Search for CP violation in D0 → KS0KS0 decays in proton-proton collisions at √s=13TeV

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F24%3A10494815" target="_blank" >RIV/00216208:11320/24:10494815 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=ivhqUKO47Q" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=ivhqUKO47Q</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1140/epjc/s10052-024-13244-0" target="_blank" >10.1140/epjc/s10052-024-13244-0</a>

Result language
angličtina
Original language name
Search for CP violation in D0 → KS0KS0 decays in proton-proton collisions at √s=13TeV
Original language description
A search is reported for charge-parity CP violation in D-0 -> (KSKS0)-K-0 decays, using data collected in proton-proton collisions at root s =13 TeV recorded by the CMS experiment in 2018. The analysis uses a dedicated data set that corresponds to an integrated luminosity of 41.6fb(-1), which consists of about 10 billion events containing a pair of b hadrons, nearly all of which decay to charm hadrons. The flavor of the neutral D meson is determined by the pion charge in the reconstructed decays D*(+) -> D-0 pi(+) and D*(-) -> (D) over bar (0)pi(-). The CP asymmetry in D-0 -> (KSKS0)-K-0 is measured to be A(CP)((KSKS0)-K-0) = (6.2 +/- 3.0 +/- 0.2 +/- 0.8)%, where the three uncertainties represent the statistical uncertainty, the systematic uncertainty, and the uncertainty in the measurement of the CP asymmetry in the D-0 -> K-S(0)pi(+)pi(-) decay. This is the first CP asymmetry measurement by CMS in the charm sector as well as the first to utilize a fully hadronic final state.
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
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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