期刊
PHYSICS LETTERS B
卷 808, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.physletb.2020.135578
关键词
CMS; Upsilon
资金
- FWF (Austria)
- FNRS (Belgium)
- FWO (Belgium)
- CNPq (Brazil)
- CAPES (Brazil)
- FAPERJ (Brazil)
- FAPERGS (Brazil)
- FAPESP (Brazil)
- MES (Bulgaria)
- MOST (China)
- NSFC (China)
- COLCIENCIAS (Colombia)
- CSF (Croatia)
- SENESCYT (Ecuador)
- MoER (Estonia)
- ERDF (Estonia)
- Academy of Finland (Finland)
- MEC (Finland)
- CEA (Finland)
- CNRS/IN2P3 (France)
- BMBF (Germany)
- DFG (Germany)
- HGF (Germany)
- GSRT (Greece)
- NKFIA (Hungary)
- DAE (India)
- DST (India)
- IPM (Iran)
- SFI (Ireland)
- INFN (Italy)
- NRF (Republic of Korea)
- MES (Latvia)
- MOE (Malaysia)
- UM (Malaysia)
- BUAP (Mexico)
- CONACYT (Mexico)
- UASLP-FAI (Mexico)
- FCT (Portugal)
- JINR (Dubna)
- RFBR (Russia)
- MESTD (Serbia)
- SEIDI (Spain)
- FEDER (Spain)
- Swiss Funding Agencies (Switzerland)
- NSTDA (Thailand)
- TUBITAK (Turkey)
- NASU (Ukraine)
- DOE (USA)
- NSF (USA)
- Marie-Curie program
- European Research Council
- Horizon 2020 Grant [675440, 752730, 765710]
- Leventis Foundation
- Alfred P. Sloan Foundation
- Alexander von Humboldt Foundation
- Belgian Federal Science Policy Office
- Fonds pour la Formation a la Recherche dans l'Industrie et dans l'Agriculture (FRIA-Belgium)
- Agentschap voor Innovatie door Wetenschap en Technologie (IWT-Belgium)
- F.R.S. -FNRSand FWO (Belgium) under the Excellence of Science -EOS [30820817]
- Beijing Municipal Science and Technology Commission [Z191100007219010]
- Ministry of Education, Youth and Sports (MEYS) of the Czech Republic
- Deutsche Forschungsgemeinschaft (DFG) under Germany's Excellence Strategy [EXC 2121, 390833306]
- Janos Bolyai Research Scholarship of the Hungarian Academy of Sciences [123842, 123959, 124845, 124850, 125105, 128713, 128786, 129058]
- Council of Science and Industrial Research, India
- HOMING PLUS program of the Foundation for Polish Science
- European Union, Regional Development Fund [Harmonia 2014/14/M/ST2/00428, 2014/13/B/ST2/02543, 2014/15/B/ST2/03998, 2015/19/B/ST2/02861]
- Sonata-bis [2012/07/E/ST2/01406]
- National Priorities Research Program by Qatar National Research Fund
- Ministry of Science and Education [14, W03.31.0026]
- Programa Estatal de Fomento de la Investigacion Cientifica y Tecnica de Excelencia Maria de Maeztu [MDM-2015-0509]
- Programa Severo Ochoa del Principado de Asturias
- Thalis and Aristeia programs
- EU-ESF
- Greek NSRF
- Rachadapisek Sompot Fund for Postdoctoral Fellowship, Chulalongkorn University
- Kavli Foundation
- Nvidia Corporation
- SuperMicro Corporation
- Welch Foundation [C-1845]
- Weston Havens Foundation (USA)
- TAEK (Turkey)
- BMBWF (Austria)
- CERN (China)
- CAS (China)
- MSES (Croatia)
- RPF (Cyprus)
- ERC (Estonia)
- IUT (Estonia)
- PUT (Estonia)
- HIP (Finland)
- CEA (France)
- BMBF(Germany)
- STFC [ST/K003542/1, ST/S00078X/1, ST/M004775/1, ST/L005603/1, ST/S000739/1, ST/N001273/1, ST/K001639/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/K003542/1, ST/L005603/1, ST/K001639/1, ST/N001273/1, ST/M004775/1] Funding Source: researchfish
The fiducial cross section for Y(1S) pair production in proton-proton collisions at a center-of-mass energy of 13TeVin the region where both Y(1S) mesons have an absolute rapidity below 2.0 is measured to be 79 +/- 11 (stat) +/- 6 (syst) +/- 3 (B) pbassuming the mesons are produced unpolarized. The last uncertainty corresponds to the uncertainty in the Y(1S) meson dimuon branching fraction. The measurement is performed in the final state with four muons using proton-proton collision data collected in 2016 by the CMS experiment at the LHC, corresponding to an integrated luminosity of 35.9 fb(-1). This process serves as a standard model reference in a search for narrow resonances decaying to Y(1S)mu(+)mu(-) in the same final state. Such a resonance could indicate the existence of a tetraquark that is a bound state of two bquarks and two (b) over bar antiquarks. The tetraquark search is performed for masses in the vicinity of four times the bottom quark mass, between 17.5 and 19.5 GeV, while a generic search for other resonances is performed for masses between 16.5 and 27 GeV. No significant excess of events compatible with a narrow resonance is observed in the data. Limits on the production cross section times branching fraction to four muons via an intermediate Y(1S) resonance are set as a function of the resonance mass. (C) 2020 The Author(s). Published by Elsevier B.V.
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