Header

UZH-Logo

Maintenance Infos

Observation of $B_{c}^{+}→D^{0}K^{+}$+ decays


Bernet, R; Müller, K; Serra, N; Steinkamp, O; Straumann, U; Vollhardt, A; et al (2017). Observation of $B_{c}^{+}→D^{0}K^{+}$+ decays. Physical Review Letters, 118(11):111803.

Abstract

Using proton-proton collision data corresponding to an integrated luminosity of 3.0  $fb^{-1}$, recorded by the LHCb detector at center-of-mass energies of 7 and 8 TeV, the $B_{c}^{+}→D^{0}K^{+}$ decay is observed with a statistical significance of 5.1 standard deviations. By normalizing to $B^{+}→D[over ¯]^{0}π^{+}$ decays, a measurement of the branching fraction multiplied by the production rates for $B_{c}^{+}$ relative to$ B^{+}$ mesons in the LHCb acceptance is obtained, $R_{D^{0}K}=(f_{c}/f_{u})×B(B_{c}^{+}→D^{0}K^{+})=(9.3_{-2.5}^{+2.8}±0.6)×10^{-7}$, where the first uncertainty is statistical and the second is systematic. This decay is expected to proceed predominantly through weak annihilation and penguin amplitudes, and is the first $B_{c}^{+}$ decay of this nature to be observed.

Abstract

Using proton-proton collision data corresponding to an integrated luminosity of 3.0  $fb^{-1}$, recorded by the LHCb detector at center-of-mass energies of 7 and 8 TeV, the $B_{c}^{+}→D^{0}K^{+}$ decay is observed with a statistical significance of 5.1 standard deviations. By normalizing to $B^{+}→D[over ¯]^{0}π^{+}$ decays, a measurement of the branching fraction multiplied by the production rates for $B_{c}^{+}$ relative to$ B^{+}$ mesons in the LHCb acceptance is obtained, $R_{D^{0}K}=(f_{c}/f_{u})×B(B_{c}^{+}→D^{0}K^{+})=(9.3_{-2.5}^{+2.8}±0.6)×10^{-7}$, where the first uncertainty is statistical and the second is systematic. This decay is expected to proceed predominantly through weak annihilation and penguin amplitudes, and is the first $B_{c}^{+}$ decay of this nature to be observed.

Statistics

Citations

Altmetrics

Downloads

3 downloads since deposited on 14 Dec 2017
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:March 2017
Deposited On:14 Dec 2017 14:44
Last Modified:15 Dec 2017 00:45
Publisher:American Physical Society
ISSN:0031-9007
Publisher DOI:https://doi.org/10.1103/PhysRevLett.118.111803
PubMed ID:28368647

Download

Download PDF  'Observation of $B_{c}^{+}→D^{0}K^{+}$+ decays'.
Preview
Content: Published Version
Language: English
Filetype: PDF
Size: 302kB
View at publisher
Licence: Creative Commons: Attribution 4.0 International (CC BY 4.0)