Measurement of the Difference of Time-Integrated CP Asymmetries in D[superscript 0] → K[superscript −]K[superscript +] and D[superscript 0] → π[superscript −]π[superscript +] Decays
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PhysRevLett.116.191601.pdf
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Author(s)
Aaij, R.
Abellán Beteta, C.
Adeva, B.
Adinolfi, M.
Affolder, A.
Ajaltouni, Z.
Akar, S.
Albrecht, J.
Alessio, F.
Alexander, M.
Date Issued
May 2016
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Aaij, R., C. Abellan Beteta, B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, S. Akar, et al. “Measurement of the Difference of Time-Integrated CP Asymmetries in D[superscript 0] → K[superscript −]K[superscript +] and D[superscript 0] → π[superscript −]π[superscript +] Decays.” Physical Review Letters 116, no. 19 (May 9, 2016). © 2016 CERN, for the LHCb Collaboration
Version
Final published version
Abstract
A search for CP violation in D[superscript 0] → K[superscript -]K[superscript +] and D[superscript 0] → π[superscript -]π[superscript +] decays is performed using pp collision data, corresponding to an integrated luminosity of 3 fb[superscript -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[superscript *+] → D[superscript 0]π[superscript +] and D[superscript *-] → [bar over D][superscript 0]π[superscript -] decays. The difference between the CP asymmetries in D[superscript 0] → K[superscript -]K[superscript +] and D[superscript 0] → π[superscript -]π[superscript +] decays, ΔA[subscript CP] ≡ A[subscript CP](K[superscript -]K[superscript +]) - A[subscript CP](π[superscript -]π[superscript +]), 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.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
http://dx.doi.org/10.1103/PhysRevLett.116.191601
