Observation of charmed strange meson pair production in ϒð2SÞ decays and in e + e - annihilation at s=10.52 GeV
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F23%3A10476464" target="_blank" >RIV/00216208:11320/23:10476464 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=BwcZIAU74u" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=BwcZIAU74u</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevD.108.112015" target="_blank" >10.1103/PhysRevD.108.112015</a>
Alternative languages
Result language
angličtina
Original language name
Observation of charmed strange meson pair production in ϒð2SÞ decays and in e + e - annihilation at s=10.52 GeV
Original language description
We observe the process ϒð2SÞ RIGHTWARDS ARROW DðÞþs D-sJ and continuum production eþe- RIGHTWARDS ARROW DðÞþs D-sJ atffiffiffisp1/410.52 GeV (and their charge conjugates) using the data samples collected by the Belle detector at KEKB,where D-sJ is Ds1ð2536Þ- or Ds2ð2573Þ-. Both D-sJ states are identified through their decay into K- D- ðÞ.We measure the products of branching fractions Bðϒð2SÞ RIGHTWARDS ARROW DðÞþs D-sJÞBðD-sJ RIGHTWARDS ARROW K- D- ðÞÞ and the Borncross sections σBornðeþe- RIGHTWARDS ARROW DðÞþs D-sJÞBðD-sJ RIGHTWARDS ARROW K- D- ðÞÞ, and then compare the ratios R1IDENTICAL TO Bðϒð2SÞ RIGHTWARDS ARROWDðÞþs D-sJÞ=Bðϒð2SÞ RIGHTWARDS ARROW μþμ-Þ for ϒð2SÞ decays and R2IDENTICAL TO σBornðeþe- RIGHTWARDS ARROW DðÞþs D-sJÞ=σBornðeþe- RIGHTWARDS ARROWμþμ-Þ for continuum production. We obtain R1=R21/4 9.7 2.3 1.1, 6.8 2.1 0.8,10.2 3.3 2.5, and 3.4 2.1 0.8 for the DþsDs1ð2536Þ-, Dþs Ds1ð2536Þ-, DþsDs2ð2573Þ-, andDþs Ds2ð2573Þ- final states in the D-sJ RIGHTWARDS ARROW K-D- ðÞ0 modes, respectively. The measured R1=R2 valuesindicate that the strong decay dominates in ϒð2SÞ RIGHTWARDS ARROW DðÞþs D-sJ processes. We also measure the ratios ofbranching fractions BðDs1ð2536Þ- RIGHTWARDS ARROW K0SDð2010Þ-Þ=BðDs1ð2536Þ- RIGHTWARDS ARROW K-Dð2007Þ0Þ 1/4 0.48 0.070.02 and BðDs2ð2573Þ- RIGHTWARDS ARROW K0SD-Þ=BðDs2ð2573Þ- RIGHTWARDS ARROW K-D0Þ 1/4 0.49 0.10 0.02, which are consistentwith isospin symmetry. The second ratio is the first measurement of this quantity. Here, the firstuncertainties are statistical and the second are systematic.
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
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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
108
Issue of the periodical within the volume
11
Country of publishing house
US - UNITED STATES
Number of pages
11
Pages from-to
112015
UT code for WoS article
001183110200001
EID of the result in the Scopus database
2-s2.0-85182383508