期刊
JOURNAL OF HIGH ENERGY PHYSICS
卷 -, 期 7, 页码 -出版社
SPRINGER
DOI: 10.1007/JHEP07(2012)133
关键词
Hadron-Hadron Scattering
资金
- CAPES (Brazil)
- CNPq (Brazil)
- FAPERJ (Brazil)
- FINEP (Brazil)
- CERN (China)
- 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 under FP7
- Region Auvergne
- Science and Technology Facilities Council [ST/K000705/1, ST/J004820/1, ST/H006737/1, ST/K001310/1 LHCb Upgrades, ST/J005614/1, ST/H00100X/2, ST/L001144/1, ST/K001310/1, GRIDPP, ST/H00100X/1, PP/E000355/1, ST/G502412/1, ST/K001361/1 LHCb, ST/K001310/1 LHCb, ST/K00140X/1, ST/H001085/2, ST/F007094/1, ST/F008015/1, ST/K001418/1, ST/H001093/2, ST/I002839/1, ST/M001431/1, ST/K000616/1, ST/H001026/1, ST/H001069/2, ST/K001361/1 MINOS/MINOS+, ST/K001310/1 ATLAS, ST/H001026/2, ST/G005974/1, ST/I505572/1, ST/M001474/1, 1096173, ST/L001225/1, LHCb Upgrades, ST/L001195/1, ST/K001361/1 ATLAS, PP/E002722/1, ST/K001256/1, ST/K001361/1, ST/K00073X/1, ST/K001310/1 ATLAS Upgrades, ST/K001361/1 ATLAS Upgrades, 1208164, LHCb, PP/E000347/1, ST/K001361/1 LHCb Upgrades, ST/H001093/1] Funding Source: researchfish
- STFC [ST/L001144/1, LHCb Upgrades, ST/K001361/1, PP/E002722/1, ST/G502412/1, ST/F007094/1, ST/I002839/1, ST/H001069/2, ST/K000705/1, ST/J004820/1, ST/K000616/1, ST/H001085/2, ST/H006737/1, ST/H00100X/2, ST/G005974/1, ST/H001026/2, ST/K00073X/1, ST/K004646/1, ST/J005614/1, ST/M001431/1, ST/H001026/1, ST/L001195/1, ST/F008015/1, LHCb, ST/L001225/1, ST/I505572/1, ST/H00100X/1, PP/E000355/1] Funding Source: UKRI
The isospin asymmetries of B -> K-(*)mu(+)mu(-) decays and the partial branching fractions of B-0 -> K-0 mu(+)mu(-) and B+ -> K*+mu(+)mu(-) are measured as a function of the di-muon mass squared q(2) using an integrated luminosity of 1.0 fb(-1) collected with the LHCb detector. The B -> K mu(+)mu(-) isospin asymmetry integrated over q(2) is negative, deviating from zero with over 4 sigma significance. The B -> K*mu(+)mu(-) decay measurements are consistent with the Standard Model prediction of negligible isospin asymmetry. The observation of the decay B0 -> K-s(0)mu(+)mu(-) is reported with 5.7 sigma significance. Assuming that the branching fraction of B-0 -> K-0 mu(+)mu(-) is twice that of B-0 -> K-s(0)mu(+)mu(-), the branching fractions of B-0 -> K-0 mu(+)mu(-) and B -> K*(+)mu(+)mu(-) it are found to be (0.31(-0.06)(+0.07)) x 10(-6) and (1.16 +/- 0.19) x 10(-6), respectively.
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