Journal
PHYSICAL REVIEW LETTERS
Volume 115, Issue 24, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.115.241801
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- CERN (Brazil)
- CAPES (Brazil)
- FAPERJ (Brazil)
- FINEP (Brazil)
- NSFC (China)
- CNRS/IN2P3 (France)
- BMBF (Germany)
- DFG (Germany)
- MPG (Germany)
- INFN (Italy)
- FOM (Netherlands)
- NWO (Netherlands)
- MNiSW (Poland)
- NCN (Poland)
- MEN/IFA (Romania)
- MinES (Russia)
- FANO (Russia)
- MinECo (Spain)
- SNSF (Switzerland)
- SER (Switzerland)
- NASU (Ukraine)
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- NSF (USA)
- AvH Foundation (Germany)
- EPLANET (European Union)
- Marie Sklodowska-Curie Actions (European Union)
- ERC (European Union)
- Region Auvergne (France)
- Conseil General de Haute-Savoie (France)
- Labex ENIGMASS (France)
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- RFBR (Russia)
- GVA (Spain)
- XuntaGal (Spain)
- GENCAT (Spain)
- Royal Society (United Kingdom)
- Royal Commission for the Exhibition of 1851 (United Kingdom)
- STFC [ST/L003392/1, PP/E000355/1, ST/M004058/1, ST/I000097/1, ST/M000761/1, ST/L006146/1, ST/K003410/1, ST/L00352X/1, ST/K004646/1, ST/K00137X/1, ST/K001604/1, ST/H00100X/2, ST/H00100X/1, ST/K003534/1, ST/K001302/1, PP/E003095/1, ST/J005495/1, ST/J50094X/1, ST/K00140X/1, ST/L003538/1, ST/M001407/1, ST/K000705/1, ST/M000729/1, ST/H006737/1, ST/M004791/1, ST/L001195/1, ST/J004332/1, ST/N000447/1, ST/I003576/1, LHCb, ST/L003163/1, LHCb Upgrades, ST/L003112/1, ST/J004855/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/M004058/1, ST/K00137X/1, ST/K001418/1, ST/J005495/1, ST/K001604/1, ST/J50094X/1, ST/K00140X/1, 1364044, ST/K003410/1, ST/K001310/1 ATLAS, 1514623, ST/K000705/1, ST/L006146/1, 1415632, 1299204, ST/K001256/1, ST/M000761/1, ST/L001195/1, ST/M001407/1, LHCb Upgrades, 1511824, ST/N000447/1, ST/M000729/1, ST/L003163/1, 1096173, ST/M001474/1, ST/L003538/1, ST/M004791/1 GRIDPP, ST/N000250/1, 1416165, ST/L00352X/1, ST/L003112/1, 1565032, ST/J004855/1, 1565116, ST/L003163/1 LHCb Upgrades, ST/H006737/1, ST/K001310/1 LHCb Upgrades, 1369397, ST/K001302/1, ST/K003534/1 GRIDPP, ST/K001310/1 ATLAS Upgrades, ST/L003392/1, GRIDPP, ST/J004332/1, ST/I000097/1, ST/H00100X/2, ST/K003534/1, ST/K001310/1, ST/K001310/1 LHCb, ST/M004791/1, ST/I003576/1, ST/H00100X/1, PP/E000355/1, 1564711, PP/E003095/1, ST/K004646/1, LHCb, 1208164] Funding Source: researchfish
- Direct For Mathematical & Physical Scien
- Division Of Physics [1205805, 1505719] Funding Source: National Science Foundation
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Using a pp collision data sample corresponding to an integrated luminosity of 3.0 fb(-1), collected by the LHCb detector, we present the first search for the strangeness-changing weak decay Xi(-)(b) -> Delta(0)(b)pi(-). No b hadron decay of this type has been seen before. A signal for this decay, corresponding to a significance of 3.2 standard deviations, is reported. The relative rate is measured to be f Xi(-)(b)/f Lambda B-0(b)(Xi(-)(b) -> Lambda(0)(b)pi(-)) = (5.7 +/- 1.8(-0.9)(+0.8)) x 10(-4) where f Xi(-)(b) and f Lambda(0)(b) are the b -> Xi(-)(b) and b -> Lambda(0)(b) fragmentation fractions, and B(Xi(-)(b) -> Lambda(0)(b)pi(-)) is the branching fraction. Assuming f Xi(-)(b)/f Lambda(0)(b) is bounded between 0.1 and 0.3, the branching fraction B(Xi(-)(b) -> Lambda(0)(b)pi(-)) would lie in the range from (0.57 +/- 0.21)% to (0.19 +/- 0.07)%.
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