Measurements of CP observables in B± → D⁽*⁾K± and B± → D⁽*⁾ π± decays are presented, where D⁽*⁾ indicates a neutral D or D* meson that is an admixture of D⁽*⁾⁰ and D̅⁽*⁾⁰ states. Decays of the D* meson to the Dπ⁰ and Dγ final states are partially reconstructed without inclusion of the neutral pion or photon, resulting in distinctive shapes in the B candidate invariant mass distribution. Decays of the D meson are fully reconstructed in the K± π∓ , K⁺ K⁻ and π⁺ π⁻ final states. The analysis uses a sample of charged B mesons produced in pp collisions collected by the LHCb experiment, corresponding to an integrated luminosity of 2.0, 1.0 and 2.0 fb⁻¹ taken at centre-of-mass energies of √s=7, 8 and 13 TeV, respectively. The study of B± → D* K± and B± → D* π± decays using a partial reconstruction method is the first of its kind, while the measurement of B± → D K± and B± → D π± decays is an update of previous LHCb measurements. The B± → D K± results are the most precise to date.

Measurement of CP observables in B± → D⁽*⁾K± and B± → D⁽*⁾ π± decays

Graverini, E.;Punzi, G.;
2018-01-01

Abstract

Measurements of CP observables in B± → D⁽*⁾K± and B± → D⁽*⁾ π± decays are presented, where D⁽*⁾ indicates a neutral D or D* meson that is an admixture of D⁽*⁾⁰ and D̅⁽*⁾⁰ states. Decays of the D* meson to the Dπ⁰ and Dγ final states are partially reconstructed without inclusion of the neutral pion or photon, resulting in distinctive shapes in the B candidate invariant mass distribution. Decays of the D meson are fully reconstructed in the K± π∓ , K⁺ K⁻ and π⁺ π⁻ final states. The analysis uses a sample of charged B mesons produced in pp collisions collected by the LHCb experiment, corresponding to an integrated luminosity of 2.0, 1.0 and 2.0 fb⁻¹ taken at centre-of-mass energies of √s=7, 8 and 13 TeV, respectively. The study of B± → D* K± and B± → D* π± decays using a partial reconstruction method is the first of its kind, while the measurement of B± → D K± and B± → D π± decays is an update of previous LHCb measurements. The B± → D K± results are the most precise to date.
2018
Aaij, R.; Adeva, B.; Adinolfi, M.; Ajaltouni, Z.; Akar, S.; Albrecht, J.; Alessio, F.; Alexander, M.; Alfonso Albero, A.; Ali, S.; Alkhazov, G.; Alvar...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/904791
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