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Measurements of the CKM angle γ at the LHCb experiment

Two measurements of the Cabibbo-Kobayashi-Maskawa angle &gamma; using B &rarr; DK and B<sup>0</sup> &rarr; DK<sup>&ast;0</sup> decays are presented in this thesis. The subsequent D meson decays to the K<sub>S</sub><sup>0</sup>&pi;<sup>+</sup>&pi;<sup>−</sup> and K<sub>S</sub><sup>0</sup>K<sup>+</sup>K<sup>−</sup> final states are studied using a binned Dalitz plot analysis. The D strong-phase variation over the Dalitz plot is taken from measurements performed at the CLEO-c experiment, making the analysis independent of a model to describe the D decay amplitude. Both measurements are performed using proton-proton collision data collected by the Large Hadron Collider beauty (LHCb) experiment in 2011 and 2012, corresponding to an integrated luminosity of 3 fb<sup>−1</sup> at centre-of-mass energies &radic;s = 7 TeV and 8 TeV. The value &gamma;= (62 <sup>+15</sup><sub style='position: relative; left: -1.7em;'>−14</sub>)° is measured using B<sup>0</sup> &rarr; DK<sup>&ast;0</sup> decays and &gamma; = (71 ± 20)° is measured using B<sup>0</sup> &rarr; DK<sup>&ast;0</sup> decays, with a second solution for each value corresponding to &gamma; + 180°. The measurements are consistent with the world average value of &gamma;.

Identiferoai:union.ndltd.org:bl.uk/oai:ethos.bl.uk:724887
Date January 2016
CreatorsCheung, Shu-Faye
ContributorsHarnew, Neville ; Malde, Sneha
PublisherUniversity of Oxford
Source SetsEthos UK
Detected LanguageEnglish
TypeElectronic Thesis or Dissertation
Sourcehttps://ora.ox.ac.uk/objects/uuid:414ae71c-d72e-45bb-93fa-36afba4ae9a4

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