期刊
NUCLEAR PHYSICS B
卷 886, 期 -, 页码 665-680出版社
ELSEVIER
DOI: 10.1016/j.nuclphysb.2014.06.011
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资金
- CERN
- CAPES
- CNPq
- FAPERJ
- FINEP (Brazil)
- NSFC (China)
- CNRS/IN2P3
- Region Auvergne (France)
- BMBF (Germany)
- DFG (Germany)
- HGF (Germany)
- MPG (Germany)
- SFI (Ireland)
- LNFN (Italy)
- FOM (The Netherlands)
- NWO (The Netherlands)
- SCSR (Poland)
- MEN/WA (Romania)
- MinES (Russia)
- Rosatom (Russia)
- RFBR (Russia)
- NRC Kurchatov Institute (Russia)
- MinECo (Spain)
- XuntaGal (Spain)
- GENCAT (Spain)
- SNSF (Switzerland)
- SER (Switzerland)
- NASU (Ukraine)
- STFC (United Kingdom)
- Royal Society (United Kingdom)
- NSF (USA)
- EPLANET
- Marie Curie Actions
- ERC under FP7
- IN2P3 (France)
- KIT (Germany)
- INFN (Italy)
- SURF (The Netherlands)
- PIC (Spain)
- GridPP (United Kingdom)
- STFC [ST/L001144/1, ST/L003392/1, ST/J004855/1, ST/I003576/1, ST/H001093/1, ST/H001026/1, ST/H006737/1, ST/L003538/1, ST/K00140X/1, ST/J005495/1, PP/E003095/1, ST/K001302/1, ST/K003534/1, ST/L00352X/1, ST/L006146/1, ST/M000761/1, ST/H001069/2, ST/F007094/1, ST/I000097/1, ST/K001361/1, ST/L006340/1, LHCb Upgrades, ST/I505572/1, LHCb, ST/J004332/1, ST/K502236/1, ST/M001431/1, ST/H001093/2, ST/K003410/1, ST/K00073X/1, ST/K00137X/1, ST/H001026/2, ST/G005974/1, ST/K001604/1, PP/E000347/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/L003392/1, ST/K00073X/1, GRIDPP, ST/K00140X/1 LHCb, ST/K001361/1 ATLAS Upgrades, ST/K003534/1 GRIDPP, 1208164, LHCb, PP/E003095/1, ST/I003576/1, ST/K001361/1 LHCb, ST/K00140X/1, ST/F007094/1, ST/K001604/1, ST/J005495/1, ST/K001418/1, ST/H001093/2, ST/K001604/1 T2K, ST/L006340/1, ST/K00137X/1, ST/K003593/1 GRIDPP, ST/M001431/1, ST/H001026/1, ST/H001069/2, ST/K001361/1 MINOS/MINOS+, 1416165, ST/H001026/2, ST/G005974/1, ST/L003538/1, ST/I505572/1, ST/M001474/1, 1096173, LHCb Upgrades, ST/K001604/1 LHCb, ST/K001361/1 ATLAS, ST/L006146/1, ST/K502236/1, ST/H006737/1, ST/K001604/1 DMUK, ST/K003410/1, ST/I000097/1, ST/K001604/1 LHCb Upgrades, ST/K001604/1 GRIDPP, ST/L001144/1, 1225304, ST/K003534/1, ST/K001604/1 MICE/UKNF, ST/J004332/1, ST/J004855/1, PP/E000347/1, ST/K001361/1 LHCb Upgrades, ST/L00352X/1, ST/H001093/1, 1225314, ST/K001361/1, ST/K001302/1, ST/K001604/1 CMS Upgrade, 1299204, ST/K001256/1, ST/M000761/1, ST/K001604/1 SuperNEMO] Funding Source: researchfish
- Division Of Physics
- Direct For Mathematical & Physical Scien [1205805] Funding Source: National Science Foundation
Evidence for the decay mode X(3872) -> psi(2S)gamma in B+ -> X(3872)K+ decays is found with a significance of 4.4 standard deviations. The analysis is based on a data sample of proton proton collisions, corresponding to an integrated luminosity of 3 fb(-1), collected with the LHCb detector, at centre-of-mass energies of 7 and 8 TeV. The ratio of the branching fraction of the X(3872) -> psi(2S)gamma decay to that of the X(3872) -> J/psi gamma decay is measured to be B(X(3872) -> psi(2S)gamma)/B(X(3872) -> J/psi gamma) = 2.46 +/- 0.64 +/- 0.29, where the first uncertainty is statistical and the second is systematic. The measured value does not support a pure D (D) over bar* molecular interpretation of the X(3872) state. (C) 2014 CERN for the benefit of the LHCb Collaboration. Published by Elsevier B.V.
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