論文

2022年6月1日

Study of γγ →γψ (2S) at Belle

Physical Review D
  • X. L. Wang
  • B. S. Gao
  • W. J. Zhu
  • I. Adachi
  • H. Aihara
  • S. Al Said
  • D. M. Asner
  • H. Atmacan
  • V. Aulchenko
  • T. Aushev
  • R. Ayad
  • V. Babu
  • S. Bahinipati
  • P. Behera
  • V. Bhardwaj
  • B. Bhuyan
  • T. Bilka
  • J. Biswal
  • A. Bobrov
  • G. Bonvicini
  • A. Bozek
  • M. Bračko
  • M. Campajola
  • D. Červenkov
  • M. C. Chang
  • V. Chekelian
  • A. Chen
  • B. G. Cheon
  • K. Chilikin
  • H. E. Cho
  • K. Cho
  • S. K. Choi
  • Y. Choi
  • S. Choudhury
  • D. Cinabro
  • S. Cunliffe
  • S. Das
  • G. De Nardo
  • R. Dhamija
  • F. Di Capua
  • Z. DoleŽal
  • T. V. Dong
  • S. Eidelman
  • T. Ferber
  • D. Ferlewicz
  • A. Frey
  • B. G. Fulsom
  • R. Garg
  • V. Gaur
  • N. Gabyshev
  • A. Garmash
  • A. Giri
  • P. Goldenzweig
  • B. Golob
  • C. Hadjivasiliou
  • T. Hara
  • O. Hartbrich
  • K. Hayasaka
  • H. Hayashii
  • M. T. Hedges
  • W. S. Hou
  • C. L. Hsu
  • T. Iijima
  • K. Inami
  • A. Ishikawa
  • R. Itoh
  • M. Iwasaki
  • Y. Iwasaki
  • W. W. Jacobs
  • S. Jia
  • Y. Jin
  • C. W. Joo
  • K. K. Joo
  • J. Kahn
  • K. H. Kang
  • T. Kawasaki
  • C. Kiesling
  • C. H. Kim
  • D. Y. Kim
  • S. H. Kim
  • Y. K. Kim
  • P. Kodyš
  • T. Konno
  • A. Korobov
  • S. Korpar
  • E. Kovalenko
  • P. KriŽan
  • R. Kroeger
  • P. Krokovny
  • R. Kulasiri
  • M. Kumar
  • R. Kumar
  • K. Kumara
  • A. Kuzmin
  • Y. J. Kwon
  • K. Lalwani
  • J. S. Lange
  • I. S. Lee
  • S. C. Lee
  • P. Lewis
  • 全て表示

105
11
記述言語
掲載種別
研究論文(学術雑誌)
DOI
10.1103/PhysRevD.105.112011

Using 980 fb-1 of data at and around the I (nS) (n=1, 2, 3, 4, 5) resonances collected with the Belle detector at the KEKB asymmetric-energy e+e-collider, the two-photon process γγ→γψ(2S) is studied from the threshold to 4.2 GeV for the first time. Two structures are seen in the invariant mass distribution of γψ(2S): one at MR1=3922.4±6.5±2.0 MeV/c2 with a width of ΓR1=22±17±4 MeV, and another at MR2=4014.3±4.0±1.5 MeV/c2 with a width of ΓR2=4±11±6 MeV; the signals are parametrized with the incoherent sum of two Breit-Wigner functions. The first structure is consistent with the X(3915) or the χc2(3930), and the local statistical significance is determined to be 3.1σ with the systematic uncertainties included. The second matches none of the known charmonium or charmoniumlike states, and its global significance is determined to be 2.8σ including the look-elsewhere effect. The production rates are ΓγγB(R1→γψ(2S))=9.8±3.6±1.3 eV assuming (JPC,|λ|)=(0++,0) or 2.0±0.7±0.2 eV with (2++,2) for the first structure and ΓγγB(R2→γψ(2S))=6.2±2.2±0.8 eV with (0++,0) or 1.2±0.4±0.2 eV with (2++,2) for the second. Here, the first errors are statistical and the second systematic, and λ is the helicity.

リンク情報
DOI
https://doi.org/10.1103/PhysRevD.105.112011
Scopus
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85134206730&origin=inward
Scopus Citedby
https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85134206730&origin=inward
ID情報
  • DOI : 10.1103/PhysRevD.105.112011
  • ISSN : 2470-0010
  • eISSN : 2470-0029
  • SCOPUS ID : 85134206730

エクスポート
BibTeX RIS