Measurement of the Difference of Time-Integrated <i>CP</i> Asymmetries in <i>D</i><SUP>0</SUP> → <i>K</i><SUP>-</SUP><i>K</i><SUP>+</SUP> and <i>D</i><SUP>0</SUP> → π<SUP>-</SUP>π<SUP>+</SUP> Decays



Aaij, R, Abellan Beteta, C, Adeva, B, Adinolfi, M, Affolder, A, Ajaltouni, Z, Akar, S, Albrecht, J, Alessio, F, Alexander, M
et al (show 721 more authors) (2016) Measurement of the Difference of Time-Integrated <i>CP</i> Asymmetries in <i>D</i><SUP>0</SUP> → <i>K</i><SUP>-</SUP><i>K</i><SUP>+</SUP> and <i>D</i><SUP>0</SUP> → π<SUP>-</SUP>π<SUP>+</SUP> Decays. PHYSICAL REVIEW LETTERS, 116 (19). 191601-.

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Abstract

A search for CP violation in D^{0}→K^{-}K^{+} and D^{0}→π^{-}π^{+} decays is performed using pp collision data, corresponding to an integrated luminosity of 3  fb^{-1}, collected using the LHCb detector at center-of-mass energies of 7 and 8 TeV. The flavor of the charm meson is inferred from the charge of the pion in D^{*+}→D^{0}π^{+} and D^{*-}→D[over ¯]^{0}π^{-} decays. The difference between the CP asymmetries in D^{0}→K^{-}K^{+} and D^{0}→π^{-}π^{+} decays, ΔA_{CP}≡A_{CP}(K^{-}K^{+})-A_{CP}(π^{-}π^{+}), is measured to be [-0.10±0.08(stat)±0.03(syst)]%. This is the most precise measurement of a time-integrated CP asymmetry in the charm sector from a single experiment.

Item Type: Article
Additional Information: All figures and tables, along with any supplementary material and additional information, are available at http://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2015-055.html
Uncontrolled Keywords: LHCb Collaboration
Depositing User: Symplectic Admin
Date Deposited: 07 Jun 2016 11:29
Last Modified: 17 Oct 2023 01:03
DOI: 10.1103/PhysRevLett.116.191601
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3001566