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.

Aaij, R., Adeva, B., Adinolfi, M., Aidala, C., Ajaltouni, Z., Akar, S., et al. (2018). Observation of Bs0 → D̄∗0φ and search for B0 → D̄0φ decays. PHYSICAL REVIEW D, 98(7) [10.1103/PhysRevD.98.071103].

Observation of Bs0 → D̄∗0φ and search for B0 → D̄0φ decays

Belloli, N.;Borsato, M.;Calvi, M.;Carniti, P.;Cassina, L.;Fazzini, D.;Gotti, C.;Martinelli, M.;Matteuzzi, C.;Petruzzo, M.;
2018

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.
Articolo in rivista - Articolo scientifico
Physics and Astronomy (miscellaneous)
English
2018
98
7
071103
none
Aaij, R., Adeva, B., Adinolfi, M., Aidala, C., Ajaltouni, Z., Akar, S., et al. (2018). Observation of Bs0 → D̄∗0φ and search for B0 → D̄0φ decays. PHYSICAL REVIEW D, 98(7) [10.1103/PhysRevD.98.071103].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/215337
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