Measurement of the CP-Violating Phase ϕ[subscript s] in [bar over B][superscript 0][subscript s] → D[superscript +][subscript s] D[superscript −][subscript s]

• Main Authors: Counts, Ian Thomas Hunt (Contributor), Ilten, Philip J (Contributor), Williams, Michael (Contributor)
• Other Authors: Massachusetts Institute of Technology. Department of Physics (Contributor)
• Format: Article
• Language: English
• Published: American Physical Society (APS), 2018-06-27T19:13:11Z.
• Subjects: Article
• Online Access: Get fulltext

We present a measurement of the CP-violating weak mixing phase φs using the decay [bar over B][superscript 0][subscript s] → D[superscript +][subscript s]D[superscript -][subscript s] in a data sample corresponding to 3.0fb[superscript -1] of integrated luminosity collected with the LHCb detector in pp collisions at center-of-mass energies of 7 and 8 TeV. An analysis of the time evolution of the system, which does not use the constraint |λ|=1 to allow for the presence of CP violation in decay, yields φs=0.02±0.17(stat)±0.02(syst)rad, |λ|=0.91-0.15+0.18(stat)±0.02(syst). This result is consistent with the standard model expectation.
National Science Foundation (U.S.)