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 Ds+ → 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}^{anti-K*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.

Aaij, R., Abdelmotteleb, A. . ., Abellan Beteta, C., Abudinén, F., Ackernley, T., Adefisoye, A. ., et al. (2024). Measurement of CP Violation Observables in D+ → K− K+ π+ Decays. PHYSICAL REVIEW LETTERS, 133(25), 1-13 [10.1103/physrevlett.133.251801].

Measurement of CP Violation Observables in D+ → K− K+ π+ Decays

Carbone, A.;Ferrari, F.;Galli, D.;Patrignani, C.;Spedicato, E.;Villa, A.;Zenesini, F.;
2024

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 Ds+ → 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}^{anti-K*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.
2024
Aaij, R., Abdelmotteleb, A. . ., Abellan Beteta, C., Abudinén, F., Ackernley, T., Adefisoye, A. ., et al. (2024). Measurement of CP Violation Observables in D+ → K− K+ π+ Decays. PHYSICAL REVIEW LETTERS, 133(25), 1-13 [10.1103/physrevlett.133.251801].
Aaij, R.; Abdelmotteleb, A.  S.  W.; Abellan Beteta, C.; Abudinén, F.; Ackernley, T.; Adefisoye, A.  A.; Adeva, B.; Adinolfi, M.; Adlarson, P.; Agapop...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/1002227
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