TY - JOUR
T1 - Evidence for the decays B0→D¯(∗)0ϕ and updated measurements of the branching fractions of the B0s→D¯(∗)0ϕ decays
AU - LHCb Collaboration
AU - Watson, Nigel
AU - Slater, Mark
AU - Bifani, Simone
AU - Bosley, Robbie
AU - Plews, Jonathan
AU - Sahoo, Niladribihari
AU - Swallow, Paul
AU - Cooke, Naomi
N1 - We express our gratitude to our colleagues in the CERN accelerator departments for the excellent performance of the LHC. We thank the technical and administrative staff at the LHCb institutes. We acknowledge support from CERN and from the national agencies: CAPES, CNPq, FAPERJ and FINEP (Brazil); MOST and NSFC (China); CNRS/IN2P3 (France); BMBF, DFG and MPG (Germany); INFN (Italy); NWO (Netherlands); MNiSW and NCN (Poland); MEN/IFA (Romania); MICINN (Spain); SNSF and SER (Switzerland); NASU (Ukraine); STFC (United Kingdom); DOE NP and NSF (USA). We acknowledge the computing resources that are provided by CERN, IN2P3 (France), KIT and DESY (Germany), INFN (Italy), SURF (Netherlands), PIC (Spain), GridPP (United Kingdom), CSCS (Switzerland), IFIN-HH (Romania), CBPF (Brazil), Polish WLCG (Poland) and NERSC (USA). We are indebted to the communities behind the multiple open-source software packages on which we depend. Individual groups or members have received support from ARC and ARDC (Australia); Minciencias (Colombia); AvH Foundation (Germany); EPLANET, Marie Skłodowska-Curie Actions, ERC and NextGenerationEU (European Union); A*MIDEX, ANR, IPhU and Labex P2IO, and Région Auvergne-Rhône-Alpes (France); Key Research Program of Frontier Sciences of CAS, CAS PIFI, CAS CCEPP, Fundamental Research Funds for the Central Universities, and Sci. & Tech. Program of Guangzhou (China); GVA, XuntaGal, GENCAT, Inditex, InTalent and Prog. Atracción Talento, CM (Spain); SRC (Sweden); the Leverhulme Trust, the Royal Society and UKRI (United Kingdom).
PY - 2023/10/20
Y1 - 2023/10/20
N2 - Evidence for the decays B0→D¯0ϕ and B0→D¯∗0ϕ is reported with a significance of 3.6σ and 4.3σ, respectively. The analysis employs pp collision data at centre-of-mass energies s√=7, 8 and 13 TeV collected by the LHCb detector and corresponding to an integrated luminosity of 9 fb−1. The branching fractions are measured to be B(B0→D¯0ϕ)=(7.7±2.1±0.7±0.7)×10−7, B(B0→D¯∗0ϕ)=(2.2±0.5±0.2±0.2)×10−6. In these results, the first uncertainties are statistical, the second systematic, and the third is related to the branching fraction of the B0→D¯0K+K− decay, used for normalisation. By combining the branching fractions of the decays B0→D¯(∗)0ϕ and B0→D¯(∗)0ω, the ω-ϕ mixing angle δ is constrained to be tan2δ=(3.6±0.7±0.4)×10−3, where the first uncertainty is statistical and the second systematic. An updated measurement of the branching fractions of the B0s→D¯(∗)0ϕ decays, which can be used to determine the CKM angle γ, leads to B(B0s→D¯0ϕ)=(2.30±0.10±0.11±0.20)×10−5, B(B0s→D¯∗0ϕ)=(3.17±0.16±0.17±0.27)×10−5.
AB - Evidence for the decays B0→D¯0ϕ and B0→D¯∗0ϕ is reported with a significance of 3.6σ and 4.3σ, respectively. The analysis employs pp collision data at centre-of-mass energies s√=7, 8 and 13 TeV collected by the LHCb detector and corresponding to an integrated luminosity of 9 fb−1. The branching fractions are measured to be B(B0→D¯0ϕ)=(7.7±2.1±0.7±0.7)×10−7, B(B0→D¯∗0ϕ)=(2.2±0.5±0.2±0.2)×10−6. In these results, the first uncertainties are statistical, the second systematic, and the third is related to the branching fraction of the B0→D¯0K+K− decay, used for normalisation. By combining the branching fractions of the decays B0→D¯(∗)0ϕ and B0→D¯(∗)0ω, the ω-ϕ mixing angle δ is constrained to be tan2δ=(3.6±0.7±0.4)×10−3, where the first uncertainty is statistical and the second systematic. An updated measurement of the branching fractions of the B0s→D¯(∗)0ϕ decays, which can be used to determine the CKM angle γ, leads to B(B0s→D¯0ϕ)=(2.30±0.10±0.11±0.20)×10−5, B(B0s→D¯∗0ϕ)=(3.17±0.16±0.17±0.27)×10−5.
U2 - 10.1007/JHEP10(2023)123
DO - 10.1007/JHEP10(2023)123
M3 - Article
SN - 1126-6708
VL - 2023
JO - JHEP
JF - JHEP
M1 - 123
ER -