A 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.

Zhokin, A., Zhizhin, I., Zarubin, A., Yuldashev, B., Voytishin, N., Vorobyev, A., et al. (2024). Search for CP violation in D0→KS0KS0 decays in proton–proton collisions at s=13TeV. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 84(12) [10.1140/epjc/s10052-024-13244-0].

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

Zuolo D.;de Fatis T. T.;Ragazzi S.;Pizzati G.;Pinolini B. S.;Perego A.;Palluotto S.;Paganoni M.;Moroni L.;Massironi A.;Malberti M.;Lucchini M. T.;Guzzi L.;Govoni P.;Ghezzi A.;Gerosa R.;Dinardo M. E.;De Guio F.;Cetorelli F.;Brivio F.;Benaglia A.;Xiao J.;
2024

Abstract

A 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.
Articolo in rivista - Articolo scientifico
Bosons; Decay (organic); Tellurium compounds; Uncertainty analysis
English
6-dic-2024
2024
84
12
1264
open
Zhokin, A., Zhizhin, I., Zarubin, A., Yuldashev, B., Voytishin, N., Vorobyev, A., et al. (2024). Search for CP violation in D0→KS0KS0 decays in proton–proton collisions at s=13TeV. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 84(12) [10.1140/epjc/s10052-024-13244-0].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/576283
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