期刊
EUROPEAN PHYSICAL JOURNAL C
卷 72, 期 5, 页码 -出版社
SPRINGER
DOI: 10.1140/epjc/s10052-012-1972-7
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资金
- CAPES (Brazil)
- CNPq (Brazil)
- FAPERJ (Brazil)
- FINEP (Brazil)
- CERN
- NSFC (China)
- CNRS/IN2P3 (France)
- BMBF (Germany)
- DFG (Germany)
- HGF (Germany)
- MPG (Germany)
- SFI (Ireland)
- INFN (Italy)
- FOM (The Netherlands)
- NWO (The Netherlands)
- SCSR (Poland)
- ANCS (Romania)
- MinES of Russia (Russia)
- Rosatom (Russia)
- MICINN (Spain)
- XuntaGal (Spain)
- GENCAT (Spain)
- SNSF (Switzerland)
- SER (Switzerland)
- NAS Ukraine (Ukraine)
- STFC (United Kingdom)
- NSF (USA)
- ERC
- Region Auvergne
- STFC [PP/E000355/1, ST/L001225/1, ST/F008015/1, ST/L001195/1, ST/H001093/1, ST/H006737/1, ST/H001085/2, ST/K000616/1, ST/J004820/1, ST/K000705/1, ST/K00140X/1, ST/H001069/2, ST/I002839/1, ST/F007094/1, ST/G502412/1, PP/E002722/1, ST/K001361/1, LHCb Upgrades, ST/I505572/1, LHCb, ST/M001431/1, ST/J005614/1, ST/H001093/2, ST/K004646/1, ST/K00073X/1, ST/G005974/1, PP/E000347/1, ST/H00100X/2, ST/L001144/1, ST/H00100X/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/K001310/1 LHCb Upgrades, ST/H006737/1, ST/J004820/1, ST/K000705/1, PP/E000347/1, ST/K001361/1 LHCb Upgrades, ST/H001093/1, ST/K001361/1, ST/K001256/1, PP/E002722/1, ST/K001361/1 ATLAS, ST/L001195/1, LHCb Upgrades, ST/L001225/1, ST/M001474/1, ST/I505572/1, ST/G005974/1, ST/K001310/1 ATLAS, ST/K001361/1 MINOS/MINOS+, ST/H001069/2, ST/K000616/1, ST/M001431/1, ST/I002839/1, ST/H001093/2, ST/K001418/1, ST/F008015/1, ST/F007094/1, ST/H001085/2, ST/K00140X/1, ST/K001310/1 LHCb, ST/K001361/1 LHCb, ST/G502412/1, ST/H00100X/1, PP/E000355/1, LHCb, 1208164, ST/K001361/1 ATLAS Upgrades, ST/K001310/1 ATLAS Upgrades, ST/K00073X/1, GRIDPP, ST/K001310/1, ST/L001144/1, ST/H00100X/2, ST/J005614/1] Funding Source: researchfish
Using 34.7 pb(-1) of data collected with the LHCb detector, the inclusive production of the X(3872) meson in pp collisions at root s = 7 TeV is observed for the first time. Candidates are selected in the X(3872) -> J/psi pi(+)pi(-) decay mode, and used to measure sigma(pp -> X(3872) + anything)beta(X(3872) -> J/psi pi(+)pi(-)) = 5.4 +/- 1.3 (stat)+/- 0.8 (syst) nb, where sigma (pp -> X(3872) + anything) is the inclusive production cross section of X(3872) mesons with rapidity in the range 2.5-4.5 and transverse momentum in the range 5-20 GeV/c. In addition the masses of both the X(3872) and psi(2S) mesons, reconstructed in the J/psi pi(+)pi(-) final state, are measured to be m(X(3872)) = 3871.95 +/- 0.48 (stat)+/- 0.12 (syst) MeV/c(2) and m(psi(2S)) = 3686.12 +/- 0.06 (stat)+/- 0.10 (syst) MeV/c(2).
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