First measurement of the Lambda(+)(c) -> p eta ' decay

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F22%3A10454440" target="_blank" >RIV/00216208:11320/22:10454440 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=VHI_WRZpn7" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=VHI_WRZpn7</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/JHEP03(2022)090" target="_blank" >10.1007/JHEP03(2022)090</a>

Result language
angličtina
Original language name
First measurement of the Lambda(+)(c) -> p eta ' decay
Original language description
We present the first measurement of the branching fraction of the singly Cabibbo-suppressed (SCS) decay Lambda(+)(c) -> p eta' with eta' -> eta pi(+)pi(-), using a data sample cor- responding to an integrated luminosity of 981 fb(-1), collected by the Belle detector at the KEKB e(+)e(-) asymmetric-energy collider. A significant Lambda(+)(c) -> p eta' signal is observed for the first time with a signal significance of 5.4 sigma. The relative branching fraction with respect to the normalization mode Lambda(+)(c) -> pK(-) pi(+) is measured to be B(Lambda(+)(c) -> p eta')/B(Lambda(+)(c) -> pK(-) pi(+)) = (7.54 +/- 1.32 +/- 0.73) x 10(-3), where the uncertainties are statistical and systematic, respectively. Using the world-average value of B(Lambda(+)(c) -> pK(-)pi(+)) = (6.28 +/- 0.32) x 10(-2), we obtain B(Lambda(+)(c) -> p eta') = (4.73 +/- 0.82 +/- 0.46 +/- 0.24) x 10(-4), where the uncertainties are statistical, systematic, and from B(Lambda(+)(c) -> pK(-) pi(+)), respectively.
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
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
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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