2026-10-18T23:57:06Zhttps://ebyu-rdlopen.rawdatalibrary.net/oai/requestoai:ebyu-rdlopen.rawdatalibrary.net:ebyu/111402026-10-18T21:13:14Zopenairedrivercom_ebyu_10000col_ebyu_10001Search for CP violation in D0→KS0KS0 decays in proton–proton collisions at s=13TeVZhokin, A.Zhizhin, I.Zarubin, A.Yuldashev, B.S.Voytishin, N.Vorobyev, A.Uzunian, A.Uvarov, L.Tulupov, A.Toropin, A.Tlisova, I.Teryaev, O.Terkulov, A.Sulimov, V.Sosnov, D.Snigirev, A.Smirnov, V.Slabospitskii, S.Skovpen, Y.Shulha, S.Shmatov, S.Shalaev, V.Sergeychik, V.Savrin, V.Savina, M.Radchenko, O.Popov, V.Polikarpov, S.Petrushanko, S.Perelygin, V.Palichik, V.Oreshkin, V.Obraztsov, S.Nikitenko, A.Murzin, V.Matveev, V.Malakhov, A.Makarenko, V.Lychkovskaya, N.Levchenko, P.Lanev, A.Krasnikov, N.Kozyrev, A.Korenkov, V.Konstantinov, D.Kodolova, O.Klyukhin, V.Kirsanov, M.Kirpichnikov, D.Kirakosyan, M.BosonsDecay (organic)Tellurium compoundsUncertainty analysisCharge-parityCharm+CP asymmetriesCP violationsD+ mesonsData setIntegrated luminosityProton proton collisionsReconstructed decaysUncertaintyHadronsA search is reported for charge-parity CP violation in D0→KS0KS0 decays, using data collected in proton–proton collisions at s=13TeV 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∗+→D0π+ and D∗-→D¯0π-. The CP asymmetry in D0→KS0KS0 is measured to be ACP(KS0KS0)=(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 D0→KS0π+π- 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. © The Author(s) 2024.Springer Nature2024Articlehttps://rdlopen.rawdatalibrary.net/r/ebyu/11140https://doi.org/10.1140/epjc/s10052-024-13244-01434-6044enEuropean Physical Journal Cinfo:eu-repo/semantics/openAccessinfo:eu-repo/semantics/articlehttps://ebyu-rdlopen.rawdatalibrary.net/tr/items/ebyu/11140