A search for violation of the charge-parity (CP) symmetry in the D+->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 Ds+->K-K+pi+ decay as a control channel. The p value for the hypothesis of CP conservation is 8.1%. The CP asymmetry observables ACP|SPhipi+=(0.95 \pm 0.43 stat \pm 0.26syst)x10-3 and ACP|SKK-*0K+=(-0.26 \pm 0.56 stat \pm 0.18syst)x10-3 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.

Measurement of CP Violation Observables in D+ ->K-K+pi+ Decays

Bassi G.
Membro del Collaboration Group
;
Kleijne N.
Membro del Collaboration Group
;
Morello M. J.
Membro del Collaboration Group
;
Passaro D.
Membro del Collaboration Group
;
Pica L.
Membro del Collaboration Group
;
Riccardi D.
Membro del Collaboration Group
;
2024

Abstract

A search for violation of the charge-parity (CP) symmetry in the D+->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 Ds+->K-K+pi+ decay as a control channel. The p value for the hypothesis of CP conservation is 8.1%. The CP asymmetry observables ACP|SPhipi+=(0.95 \pm 0.43 stat \pm 0.26syst)x10-3 and ACP|SKK-*0K+=(-0.26 \pm 0.56 stat \pm 0.18syst)x10-3 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.
Measurement of CP Violation Observables in D+ →k-K+π+ Decays
2024
Settore FIS/01 - Fisica Sperimentale
Settore PHYS-01/A - Fisica sperimentale delle interazioni fondamentali e applicazioni
Hadronic decays; Charm Quark; Charmed mesons; CP violation; Hadron colliders; Particle Data Analysis
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11384/153963
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