# Measurement of $C\!P$ observables in $B^\pm \rightarrow D K^\pm$ and $B^\pm \rightarrow D \pi^\pm$ with two- and four-body $D$ decays

Abstract : Measurements of $C\!P$ observables in $B^\pm \rightarrow D K^\pm$ and $B^\pm \rightarrow D \pi^\pm$ decays are presented where the $D$ meson is reconstructed in the final states $K^\pm\pi^\mp$, $\pi^\pm K^\mp$, $K^+K^-$, $\pi^+\pi^-$, $K^\pm\pi^\mp \pi^+ \pi^-$, $\pi^\pm K^\mp \pi^+ \pi^-$ and $\pi^+ \pi^- \pi^+ \pi^-$. This analysis uses a sample of charged $B$ mesons from $pp$ collisions collected by the LHCb experiment in 2011 and 2012, corresponding to an integrated luminosity of 3.0 fb$^{-1}$. Various \CP-violating effects are reported and together these measurements provide important input for the determination of the unitarity triangle angle $\gamma$. The analysis of the four-pion $D$ decay mode is the first of its kind.
Type de document :
Article dans une revue
Physics Letters B, Elsevier, 2016, 760, pp.117-131. 〈10.1016/j.physletb.2016.06.022〉

http://hal.in2p3.fr/in2p3-01295442
Contributeur : Danielle Cristofol <>
Soumis le : jeudi 31 mars 2016 - 08:30:58
Dernière modification le : jeudi 18 janvier 2018 - 01:51:10

### Citation

R. Aaij, C. Abellán Beteta, B. Adeva, M. Adinolfi, Z. Ajaltouni, et al.. Measurement of $C\!P$ observables in $B^\pm \rightarrow D K^\pm$ and $B^\pm \rightarrow D \pi^\pm$ with two- and four-body $D$ decays. Physics Letters B, Elsevier, 2016, 760, pp.117-131. 〈10.1016/j.physletb.2016.06.022〉. 〈in2p3-01295442〉

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