Observation of <i>B</i><sub>s</sub><SUP>0</SUP> → (<i>D</i>)over-bar*<SUP>0</SUP>φ and search for <i>B</i><SUP>0</SUP> → (<i>D</i>)over-bar<SUP>0</SUP>φ decays



Aaij, R, Adeva, B, Adinolfi, M, Aidala, CA, Ajaltouni, Z, Akar, S, Albicocco, P, Albrecht, J, Alessio, F, Alexander, M
et al (show 801 more authors) (2018) Observation of <i>B</i><sub>s</sub><SUP>0</SUP> → (<i>D</i>)over-bar*<SUP>0</SUP>φ and search for <i>B</i><SUP>0</SUP> → (<i>D</i>)over-bar<SUP>0</SUP>φ decays. PHYSICAL REVIEW D, 98 (7).

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Abstract

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.

Item Type: Article
Depositing User: Symplectic Admin
Date Deposited: 03 Dec 2018 09:53
Last Modified: 05 Oct 2023 12:15
DOI: 10.1103/PhysRevD.98.071103
Open Access URL: http://doi.org/10.1103/PhysRevD.98.071103
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3029315