Szczegóły publikacji
Opis bibliograficzny
Measurement of $D^0 − \bar{D}^0$ mixing and search for $CP$ violation with $D^0 \to K^+ \pi^-$ decays / R. Aaij, [et al.], P. KOPCIEWICZ, [et al.], M. W. MAJEWSKI, [et al.], A. OBŁĄKOWSKA-MUCHA, [et al.], J. RYŻKA, [et al.], T. SZUMLAK, [et al.], A. UKLEJA, [et al.] // Physical Review. D ; ISSN 2470-0010. — Tytuł poprz.: Physical Review D. Particles, fields, gravitation, and cosmology ; ISSN: 1550-7998. — 2025 — vol. 111 iss. 1 art. no. 012001, s. 012001-1–012001-25. — Bibliogr. s. 012001-17–012001-19, Abstr. — Publikacja dostępna online od: 2025-01-03. — P. Kopciewicz – dod. afiliacja: European Organization for Nuclear Research (CERN), Geneva, Switzerland
Autorzy (1090)
Dane bibliometryczne
| ID BaDAP | 159204 |
|---|---|
| Data dodania do BaDAP | 2025-05-13 |
| Tekst źródłowy | URL |
| DOI | 10.1103/PhysRevD.111.012001 |
| Rok publikacji | 2025 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Creative Commons | |
| Czasopismo/seria | Physical Review, D |
Abstract
A measurement of the time-dependent ratio of the D0→K+π- to D¯0→K+π- decay rates is reported. The analysis uses a sample of proton-proton collisions corresponding to an integrated luminosity of 6 fb-1 recorded by the LHCb experiment from 2015 through 2018 at a center-of-mass energy of 13 TeV. The D0 meson is required to originate from a D∗(2010)+→D0π+ decay, such that its flavor at production is inferred from the charge of the accompanying pion. The measurement is performed simultaneously for the K+ π- and K- π+ final states, allowing both mixing and CP-violation parameters to be determined. The value of the ratio of the decay rates at production is determined to be RKπ=(343.1±2.0)×10-5. The mixing parameters are measured to be cKπ=(51.4±3.5)×10-4 and cKπ′=(13±4)×10-6, where RKπcKπ is the linear coefficient of the expansion of the ratio as a function of decay time in units of the D0 lifetime, and cKπ′ is the quadratic coefficient, both averaged between the K+ π- and K- π+ final states. The precision is improved relative to the previous best measurement by approximately 60%. No evidence for CP violation is found.
