Measurement of the B+/B0 production ratio in e+e- collisions at the γ(4S) resonance using B → J/ψ(ll)K decays at Belle
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F23%3A10476455" target="_blank" >RIV/00216208:11320/23:10476455 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=jP5rHM7bzo" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=jP5rHM7bzo</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevD.107.L031102" target="_blank" >10.1103/PhysRevD.107.L031102</a>
Alternative languages
Result language
angličtina
Original language name
Measurement of the B+/B0 production ratio in e+e- collisions at the γ(4S) resonance using B → J/ψ(ll)K decays at Belle
Original language description
We measure the ratio of branching fractions for the gamma(4S) decays to B+/B- and B-0(B) over barB(0) using B+ -> J/psi(ll)K+ and B-0 -> J/psi(ll)K-0 samples, where J/psi(ll) stands for J/psi -> l(+)l(-) (l = e or mu), with 711 fb(-1) of data collected at the gamma(4S) resonance with the Belle detector. We find the decay rate ratio of gamma(4S) -> B-0(B) over barB(0) over gamma(4S) -> B-0(B) over barB(0) to be 1.065 +/- 0.012 +/- 0.019 +/- 0.047, which is the most precise measurement to date. The first and second uncertainties are statistical and systematic, respectively, and the third uncertainty is due to the assumption of isospin symmetry in B -> J/psi(ll)K.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10300 - Physical sciences
Result continuities
Project
<a href="/en/project/GA22-18469S" target="_blank" >GA22-18469S: Studies of the Beyond Standard Model phenomena in the flavor sector with the Belle II Experiment</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physical Review D
ISSN
2470-0010
e-ISSN
2470-0029
Volume of the periodical
107
Issue of the periodical within the volume
3
Country of publishing house
US - UNITED STATES
Number of pages
6
Pages from-to
L031102
UT code for WoS article
000989327600014
EID of the result in the Scopus database
2-s2.0-85149623973