Search for CP violation in D0→KS0KS0 decays in proton–proton collisions at s=13TeV.
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| Title: | Search for CP violation in D0→KS0KS0 decays in proton–proton collisions at s=13TeV. |
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| Authors: | CMS Collaboration (AUTHOR), Hayrapetyan, A.1 (AUTHOR), Tumasyan, A.1,2 (AUTHOR), Adam, W.3 (AUTHOR), Andrejkovic, J. W.3 (AUTHOR), Bergauer, T.3 (AUTHOR), Chatterjee, S.3,4 (AUTHOR), Damanakis, K.3 (AUTHOR), Dragicevic, M.3 (AUTHOR), Hussain, P. S.3 (AUTHOR), Jeitler, M.3,5 (AUTHOR), Krammer, N.3 (AUTHOR), Li, A.3 (AUTHOR), Liko, D.3 (AUTHOR), Mikulec, I.3 (AUTHOR), Schieck, J.3,5 (AUTHOR), Schöfbeck, R.3 (AUTHOR), Schwarz, D.3 (AUTHOR), Sonawane, M.3 (AUTHOR), Templ, S.3 (AUTHOR) |
| Source: | European Physical Journal C -- Particles & Fields. Dec2024, Vol. 84 Issue 12, p1-26. 26p. |
| Subjects: | CP violation, Hadron decay, Mesons, Hadrons, Pions, Proton-proton interactions |
| Abstract: | A search is reported for charge-parity CP violation in D 0 → K S 0 K S 0 decays, using data collected in proton–proton collisions at s = 13 Te V recorded by the CMS experiment in 2018. The analysis uses a dedicated data set that corresponds to an integrated luminosity of 41.6 fb - 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 π + and D ∗ - → D ¯ 0 π - . The CP asymmetry in D 0 → K S 0 K S 0 is measured to be A CP (K S 0 K S 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 π + 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. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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| Abstract: | A search is reported for charge-parity CP violation in D 0 → K S 0 K S 0 decays, using data collected in proton–proton collisions at s = 13 Te V recorded by the CMS experiment in 2018. The analysis uses a dedicated data set that corresponds to an integrated luminosity of 41.6 fb - 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 π + and D ∗ - → D ¯ 0 π - . The CP asymmetry in D 0 → K S 0 K S 0 is measured to be A CP (K S 0 K S 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 π + 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. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 14346044 |
| DOI: | 10.1140/epjc/s10052-024-13244-0 |
