Observation of CP violation in B+ to DK+ decays
LHCb collaboration: R. Aaij, C. Abellan Beteta, B. Adeva, M. Adinolfi,, C. Adrover, A. Affolder, Z. Ajaltouni, J. Albrecht, F. Alessio, M. Alexander,, S. Ali, G. Alkhazov, P. Alvarez Cartelle, A.A. Alves Jr, S. Amato, Y. Amhis,, J. Anderson, R.B. Appleby, O. Aquines Gutierrez
TL;DR
This paper reports the first observation of CP violation in B+ to DK+ decays, using LHCb data to analyze various D meson decay modes and measure related observables with high significance.
Contribution
It presents the first observation of CP violation in B+ to DK+ decays and provides measurements of several decay observables using LHCb data.
Findings
CP violation in B+ to DK+ observed with 5.8 sigma significance
First measurement of D to pi+K- decay mode in this context
Multiple decay modes analyzed for CP violation signals
Abstract
An analysis of B+ to DK+ and B+ to Dpi+ decays is presented where the D meson is reconstructed in the two-body final states: K+pi-, K+K-, pi+pi- and pi+K-. Using 1.0 fb-1 of LHCb data, measurements of several observables are made including the first observation of the suppressed mode B+ to DK+, D to pi+K-. CP violation in B+ to DK+ decays is observed with 5.8 sigma significance.
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