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Study of γγ →γψ (2S) at Belle

Publication ,  Journal Article
Wang, XL; Gao, BS; Zhu, WJ; Adachi, I; Aihara, H; Al Said, S; Asner, DM; Atmacan, H; Aulchenko, V; Aushev, T; Ayad, R; Babu, V; Bahinipati, S ...
Published in: Physical Review D
June 1, 2022

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.

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Published In

Physical Review D

DOI

EISSN

2470-0029

ISSN

2470-0010

Publication Date

June 1, 2022

Volume

105

Issue

11
 

Citation

APA
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MLA
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Wang, X. L., Gao, B. S., Zhu, W. J., Adachi, I., Aihara, H., Al Said, S., … Lewis, P. (2022). Study of γγ →γψ (2S) at Belle. Physical Review D, 105(11). https://doi.org/10.1103/PhysRevD.105.112011
Wang, X. L., B. S. Gao, W. J. Zhu, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, et al. “Study of γγ →γψ (2S) at Belle.” Physical Review D 105, no. 11 (June 1, 2022). https://doi.org/10.1103/PhysRevD.105.112011.
Wang XL, Gao BS, Zhu WJ, Adachi I, Aihara H, Al Said S, et al. Study of γγ →γψ (2S) at Belle. Physical Review D. 2022 Jun 1;105(11).
Wang, X. L., et al. “Study of γγ →γψ (2S) at Belle.” Physical Review D, vol. 105, no. 11, June 2022. Scopus, doi:10.1103/PhysRevD.105.112011.
Wang XL, Gao BS, Zhu WJ, Adachi I, Aihara H, Al Said S, Asner DM, Atmacan H, Aulchenko V, Aushev T, Ayad R, Babu V, Bahinipati S, Behera P, Bhardwaj V, Bhuyan B, Bilka T, Biswal J, Bobrov A, Bonvicini G, Bozek A, Bračko M, Campajola M, Červenkov D, Chang MC, Chekelian V, Chen A, Cheon BG, Chilikin K, Cho HE, Cho K, Choi SK, Choi Y, Choudhury S, Cinabro D, Cunliffe S, Das S, De Nardo G, Dhamija R, Di Capua F, DoleŽal Z, Dong TV, Eidelman S, Ferber T, Ferlewicz D, Frey A, Fulsom BG, Garg R, Gaur V, Gabyshev N, Garmash A, Giri A, Goldenzweig P, Golob B, Hadjivasiliou C, Hara T, Hartbrich O, Hayasaka K, Hayashii H, Hedges MT, Hou WS, Hsu CL, Iijima T, Inami K, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Jacobs WW, Jia S, Jin Y, Joo CW, Joo KK, Kahn J, Kang KH, Kawasaki T, Kiesling C, Kim CH, Kim DY, Kim SH, Kim YK, Kodyš P, Konno T, Korobov A, Korpar S, Kovalenko E, KriŽan P, Kroeger R, Krokovny P, Kulasiri R, Kumar M, Kumar R, Kumara K, Kuzmin A, Kwon YJ, Lalwani K, Lange JS, Lee IS, Lee SC, Lewis P. Study of γγ →γψ (2S) at Belle. Physical Review D. 2022 Jun 1;105(11).

Published In

Physical Review D

DOI

EISSN

2470-0029

ISSN

2470-0010

Publication Date

June 1, 2022

Volume

105

Issue

11