期刊
PHYSICAL REVIEW D
卷 87, 期 11, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.87.112012
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资金
- CERN
- CAPES
- CNPq
- FAPERJ
- FINEP (Brazil)
- NSFC (China)
- CNRS/IN2P3
- Region Auvergne (France)
- BMBF
- DFG
- HGF
- MPG (Germany)
- SFI (Ireland)
- INFN (Italy)
- FOM
- NWO (Netherlands)
- SCSR (Poland)
- ANCS/IFA (Romania)
- MinES
- Rosatom
- RFBR
- NRC Kurchatov Institute (Russia)
- MinECo
- XuntaGal
- GENCAT (Spain)
- SNSF
- SER (Switzerland)
- NAS Ukraine (Ukraine)
- STFC (United Kingdom)
- NSF (USA)
- ERC under FP7
- IN2P3 (France)
- KIT
- BMBF (Germany)
- SURF (Netherlands)
- PIC (Spain)
- GridPP (United Kingdom)
- Science and Technology Facilities Council [ST/L00352X/1, ST/H001093/1, ST/K001361/1, ST/K001604/1 CMS Upgrade, ST/K001256/1, ST/M000761/1, ST/K001604/1 SuperNEMO, ST/K001361/1 ATLAS, ST/H00081X/2, ST/K001604/1 LHCb, ST/L001195/1, LHCb Upgrades, ST/H00081X/1, 1096173, ST/M001474/1, ST/I505572/1, ST/G005974/1, ST/H001085/1, ST/K001310/1 ATLAS, ST/K001361/1 MINOS/MINOS+, ST/H001069/2, ST/M001431/1, ST/K003593/1 GRIDPP, ST/K00137X/1, ST/K001604/1 T2K, ST/H001093/2, ST/K001418/1, ST/F008015/1, ST/K001604/1, ST/F007094/1, ST/H001085/2, ST/K00140X/1, ST/K001310/1 LHCb, ST/K001361/1 LHCb, ST/H00100X/1, PP/E000355/1, ST/K004646/1, LHCb, 1208164, ST/K001361/1 ATLAS Upgrades, ST/K00140X/1 LHCb, ST/K001310/1 ATLAS Upgrades, ST/L003392/1, ST/K00073X/1, GRIDPP, ST/K000748/1, ST/J004332/1, ST/K001310/1, ST/K001604/1 MICE/UKNF, ST/L001144/1, ST/H00100X/2, ST/K001604/1 GRIDPP, ST/K001604/1 LHCb Upgrades, ST/K000705/1, ST/H006737/1, ST/K003410/1, ST/J005568/1, ST/K001604/1 DMUK, ST/K001310/1 LHCb Upgrades, PP/E000347/1, ST/K001361/1 LHCb Upgrades, ST/L003112/1] Funding Source: researchfish
- STFC [ST/J004332/1, ST/K000748/1, ST/M001431/1, ST/H001093/2, ST/K003410/1, ST/H00081X/1, ST/K004646/1, ST/K00073X/1, ST/K00137X/1, ST/G005974/1, ST/K001604/1, ST/H00081X/2, PP/E000347/1, ST/H00100X/1, LHCb, ST/L003392/1, ST/L003112/1, ST/K001361/1, ST/H00100X/2, ST/L001144/1, PP/E000355/1, LHCb Upgrades, ST/I505572/1, ST/F007094/1, ST/H001069/2, ST/M000761/1, ST/J005568/1, ST/L00352X/1, ST/K00140X/1, ST/K000705/1, ST/H001085/2, ST/H006737/1, ST/H001093/1, ST/L001195/1, ST/H001085/1, ST/F008015/1] Funding Source: UKRI
The decays B-c(+) -> J/ psi D-s(+) and B-c(+) -> J/ psi D-s*(+) are observed for the first time using a dataset, corresponding to an integrated luminosity of 3 fb(-1), collected by the LHCb experiment in proton-proton collisions at center-of-mass energies of root s = 7 and 8 TeV. The statistical significance for both signals is in excess of 9 standard deviations. The following ratios of branching fractions are measured to be 'B(B-c(+) -> J/ psi D-s(+))/B(B-c(+) -> J/ psi pi(+)) = 2.90 +/- 0.57 +/- 0.24, B(B-c(+) -> J/psi D-s*(+))/B(B-c(+) -> J/ psi D-s(+)) = 2.37 +/- 0.56 +/- 0.10, where the first uncertainties are statistical and the second systematic. The mass of the B-c(+) meson is measured to be m(Bc+) = 6276.28 +/- 1.44(stat) +/- 0.36(syst) MeV/c(2), using the B-c(+) -> J/ psi D-s(+) decay mode.
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