期刊
NUCLEAR PHYSICS B
卷 867, 期 1, 页码 1-18出版社
ELSEVIER
DOI: 10.1016/j.nuclphysb.2012.09.013
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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 [ST/H006737/1, ST/L001195/1, ST/H001085/1, ST/F008015/1, PP/E000355/1, ST/L003392/1, ST/H00100X/1, ST/L001144/1, ST/H00100X/2, PP/E000347/1, ST/H00081X/2, ST/K001604/1, ST/G005974/1, ST/K00137X/1, ST/K00073X/1, ST/K004646/1, ST/H00081X/1, ST/H001093/2, ST/M001431/1, ST/K000748/1, LHCb, ST/I505572/1, LHCb Upgrades, ST/L003112/1, ST/K001361/1, ST/F007094/1, ST/H001069/2, ST/J005568/1, ST/K00140X/1, ST/K000705/1, ST/H001085/2, ST/H001093/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/K001361/1 LHCb Upgrades, PP/E000347/1, ST/K000705/1, ST/H006737/1, ST/K001310/1 LHCb Upgrades, ST/K001604/1 DMUK, ST/J005568/1, ST/K001604/1 LHCb Upgrades, ST/K001604/1 GRIDPP, ST/H00100X/2, ST/L001144/1, ST/K001604/1 MICE/UKNF, ST/K001310/1, ST/K000748/1, GRIDPP, ST/K00073X/1, ST/L003392/1, ST/K001310/1 ATLAS Upgrades, ST/K00140X/1 LHCb, ST/K001361/1 ATLAS Upgrades, 1208164, LHCb, ST/K004646/1, PP/E000355/1, ST/H00100X/1, ST/K001361/1 LHCb, ST/K001310/1 LHCb, ST/K00140X/1, ST/H001085/2, ST/F007094/1, ST/K001604/1, ST/F008015/1, ST/K001418/1, ST/H001093/2, ST/L003112/1, ST/H001093/1, ST/K001361/1, ST/K001604/1 CMS Upgrade, ST/K001256/1, 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] Funding Source: researchfish
The ratio of branching fractions of the radiative B decays B-0 -> K-*0 gamma and B-s(0) -> phi gamma has been measured using an integrated luminosity of 1.0 fb(-1) of pp collision data collected by the LHCb experiment at a centre-of-mass energy of root s = 7 TeV. The value obtained is B(B-0 -> K-*0 gamma)/B(B-s(0) -> phi gamma) = 1.23 +/- 0.06 (stat.) +/- 0.04 (syst.) +/- 0.10 (f(s)/f(d)), where the first uncertainty is statistical, the second is the experimental systematic uncertainty and the third is associated with the ratio of fragmentation fractions f(s)/f(d). Using the world average value for B(B-0 -> K-*0 gamma), the branching fraction B(B-s(0) -> phi gamma) is measured to be (3.5 +/- 0.4) x 10(-5). The direct CP asymmetry in B-0 -> K-*0 gamma decays has also been measured with the same data and found to be A(CP)(B-0 -> K-*0 gamma) = (0.8 +/- 1.7 (stat.) +/- 0.9 (syst.))%. Both measurements are the most precise to date and are in agreement with the previous experimental results and theoretical expectations. (C) 2012 CERN. Published by Elsevier B.V. All rights reserved.
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