Measurement of the D0 RIGHTWARDS ARROW K- π+ e+ e- branching fraction and search for D0 RIGHTWARDS ARROW π+ π- e+ e- and D0 RIGHTWARDS ARROW K+ K- e + e - decays at Belle

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F25%3A10511007" target="_blank" >RIV/00216208:11320/25:10511007 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=HI-Q.BEEQ7" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=HI-Q.BEEQ7</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/mkx8-cl23" target="_blank" >10.1103/mkx8-cl23</a>

Result language
angličtina
Original language name
Measurement of the D0 RIGHTWARDS ARROW K- π+ e+ e- branching fraction and search for D0 RIGHTWARDS ARROW π+ π- e+ e- and D0 RIGHTWARDS ARROW K+ K- e + e - decays at Belle
Original language description
We present a study of the rare charm meson decays D-0 -> K(+)K(-)e(+)e(-), pi(+) pi(-)e(+)e(-), and K- pi(+)e(+)e(-) using a 942 fb(-1) dataset collected by the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We identify D-0 candidates via the charge of the pion from D*(+) -> D-0 pi(+) decays and normalize the branching fractions to D0. K-pi(+) pi(-) pi(+) decays. The branching fraction for decay D-0 -> K- pi(+)e(+)e(-) is measured to be (39.6 +/- 4.5 (stat) +/- 2.9 (syst)) x 10(-7), with the dielectron mass in the rho/omega mass region 675 < m(ee) < 875 MeV/c(2). We also search for D-0 -> h(-)h((')+)e(+)e(-) (h((')) = K, pi) decays with the dielectron mass near the. and. resonances, and away from these resonances for the K(+)K(-)e(+)e(-) and pi(+) pi(-)e(+)e(-). For these modes, we find no significant signals and set 90% confidence level upper limits on their branching fractions at the O(10(-7)) level.
Czech name
—
Czech description
—

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

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Similar results(10)