Measurement of CP Violation Observables in D^{+}→K^{-}K^{+}π^{+} Decays.



Aaij, R, Abdelmotteleb, ASW, Abellan Beteta, C, Abudinén, F, Ackernley, T ORCID: 0000-0002-5951-3498, Adefisoye, AA, Adeva, B, Adinolfi, M, Adlarson, P, Agapopoulou, C
et al (show 1124 more authors) (2024) Measurement of CP Violation Observables in D^{+}→K^{-}K^{+}π^{+} Decays. Physical review letters, 133 (25). 251801-. ISSN 0031-9007, 1079-7114

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Abstract

A search for violation of the charge-parity (CP) symmetry in the D^{+}→K^{-}K^{+}π^{+} decay is presented, with proton-proton collision data corresponding to an integrated luminosity of 5.4  fb^{-1}, collected at a center-of-mass energy of 13 TeV with the LHCb detector. A novel model-independent technique is used to compare the D^{+} and D^{-} phase-space distributions, with instrumental asymmetries subtracted using the D_{s}^{+}→K^{-}K^{+}π^{+} decay as a control channel. The p value for the hypothesis of CP conservation is 8.1%. The CP asymmetry observables A_{CP|S}^{ϕπ^{+}}=(0.95±0.43_{stat}±0.26_{syst})×10^{-3} and A_{CP|S}^{K[over ¯]^{*0}K^{+}}=(-0.26±0.56_{stat}±0.18_{syst})×10^{-3} are also measured. These results show no evidence of CP violation and represent the most sensitive search performed through the phase space of a multibody decay.

Item Type: Article
Uncontrolled Keywords: LHCb Collaboration
Divisions: Faculty of Humanities and Social Sciences
Faculty of Science and Engineering
Faculty of Science and Engineering > School of Engineering
Faculty of Science and Engineering > School of Physical Sciences
Faculty of Humanities and Social Sciences > School of the Arts
Depositing User: Symplectic Admin
Date Deposited: 28 Jan 2025 16:05
Last Modified: 28 Jan 2025 16:05
DOI: 10.1103/physrevlett.133.251801
Open Access URL: https://journals.aps.org/prl/pdf/10.1103/PhysRevLe...
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3189946