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

LHCb Collaboration

Research output: Contribution to JournalArticleAcademicpeer-review

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 ACP|Sφπ+=(0.95±0.43stat±0.26syst)×10-3 and ACP|SK̄∗0K+=(-0.26±0.56stat±0.18syst)×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.

Original languageEnglish
Article number251801
Pages (from-to)1-13
Number of pages13
JournalPhysical review letters
Volume133
Issue number25
Early online date16 Dec 2024
DOIs
Publication statusPublished - 20 Dec 2024

Bibliographical note

Publisher Copyright:
© 2024 CERN.

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