Observation of charmed strange meson pair production in ϒð2SÞ decays and in e + e - annihilation at s=10.52 GeV
Identifikátory výsledku
Kód výsledku v 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>
Výsledek na webu
<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>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Observation of charmed strange meson pair production in ϒð2SÞ decays and in e + e - annihilation at s=10.52 GeV
Popis výsledku v původním jazyce
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.
Název v anglickém jazyce
Observation of charmed strange meson pair production in ϒð2SÞ decays and in e + e - annihilation at s=10.52 GeV
Popis výsledku anglicky
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.
Klasifikace
Druh
J<sub>imp</sub> - Článek v periodiku v databázi Web of Science
CEP obor
—
OECD FORD obor
10300 - Physical sciences
Návaznosti výsledku
Projekt
<a href="/cs/project/GA22-18469S" target="_blank" >GA22-18469S: Studium jevů za Standardním modelem ve flavor sektoru na experimentu Belle II</a><br>
Návaznosti
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Ostatní
Rok uplatnění
2023
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Physical Review D
ISSN
2470-0010
e-ISSN
2470-0029
Svazek periodika
108
Číslo periodika v rámci svazku
11
Stát vydavatele periodika
US - Spojené státy americké
Počet stran výsledku
11
Strana od-do
112015
Kód UT WoS článku
001183110200001
EID výsledku v databázi Scopus
2-s2.0-85182383508