Measurements of charm mixing and CP violation using D[superscript 0] → K [supercript ±]π [superscript ∓] decays
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PhysRevD.95.052004.pdf
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Author(s)
Aaij, R.
Adeva, B.
Adinolfi, M.
Ajaltouni, Z.
Akar, S.
Albrecht, J.
Alessio, F.
Alexander, M.
Ali, S.
Alkhazov, G.
Alternative Title
Measurements of charm mixing and CP violation using D0 → K±π∓ decays
Date Issued
March 2017
Journal
Physical Review D
Publisher
American Physical Society
Citation
Aaij, R. et al. “Measurements of Charm Mixing and C P Violation Using D[superscript 0] → K[superscript ±]π[superscript ∓] Decays.” Physical Review D 95.5 (2017): n. pag. © 2017 CERN for the LHCb Collaboration
Version
Final published version
Abstract
Measurements of charm mixing and CP violation parameters from the decay-time-dependent ratio of D[superscript 0]→K[superscript +]π[superscript -] to D[superscript 0]→K[superscript -]π[superscript +] decay rates and the charge-conjugate ratio are reported. The analysis uses [bar over B]→D[superscript *+]μ[superscript -]X, and charge-conjugate decays, where D[superscript *+]→D[superscript 0]π[superscript +], and D[superscript 0]→K[superscript ∓]π[superscript ±]. The pp collision data are recorded by the LHCb experiment at center-of-mass energies √s =7 and 8 TeV, corresponding to an integrated luminosity of 3 fb[superscript -1]. The data are analyzed under three hypotheses: (i) mixing assuming CP symmetry, (ii) mixing assuming no direct CP violation in the Cabibbo-favored or doubly Cabibbo-suppressed decay amplitudes, and (iii) mixing allowing either direct CP violation and/or CP violation in the superpositions of flavor eigenstates defining the mass eigenstates. The data are also combined with those from a previous LHCb study of D[superscript 0]→Kπ decays from a disjoint set of D[superscript *+] candidates produced directly in pp collisions. In all cases, the data are consistent with the hypothesis of CP symmetry.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
http://dx.doi.org/10.1103/PhysRevD.95.052004
