Szczegóły publikacji
Opis bibliograficzny
First evidence for direct CP violation in beauty to charmonium decays / R. Aaij, [et al.], S. BASHIR, [et al.], M. FIRLEJ, [et al.], T. FIUTOWSKI, [et al.], W. GOMUŁKA, [et al.], S. HASHMI, [et al.], M. IDZIK, [et al.], P. KOPCIEWICZ, [et al.], M. W. MAJEWSKI, [et al.], J. MOROŃ, [et al.], A. OBŁĄKOWSKA-MUCHA, [et al.], J. RYŻKA, [et al.], K. ŚWIENTEK, [et al.], T. SZUMLAK, [et al.], A. UKLEJA, [et al.] // Physical Review Letters ; ISSN 0031-9007. — 2025 — vol. 134 iss. 10 art. no. 101801, s. 101801-1–101801-13. — Bibliogr. s. 101801-6–101801-7, Abstr. — Publikacja dostępna online od: 2025-03-12. — P. Kopciewicz - dod. afiliacja: European Organization for Nuclear Research (CERN), Geneva, Switzerland
Autorzy (1151)
Dane bibliometryczne
| ID BaDAP | 159189 |
|---|---|
| Data dodania do BaDAP | 2025-05-13 |
| Tekst źródłowy | URL |
| DOI | 10.1103/PhysRevLett.134.101801 |
| Rok publikacji | 2025 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Creative Commons | |
| Czasopismo/seria | Physical Review Letters |
Abstract
The 𝐶𝑃 asymmetry and branching fraction of the Cabibbo-Kobayashi-Maskawa-suppressed decay 𝐵+ →𝐽/𝜓𝜋+ are precisely measured relative to the favored decay 𝐵+ →𝐽/𝜓𝐾+ using a sample of proton-proton collision data corresponding to an integrated luminosity of 5.4 fb−1 recorded at a center-of-mass energy of 13 TeV during 2016–2018. The results of the 𝐶𝑃 asymmetry difference and branching fraction ratio are Δ𝒜𝐶𝑃≡𝒜𝐶𝑃(𝐵+→𝐽/𝜓𝜋+)−𝒜𝐶𝑃(𝐵+→𝐽/𝜓𝐾+)=(1.29±0.49±0.08)×10−2, ℛ𝜋/𝐾≡[ℬ(𝐵+→𝐽/𝜓𝜋+)/ℬ(𝐵+→𝐽/𝜓𝐾+)]=(3.852±0.022±0.018)×10−2, where the first uncertainties are statistical and the second are systematic. A combination with previous LHCb results based on data collected at 7 and 8 TeV in 2011 and 2012 yields Δ𝒜𝐶𝑃 =(1.42 ±0.43 ±0.08) ×10−2 and ℛ𝜋/𝐾 =(3.846 ±0.018 ±0.018) ×10−2. The combined Δ𝒜𝐶𝑃 value deviates from zero by 3.2 standard deviations, providing the first evidence for direct 𝐶𝑃 violation in the amplitudes of beauty decays to charmonium final states.
