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

Research output: Contribution to journalArticle

  • The LHCb Collaboration
Original languageEnglish
Pages (from-to)16-30
Number of pages15
JournalPhysics Letters B
Volume777
Early online date5 Dec 2017
DOIs
DateAccepted/In press - 27 Nov 2017
DateE-pub ahead of print - 5 Dec 2017
DatePublished (current) - 10 Feb 2018

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 D¯(⁎)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±→DK± and B±→Dπ± decays using a partial reconstruction method is the first of its kind, while the measurement of B±→DK± and B±→Dπ± decays is an update of previous LHCb measurements. The B±→DK± results are the most precise to date.

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    Rights statement: This is the final published version of the article (version of record). It first appeared online via Springer at https://doi.org/10.1016/j.physletb.2017.11.070 . Please refer to any applicable terms of use of the publisher.

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