Measurements of branching fractions of Ac plus , E plus η and Ac plus , E plus ηi and asymmetry parameters of Ac+, E+π0, Ac+, E+ η, and Ac plus , E plus ηi

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F23%3A10476394" target="_blank" >RIV/00216208:11320/23:10476394 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=_fDh62_9kW" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=_fDh62_9kW</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevD.107.032003" target="_blank" >10.1103/PhysRevD.107.032003</a>

Result language
angličtina
Original language name
Measurements of branching fractions of Ac plus , E plus η and Ac plus , E plus ηi and asymmetry parameters of Ac+, E+π0, Ac+, E+ η, and Ac plus , E plus ηi
Original language description
We report a study of A+c , E+pi 0, A+c , E+eta, and A+c , E+ eta i using the data sample correspon-ding to an integrated luminosity of 980 fb-1 collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. The branching fractions relative to A+c , E+pi 0 are measured as BA+c,E+eta=BA+c,E+pi 0 = 0.25 +/- 0.03 +/- 0.01 and BA+c,E+eta i=BA+c,E+pi 0 = 0.33 +/- 0.06 +/- 0.02. Using BA+c,E+pi 0 = (1.25 +/- 0.10)%, we obtain BA+c,E+eta = (3.14 +/- 0.35 +/- 0.17 +/- 0.25) x 10-3 and BA+c,E+eta i = (4.16 +/- 0.75 +/- 0.25 +/- 0.33) x 10-3. Here the uncertainties are statistical, systematic, and from BA+c,E+pi 0, respectively. The ratio of the branching fraction of A+c , E+eta i with respect to that of A+c , E+eta is measured to be BA+c,E+eta i=BA+c,E+eta = 1.34 +/- 0.28 +/- 0.08. We update the asymmetry parameter of A+c , E+pi 0, alpha E+pi 0 = -0.48 +/- 0.02 +/- 0.02, with a considerably improved precision. The asymmetry parameters of A+c , E+eta and A+c , E+eta i are measured to be alpha E+eta = -0.99 +/- 0.03 +/- 0.05 and alpha E+eta i = -0.46 +/- 0.06 +/- 0.03 for the first time.
Czech name
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Czech description
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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

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)

Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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