期刊
PHYSICAL REVIEW D
卷 87, 期 9, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.87.092007
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资金
- CERN
- CAPES (Brazil)
- CNPq (Brazil)
- FAPERJ (Brazil)
- FINEP (Brazil)
- NSFC (China)
- CNRS/IN2P3 (France)
- Region Auvergne (France)
- BMBF (Germany)
- DFG (Germany)
- HGF (Germany)
- MPG (Germany)
- SFI (Ireland)
- INFN (Italy)
- FOM (The Netherlands)
- NWO (The Netherlands)
- SCSR (Poland)
- ANCS/IFA (Romania)
- MinES (Russia)
- Rosatom (Russia)
- RFBR (Russia)
- NRC Kurchatov Institute (Russia)
- MinECo (Spain)
- XuntaGal (Spain)
- GENCAT (Spain)
- SNSF (Switzerland)
- SER (Switzerland)
- NAS Ukraine (Ukraine)
- STFC (United Kingdom)
- NSF (USA)
- ERC
- IN2P3 (France)
- KIT (Germany)
- SURF (The Netherlands)
- PIC (Spain)
- GridPP (United Kingdom)
- Division Of Physics
- Direct For Mathematical & Physical Scien [1040231] Funding Source: National Science Foundation
- Science and Technology Facilities Council [ST/K001361/1 LHCb Upgrades, ST/L003112/1, 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/K003410/1, ST/J005568/1, ST/K001604/1 DMUK, ST/K001310/1 LHCb Upgrades, ST/H006737/1, ST/K000705/1, PP/E000347/1] Funding Source: researchfish
- STFC [ST/L003392/1, PP/E000355/1, ST/F008015/1, ST/H001085/1, ST/L001195/1, ST/H001093/1, ST/H006737/1, ST/H001085/2, ST/K000705/1, ST/K00140X/1, ST/L00352X/1, ST/J005568/1, ST/M000761/1, ST/H001069/2, ST/F007094/1, ST/K001361/1, ST/L003112/1, LHCb Upgrades, ST/I505572/1, LHCb, 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/2, ST/L001144/1, ST/H00100X/1] Funding Source: UKRI
First observations and measurements of the branching fractions of the (B) over bar (0)(s) -> D+D-, (B) over bar (0)(s) -> Ds+D- and (B) over bar (0)(s) -> D-0(D) over bar (0) decays are presented using 1.0 fb(-1) of data collected by the LHCb experiment. These branching fractions are normalized to those of (B) over bar (0) -> D+D-, B-0 -> D-Ds+ and B- -> (DDs-)-D-0, respectively. An excess of events consistent with the decay (B) over bar (0) -> D-0(D) over bar (0) is also seen, and its branching fraction is measured relative to that of B- -> D0Ds-. Improved measurements of the branching fractions B((B) over bar (0)(s) -> Ds+Ds-) and B(B- -> (DDs-)-D-0) are reported, each relative to B(B-0 -> D-Ds+). The ratios of branching fractions are B((B) over bar (0)(s) -> D+D-)/B((B) over bar (0) -> D+D-) = 1.08 +/- 0.20 +/- 0.10, B((B) over bar (0)(s) -> Ds+D-)/B(B-0 -> D-Ds+) = 0.050 +/- 0.008 +/- 0.004, B((B) over bar (0)(s) -> D-0(D) over bar (0))/B((B) over bar (-) -> (DDs-)-D-0) = 0.019 +/- 0.003 +/- 0.003, B((B) over bar (0) -> D-0(D) over bar (0))/B(B- -> (DDs-)-D-0) < 0.0024 at 90% CL, B(<(B)over bar>(0)(s) -> D-s(+)(D) over bar (-)(s))/B(B-0 -> D-Ds+) = 0.56 +/- 0.03 +/- 0.04, B(B -> (DDs)-D-0)/B(B-0 -> D-Ds+) = 1.22 +/- 0.02 +/- 0.07, where the uncertainties are statistical and systematic, respectively.
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