Measurement of $C\!P$ violation observables in $D^+\rightarrow K^-K^+\pi^+$ decays

• Main Authors: Albrecht, J, Amey, J. L, Anderlini, L, Ao, D, Da Silva, R. Ataíde, Bachmann, S, Barlow, R. J, Basels, J. M, Belous, K, Belyaev, I, Blake, T, Bolzonella, R, Bovill, M, Buonaura, A, Burr, C, Butter, J. S, Caillet, A. C, Ramirez, S. Calderon, Chen, C, Cogneras, E, Congedo, L, Dai, L, Davis, A, De Bruyn, K, De Lucia, E, Dobishuk, V, Durham, J. M, Ene, A, Epple, E, Esen, S, Fleuret, F, Gao, T. Q, Gaspar, C, Gerken, L. L, Girardey, L, Giugliano, C, Golobardes, E, Gys, T, Hammerich, J, Hansmann-Menzemer, S, Hennessy, K, Henry, L, Howarth, N, Kaminaris, D, Kar, C, Konoplyannikov, A, Kravchenko, P, Lantwin, O, Li, P, Liu, F. L, Liu, S, Salvia, A. Lobo, Lucarelli, C, Luo, Y, Ma, R, Escalero, R. Manera, Mikhasenko, M, Mitreska, B, Neri, N, Nicolini, J, Nicotra, D, Nogga, P, Normand, C, Nowak, G, Okhrimenko, O, Pappagallo, M, Pereima, D, Petrolini, A, Pietrzyk, G, Poeschl, T, Poslavskii, S, Resmi, P. K, Vidal, A. Romero, Rudolph, M. S, Diaz, M. Ruiz, Fernandez, R. A. Ruiz, Saavedra-Arias, J. J, Saranin, D, Sarpis, M, Sazak, H, Shekhtman, L, Song, R, Stahl, M, Szumlak, T, Tisserand, V, Machado, D. Torres, Trippl, C, Uecker, L. H, Van Hecke, H, van Veghel, M, Sierra, C. Vázquez, Vos, K, White, C, Wong, C. P, Wu, J, Xiang, Z, Xu, A, Xu, L, Zavertyaev, M, Zhang, J
• Format: Journal Article
• Language: English
• Published: 02.09.2024
• Subjects: Physics - High Energy Physics - Experiment
• DOI: 10.48550/arxiv.2409.01414

A search for violation of the charge-parity $C\!P$ symmetry in the $D^+\rightarrow K^-K^+\pi^+$ 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 $D^+_{s}\rightarrow K^-K^+\pi^+$ decay as a control channel. The $p$-value for the hypothesis of $C\!P$ conservation is $8.1\%$. The $C\!P$ asymmetry observables $A_{C\!P|S}^{\phi\pi^+} = (0.95 \pm 0.43_{stat} \pm 0.26_{syst})\times 10^{-3}$ and $A_{C\!P|S}^{\overline{K}^{*0}K^+} = (-0.26 \pm 0.56_{ stat} \pm 0.18_{syst})\times 10^{-3}$ are also measured. These results show no evidence of $C\!P$ violation and represent the most sensitive search performed through the phase space of a multibody decay.