Evidence for a vector charmoniumlike state in e+e- → Ds+ Ds2∗ (2573)-+ c. c.

Authors

S. Jia, Beihang University
C. P. Shen, Fudan University
I. Adachi, The Graduate University for Advanced Studies
H. Aihara, The University of Tokyo
S. Al Said, King Abdulaziz University
D. M. Asner, Brookhaven National Laboratory
H. Atmacan, University of Cincinnati
V. Aulchenko, Budker Institute of Nuclear Physics of the Siberian Branch of the RAS
T. Aushev, National Research University Higher School of Economics
R. Ayad, University of Tabuk
I. Badhrees, King Abdulaziz City for Science and Technology
P. Behera, Indian Institute of Technology Madras
K. Belous, Institut fiziki vysokikh energii
J. Bennett, University of Mississippi
D. Besson, National Research Nuclear University MEPhI
V. Bhardwaj, Indian Institute of Science Education and Research Mohali
T. Bilka, Charles University
J. Biswal, Jozef Stefan Institute
G. Bonvicini, Wayne State University
A. Bozek, Henryk Niewodniczanski Institute of Nuclear Physics of the Polish Academy of Sciences
M. Bračko, Jozef Stefan Institute
T. E. Browder, University of Hawaiʻi at Mānoa
M. Campajola, Istituto Nazionale di Fisica Nucleare, Sezione di Napoli
D. Červenkov, Charles University
P. Chang, National Taiwan University
A. Chen, National Central University Taiwan
B. G. Cheon, Hanyang University
K. Chilikin, P.N. Lebedev Physical Institute of the Russian Academy of Sciences
K. Cho, Korea Institute of Science and Technology Information
S. K. Choi, Gyeongsang National University
Y. Choi, Sungkyunkwan University
S. Choudhury, Indian Institute of Technology Hyderabad

Document Type

Article

Publication Date

5-1-2020

Abstract

© 2020 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. We report the measurement of e+e-→Ds+Ds2∗(2573)-+c.c. via initial-state radiation using a data sample of an integrated luminosity of 921.9 fb-1 collected with the Belle detector at the γ(4S) and nearby. We find evidence for an enhancement with a 3.4σ significance in the invariant mass of Ds+Ds2∗(2573)-+c.c. The measured mass and width are (4619.8-8.0+8.9(stat.)±2.3(syst.)) MeV/c2 and (47.0-14.8+31.3(stat.)±4.6(syst.)) MeV, respectively. The mass, width, and quantum numbers of this enhancement are consistent with the charmoniumlike state at 4626 MeV/c2 recently reported by Belle in e+e-→Ds+Ds1(2536)-+c.c. The product of the e+e-→Ds+Ds2∗(2573)-+c.c. cross section and the branching fraction of Ds2∗(2573)-→D¯0K- is measured from Ds+Ds2∗(2573)- threshold to 5.6 GeV.

Relational Format

journal article

Recommended Citation

Jia, S., Shen, C. P., Adachi, I., Aihara, H., Al Said, S., Asner, D. M., Atmacan, H., Aulchenko, V., Aushev, T., Ayad, R., Badhrees, I., Behera, P., Belous, K., Bennett, J., Besson, D., Bhardwaj, V., Bilka, T., Biswal, J., Bonvicini, G., … Belle Collaboration. (2020). Evidence for a vector charmoniumlike state in e + e − → D s + D s 2 * ( 2573 ) − + c . c . Physical Review D, 101(9), 091101. https://doi.org/10.1103/PhysRevD.101.091101