Search for charge-parity violation in semileptonically tagged D0K+ π- decays



Aaij, R, Abdelmotteleb, ASW, Abellan Beteta, C, Abudinen, F, Ackernley, T, Adefisoye, AA, Adeva, B, Adinolfi, M, Adlarson, P, Agapopoulou, C
et al (show 1127 more authors) (2025) Search for charge-parity violation in semileptonically tagged D0K+ π- decays JOURNAL OF HIGH ENERGY PHYSICS, 2025 (3). 149-. ISSN 1126-6708, 1029-8479

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Abstract

An analysis of the flavour oscillations of the charmed neutral meson is presented. The ratio of D0 → K+π and D0 → Kπ+ decay rates is measured as a function of the decay time of the D0 meson and compared with the charge-conjugated system to search for charge-parity violation. The meson flavour at production is double-tagged by the charges of the muon and pion in the preceding B¯→D∗2010+μ−X and D(2010)+ → D0π+ decays, respectively. These decays are selected from proton-proton collision data collected by the LHCb experiment at a centre-of-mass energy of 13 TeV and corresponding to an integrated luminosity of 5.4 fb−1. The flavour oscillation parameters, relating to the differences in mass and width of the mass eigenstates, are found to be y′ = (5.8 ± 1.6) × 10−3 and (x′)2 = (0.0 ± 1.2) × 10−4. No evidence for charge-parity violation is seen either in the flavour oscillations or in the decay, where the direct charge-parity asymmetry is measured to be A<inf>D</inf> = (2.3 ± 1.7) %.

Item Type: Article
Uncontrolled Keywords: CP Violation, Oscillation, Charm Physics, Hadron-Hadron Scattering
Divisions: Faculty of Science & Engineering
Faculty of Science & Engineering > School of Engineering
Faculty of Science & Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 05 Jun 2025 07:15
Last Modified: 23 May 2026 09:55
DOI: 10.1007/JHEP03(2025)149
Open Access URL: https://link.springer.com/content/pdf/10.1007/JHEP...
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3193079
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