(4320) states, are observed in the energy-dependent cross section with a significance larger than 10σ. The masses and widths of the two structures are determined to be (M,Γ)=(4221.4±1.5±2.0 MeV/c2,41.8±2.9±2.7 MeV) and (M,Γ)=(4298±12±26 MeV/c2,127±17±10 MeV), respectively. A small enhancement around 4.5 GeV with a significance about 3σ, compatible with the ψ(4415), might also indicate the presence of an additional resonance in the spectrum. The inclusion of this additional contribution in the fit to the cross section affects the resonance parameters of the Y(4320) state.

UR - http://www.scopus.com/inward/record.url?scp=85142178143&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.106.072001

DO - 10.1103/PhysRevD.106.072001

M3 - Article

SN - 2470-0010

VL - 106

JO - Physical Review D

JF - Physical Review D

IS - 7

M1 - 072004

ER -

Study of the resonance structures in the process e+e- →π+π-J/ψ

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