Journal
JOURNAL OF HIGH ENERGY PHYSICS
Volume -, Issue 1, Pages 1-24Publisher
SPRINGER
DOI: 10.1007/JHEP01(2015)024
Keywords
Spectroscopy; Hadron-Hadron Scattering; QCD; Branching fraction; B physics
Categories
Funding
- CERN
- CAPES (Brazil)
- CNPq (Brazil)
- FAPERJ (Brazil)
- FINEP (Brazil)
- NSFC (China)
- CNRS/IN2P3 (France)
- BMBF (Germany)
- DFG (Germany)
- HGF (Germany)
- MPG (Germany)
- SFI (Ireland)
- INFN (Italy)
- FOM (The Netherlands)
- NWO (The Netherlands)
- MNiSW (Poland)
- NCN (Poland)
- MEN/IFA (Romania)
- MinES (Russia)
- FANO (Russia)
- MinECo (Spain)
- SNSF (Switzerland)
- SER (Switzerland)
- NASU (Ukraine)
- STFC (United Kingdom)
- NSF (U.S.A.)
- IN2P3 (France)
- KIT (Germany)
- SURF (The Netherlands)
- PIC (Spain)
- GridPP (United Kingdom)
- STFC [ST/L003392/1, LHCb, ST/K001604/1, ST/H00100X/2, ST/K00137X/1, ST/K003410/1, ST/J004332/1, ST/N000447/1, LHCb Upgrades, ST/L003112/1, ST/K001302/1, ST/J50094X/1, ST/K00140X/1, ST/L003538/1, ST/M001407/1, ST/K000705/1, ST/M000729/1, ST/H006737/1, ST/L001195/1, PP/E000355/1, ST/L003163/1, ST/H00100X/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/K00140X/1, ST/J50094X/1, ST/K001604/1, ST/K001418/1, ST/K00137X/1, ST/K001310/1 ATLAS, 1416165, ST/N000250/1, ST/K001310/1 LHCb, ST/L003538/1, ST/M001474/1, ST/L003112/1, 1225314, ST/K001302/1, 1415632, 1299204, ST/K001256/1, 1096173, ST/L003163/1, ST/M000729/1, ST/N000447/1, 1511824, ST/H00100X/1, PP/E000355/1, 1564711, LHCb, 1208164, ST/K001310/1 ATLAS Upgrades, ST/L003392/1, GRIDPP, ST/J004332/1, ST/K001310/1, 1225304, ST/H00100X/2, ST/K003410/1, 1364044, 1369397, ST/K001310/1 LHCb Upgrades, ST/H006737/1, ST/L003163/1 LHCb Upgrades, ST/K000705/1, ST/L001195/1, ST/M001407/1, LHCb Upgrades] Funding Source: researchfish
- Division Of Physics
- Direct For Mathematical & Physical Scien [1205805, 1505719] Funding Source: National Science Foundation
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A study of B and B-s(0) meson decays into J/psi eta and J/psi eta' final states is performed using a data set of proton-proton collisions at centre-of-mass energies of 7 and 8 TeV, collected by the LCHb experiment and corresponding to 3.0 fb(-1) of integrated luminosity. The decay B-0 -> J/psi eta' is observed for the first time. The following ratios of branching fractions are measured: B(B-0 -> J psi eta')/B(B-s(0) -> J psi eta') = (2.28 +/- 0.65 (stat) +/- 0.010 (syst) +/- 0.13 (f(s)/f(d)) x 10(-2) , B(B-0 -> J psi eta')/B(B-s(0) -> J psi eta') = (1.85 +/- 0.65 (stat) +/- 0.09 (syst) +/- 0.11 (f(s)/f(d)) x 10(-2) where the third uncertainty is related to the present knowledge of f(s)/f(d), the ratio between the probabilities for a b quark to form a B-s(0) or a B-0 meson. The branching fraction ratios are used to determine the parameters of eta-eta' meson mixing. In addition, the first evidence for the decay B-s(0) -> psi(2S)' is reported, and the relative branching fraction is measured, B(B-s(0) -> psi(2S)eta')/B(B-s(0) -> J psi eta') = (38.7 +/- 9.0 (stat) +/- 1.3 (syst) +/- 0.9(B)) x 10(-2), where the third uncertainty is due to the limited knowledge of the branching fractions of J/psi and psi(2S) mesons.
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