Header

UZH-Logo

Maintenance Infos

Measurement of the $B^{\pm}$ production asymmetry and the CP asymmetry in $B^{\pm} \to J/\psi K^{\pm}$ decays


LHCb Collaboration; Bernet, R; Müller, K; Serra, N; Steinkamp, O; Straumann, U; Vollhardt, A; et al (2017). Measurement of the $B^{\pm}$ production asymmetry and the CP asymmetry in $B^{\pm} \to J/\psi K^{\pm}$ decays. Physical review. D, D95(5):052005.

Abstract

The $B^{\pm}$ meson production asymmetry in pp collisions is measured using $B^+ \to \overline{D}^0\pi^+$ decays. The data were recorded by the LHCb experiment during Run 1 of the LHC at center-of-mass energies of $\sqrt{s}$ = 7 and 8 TeV. The production asymmetries, integrated over transverse momenta in the range $2 < p_T < 30  GeV/c$, and rapidities in the range $2.1 < y < 4.5$ are measured to be
$\mathcal{A}_{prod}(B^+, \sqrt{s} = 7 TeV) = (−0.41 \pm 0.49 \pm 0.10) \times 10^{−2}$,
$\mathcal{A}_{prod}(B^+, \sqrt{s} = 8 TeV) = (−0.53 \pm 0.31 \pm 0.10) \times 10^{−2}$, where the first uncertainties are statistical and the second are systematic. These production asymmetries are used to correct the raw asymmetries of $B^+ \to J/\psi K^{\pm}$ decays, thus allowing a measurement of the CP asymmetry, $\mathcal{A}_{CP}(B^+ \to J/\psi K^{\pm}) = (0.09 \pm 0.27 \pm 0.07) \times 10^{−2}$.

Abstract

The $B^{\pm}$ meson production asymmetry in pp collisions is measured using $B^+ \to \overline{D}^0\pi^+$ decays. The data were recorded by the LHCb experiment during Run 1 of the LHC at center-of-mass energies of $\sqrt{s}$ = 7 and 8 TeV. The production asymmetries, integrated over transverse momenta in the range $2 < p_T < 30  GeV/c$, and rapidities in the range $2.1 < y < 4.5$ are measured to be
$\mathcal{A}_{prod}(B^+, \sqrt{s} = 7 TeV) = (−0.41 \pm 0.49 \pm 0.10) \times 10^{−2}$,
$\mathcal{A}_{prod}(B^+, \sqrt{s} = 8 TeV) = (−0.53 \pm 0.31 \pm 0.10) \times 10^{−2}$, where the first uncertainties are statistical and the second are systematic. These production asymmetries are used to correct the raw asymmetries of $B^+ \to J/\psi K^{\pm}$ decays, thus allowing a measurement of the CP asymmetry, $\mathcal{A}_{CP}(B^+ \to J/\psi K^{\pm}) = (0.09 \pm 0.27 \pm 0.07) \times 10^{−2}$.

Statistics

Citations

Dimensions.ai Metrics
2 citations in Web of Science®
1 citation in Scopus®
4 citations in Microsoft Academic
Google Scholar™

Altmetrics

Downloads

3 downloads since deposited on 01 Feb 2018
3 downloads since 12 months
Detailed statistics

Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Language:English
Date:2017
Deposited On:01 Feb 2018 12:53
Last Modified:19 Feb 2018 10:44
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.95.052005

Download

Download PDF  'Measurement of the $B^{\pm}$ production asymmetry and the CP asymmetry in $B^{\pm} \to J/\psi K^{\pm}$ decays'.
Preview
Content: Published Version
Filetype: PDF
Size: 528kB
View at publisher
Licence: Creative Commons: Attribution 4.0 International (CC BY 4.0)