Szczegóły publikacji
Opis bibliograficzny
Precision measurement of the $\Xi^{0}_{b}$ baryon lifetime / 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.], J. MOROŃ, [et al.], A. OBŁĄKOWSKA-MUCHA, [et al.], K. M. SOWA, [et al.], K. ŚWIENTEK, [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. 112 iss. 5 art. no. 052012, s. 052012-1-052012-16. — Bibliogr. s. 052012-9-052012-10, Abstr. — Publikacja dostępna online od: 2025-09-29
Autorzy (1212)
Dane bibliometryczne
| ID BaDAP | 163796 |
|---|---|
| Data dodania do BaDAP | 2025-11-06 |
| Tekst źródłowy | URL |
| DOI | 10.1103/sllb-p3j8 |
| Rok publikacji | 2025 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Creative Commons | |
| Czasopismo/seria | Physical Review, D |
Abstract
A sample of 𝑝𝑝 collision data, corresponding to an integrated luminosity of 5.4 fb−1 and collected by the LHCb experiment during LHC Run 2, is used to measure the ratio of the lifetime of the Ξ0 𝑏 baryon to that of the Λ0 𝑏 baryon, 𝑟𝜏≡𝜏Ξ0 𝑏/𝜏Λ0 𝑏. The value 𝑟Run 2 𝜏 =1.004 ±0.009 ±0.006 is obtained, where the first uncertainty is statistical and the second systematic. This value is averaged with the corresponding value from Run 1 to obtain 𝑟𝜏 =1.004 ±0.008 ±0.005. Multiplying by the known value of the Λ0𝑏 lifetime yields 𝜏Ξ0 𝑏=1.475±0.012±0.008±0.009 ps, where the last uncertainty is due to the limited knowledge of the Λ0𝑏 lifetime. This measurement improves the precision of the current world average of the Ξ0 𝑏 lifetime by about a factor of two, and is in good agreement with the most recent theoretical predictions.
