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Observation of Bs0→D¯*0ϕ and search for B0→D¯0ϕ decays
Name
PhysRevD.98.071103.pdf
Description
Published version
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525.69 KB
Format
Adobe PDF
Checksum (MD5)
bcc8bbff5f66f8a2918e6a1db934641f
Date Issued
October 1, 2018
Journal
Physical Review D
Abstract
© 2018 CERN. The first observation of the Bs0→D̄∗0φ decay is reported, with a significance of more than seven standard deviations, from an analysis of pp collision data corresponding to an integrated luminosity of 3 fb-1, collected with the LHCb detector at center-of-mass energies of 7 and 8 TeV. The branching fraction is measured relative to that of the topologically similar decay B0→D̄0π+π- and is found to be B(Bs0→D̄∗0φ)=(3.7±0.5±0.3±0.2)×10-5, where the first uncertainty is statistical, the second systematic, and the third from the branching fraction of the B0→D̄0π+π- decay. The fraction of longitudinal polarization in this decay is measured to be fL=(73±15±4)%. The most precise determination of the branching fraction for the Bs0→D̄0φ decay is also obtained, B(Bs0→D̄0φ)=(3.0±0.3±0.2±0.2)×10-5. An upper limit, B(B0→D̄0φ)<2.0 (2.3)×10-6 at 90% (95%) confidence level is set. A constraint on the ω-φ mixing angle δ is set at |δ|<5.2° (5.5°) at 90% (95%) confidence level.
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Creative Commons Attribution 4.0 International license
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DOI of Published Version
10.1103/PhysRevD.98.071103
