Header

UZH-Logo

Maintenance Infos

Measurements of charm mixing and $CP$ violation using $D^0 \to K^{\pm}\pi^{\mp}$ decays


LHCb Collaboration; Bernet, R; Müller, K; Serra, N; Steinkamp, O; Straumann, U; Vollhardt, A; et al (2017). Measurements of charm mixing and $CP$ violation using $D^0 \to K^{\pm}\pi^{\mp}$ decays. Physical review. D, 95(5):052004.

Abstract

Measurements of charm mixing and $CP$ violation parameters from the decay-time-dependent ratio of $D^0 \to K^+\pi^−$ to $D^0 \to K^−\pi^+$ decay rates and the charge-conjugate ratio are reported. The analysis uses $\overline{B} \to D^{*+}\mu^−X$, and charge-conjugate decays, where $D^{*+} \to D^0\pi^+$, and $D^0 \to K^{\pm}\pi^{\mp}$. The $pp$ collision data are recorded by the LHCb experiment at center-of-mass energies $\sqrt{s}$ = 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 $D^0 \to K\pi$ 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.

Abstract

Measurements of charm mixing and $CP$ violation parameters from the decay-time-dependent ratio of $D^0 \to K^+\pi^−$ to $D^0 \to K^−\pi^+$ decay rates and the charge-conjugate ratio are reported. The analysis uses $\overline{B} \to D^{*+}\mu^−X$, and charge-conjugate decays, where $D^{*+} \to D^0\pi^+$, and $D^0 \to K^{\pm}\pi^{\mp}$. The $pp$ collision data are recorded by the LHCb experiment at center-of-mass energies $\sqrt{s}$ = 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 $D^0 \to K\pi$ 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.

Statistics

Citations

Dimensions.ai Metrics
6 citations in Web of Science®
4 citations in Scopus®
Google Scholar™

Altmetrics

Downloads

4 downloads since deposited on 06 Feb 2018
4 downloads since 12 months
Detailed statistics

Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:Unspecified
Dewey Decimal Classification:Unspecified
Language:English
Date:2017
Deposited On:06 Feb 2018 13:53
Last Modified:19 Feb 2018 11:08
Publisher:American Physical Society
ISSN:2470-0010
OA Status:Hybrid
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.1103/PhysRevD.95.052004

Download

Download PDF  'Measurements of charm mixing and $CP$ violation using $D^0 \to K^{\pm}\pi^{\mp}$ decays'.
Preview
Content: Published Version
Filetype: PDF
Size: 403kB
View at publisher
Licence: Creative Commons: Attribution 4.0 International (CC BY 4.0)