Measurements of charm mixing and CP violation using D0 →k±π decays MEASUREMENTS of CHARM MIXING and CP ... R. AAIJ et al.

(LHCb Collaboration)

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Measurements of charm mixing and CP violation parameters from the decay-time-dependent ratio of D0→K+π- to D0→K-π+ decay rates and the charge-conjugate ratio are reported. The analysis uses B-→D∗+μ-X, and charge-conjugate decays, where D∗+→D0π+, and D0→Kπ±. 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-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 D0→Kπ decays from a disjoint set of D∗+ candidates produced directly in pp collisions. In all cases, the data are consistent with the hypothesis of CP symmetry.

Original languageEnglish (US)
Article number052004
JournalPhysical Review D
Volume95
Issue number5
DOIs
StatePublished - Mar 1 2017

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CP violation
decay
eigenvectors
collisions
symmetry
decay rates
center of mass
luminosity
energy

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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Measurements of charm mixing and CP violation using D0 →k±π decays MEASUREMENTS of CHARM MIXING and CP ... R. AAIJ et al. / (LHCb Collaboration).

In: Physical Review D, Vol. 95, No. 5, 052004, 01.03.2017.

Research output: Contribution to journalArticle

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abstract = "Measurements of charm mixing and CP violation parameters from the decay-time-dependent ratio of D0→K+π- to D0→K-π+ decay rates and the charge-conjugate ratio are reported. The analysis uses B-→D∗+μ-X, and charge-conjugate decays, where D∗+→D0π+, and D0→Kπ±. 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-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 D0→Kπ decays from a disjoint set of D∗+ candidates produced directly in pp collisions. In all cases, the data are consistent with the hypothesis of CP symmetry.",
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