Search for a doubly charged DDK bound state in ϒ (1S, 2S) inclusive decays and via direct production in e+e- collisions at s =10.520, 10.580, and 10.867 GeV SEARCH for A DOUBLY CHARGED DDK BOUND STATE in ... LI Y. et al.

Authors

Y. Li, Beihang University
S. Jia, Fudan 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
T. Aushev, National Research University Higher School of Economics
R. Ayad, University of Tabuk
V. Babu, Deutsches Elektronen-Synchrotron (DESY)
S. Bahinipati, Indian Institute of Technology Bhubaneswar
P. Behera, Indian Institute of Technology Madras
K. Belous, Institut fiziki vysokikh energii
J. Bennett, University of Mississippi
M. Bessner, University of Hawaiʻi at Mānoa
V. Bhardwaj, Indian Institute of Science Education and Research Mohali
B. Bhuyan, Indian Institute of Technology Guwahati
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
M. C. Chang, Fu Jen Catholic 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. J. Cho, Yonsei University

Document Type

Article

Publication Date

12-1-2020

Abstract

© 2020 authors. Published by the American Physical Society. We report the results of a first search for a doubly charged DDK bound state, denoted the R++, in ϒ(1S) and ϒ(2S) inclusive decays and via direct production in e+e- collisions at s=10.520, 10.580, and 10.867 GeV. The search uses data accumulated with the Belle detector at the KEKB asymmetric-energy e+e- collider. No significant signals are observed in the D+Ds∗+ invariant-mass spectra of all studied modes. The 90% credibility level upper limits on their product branching fractions in ϒ(1S) and ϒ(2S) inclusive decays (B(ϒ(1S, 2S)→R+++anything)×B(R++→D+Ds∗+)), the product values of Born cross section and branching fraction in e+e- collisions (σ(e+e-→R+++anything)×B(R++→D+Ds∗+)) at s=10.520, 10.580, and 10.867 GeV under different assumptions of R++ masses varying from 4.13 to 4.17 GeV/c2 and widths varying from 0 to 5 MeV are obtained.

Relational Format

journal article

Recommended Citation

Li, Y., Jia, S., Shen, C. P., Adachi, I., Aihara, H., Al Said, S., Asner, D. M., Aushev, T., Ayad, R., Babu, V., Bahinipati, S., Behera, P., Belous, K., Bennett, J., Bessner, M., Bhardwaj, V., Bhuyan, B., Bilka, T., Biswal, J., … The Belle Collaboration. (2020). Search for a doubly charged D D K bound state in ϒ ( 1 S , 2 S ) inclusive decays and via direct production in e + e − collisions at s = 10.520 , 10.580, and 10.867 GeV. Physical Review D, 102(11), 112001. https://doi.org/10.1103/PhysRevD.102.112001