Journal
PHYSICAL REVIEW D
Volume 105, Issue 3, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.105.032002
Keywords
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Funding
- Ministry of Education, Culture, Sports, Science, and Technology (MEXT) of Japan
- Japan Society for the Promotion of Science (JSPS)
- Tau-Lepton Physics Research Center of Nagoya University
- Australian Research Council [DP180102629, DP170102389, DP170102204, DP150103061, FT130100303]
- Austrian Federal Ministry of Education, Science and Research (FWF)
- FWF Austrian Science Fund [P 31361-N36]
- National Natural Science Foundation of China [11675166, 11705209, 11975076, 12135005, 12175041, 12161141008]
- Key Research Program of Frontier Sciences, Chinese Academy of Sciences (CAS) [QYZDJ-SSW-SLH011]
- Shanghai Science and Technology Committee (STCSM) [19ZR1403000]
- Ministry of Education, Youth and Sports of the Czech Republic [LTT17020]
- Horizon 2020 ERC Advanced Grant (European Union) [884719]
- ERC (European Union) [947006]
- Carl Zeiss Foundation
- Deutsche Forschungsgemeinschaft
- VolkswagenStiftung
- Department of Atomic Energy of India [RTI 4002]
- Department of Science and Technology of India
- Istituto Nazionale di Fisica Nucleare of Italy
- National Research Foundation (NRF) of Korea [2016R1D1A1B01010135, 2016R1D1A1B02012900, 2018R1A2B3003643, 2018R1A6A1A06024970, 2019K1A3A7A09033840, 2019R1I1A3A01058933, 2021R1A6A1A03043957, 2021R1F1A1060423, 2021R1F1A1064008]
- Polish Ministry of Science and Higher Education
- Polish National Science Center
- Ministry of Science and Higher Education of the Russian Federation [14.W03.31.0026]
- HSE University Basic Research Program, Moscow
- University of Tabuk (Saudi Arabia) [S-1440-0321, S-0256-1438, S-0280-1439]
- Slovenian Research Agency [J1-9124, P1-0135]
- Ikerbasque, Basque Foundation for Science, Spain
- Swiss National Science Foundation
- Ministry of Education of Taiwan
- Ministry of Science and Technology of Taiwan
- United States Department of Energy
- United States National Science Foundation
- KREONET/GLORIAD
- Radiation Science Research Institute
- Foreign Large-size Research Facility Application Supporting project
- Global Science Experimental Data Hub Center of the Korea Institute of Science and Technology Information
- Excellence Cluster Universe
- National Research Foundation of Korea [2021R1A6A1A03043957, 2021R1F1A1060423, 2021R1F1A1064008] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- European Research Council (ERC) [947006] Funding Source: European Research Council (ERC)
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A search for the double-heavy tetraquark state candidates Xcc(x) over bar(s) over bar decaying to Ds+Ds+ and D-s*+D-s(*)+ is conducted for the first time using large data samples. No significant signals are observed, and constraints on the product branching fractions and Born cross sections are obtained.
A search for double-heavy tetraquark state candidates Xcc (x) over bar(s) over bar decaying to Ds+Ds+ and D-s*+D-s(*)+ is presented for the first time using the data samples of 102 x 106 Gamma and 158 x 10(6) Gamma(2S) events, and the data samples at root s = 10.52, 10.58, and 10.867 GeV corresponding to integrated luminosities of 89.5, 711.0, and 121.4 fb(-1), respectively, accumulated with the Belle detector at the KEKB asymmetric energy electron-positron collider. The invariant-mass spectra of the Ds+Ds+ and Ds*+Ds*+ are studied to search for possible resonances. No significant signals are observed, and the 90% confidence level upper limits on the product branching fractions [B(Gamma(1S, 2S) -> X-cc (x) over bar(s) over bar + anything) x B(X-cc (x) over bar(s) over bar Ds+Ds+(Ds*+Ds*+))] Gamma(1S, 2S) inclusive decays and the product values of Born cross section and branching fraction [sigma(e(+)e(-) -> Xcc (x) over bar(s) over bar + anythin) x B(Xcc (x) over bar(s) over bar -> Ds+Ds+(Ds*+Ds*+))] in e(+)e(-) collisions at root s = 10.52, 10.58, and 10.867 GeV under different assumptions of Xcc (x) over bar(s) over bar masses and widths are obtained.
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