Szczegóły publikacji
Opis bibliograficzny
Constraints on the photon polarisation in $b \to s\gamma$ transitions using $B^{0}_{s} \to \phi e^{+}e^{−}$ 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.] // The Journal of High Energy Physics [Dokument elektroniczny]. — Czasopismo elektroniczne ; ISSN 1029-8479 . — 2025 — iss. 3 art. no. 47, s. [1], 1–22. — Wymagania systemowe: Adobe Reader. — Bibliogr. s. 13–15, Abstr. — Publikacja dostępna online od: 2025-03-07. — P. Kopciewicz - dod. afiliacja: European Organization for Nuclear Research (CERN), Geneva, Switzerland
Autorzy (1141)
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 159190 |
|---|---|
| Data dodania do BaDAP | 2025-05-13 |
| Tekst źródłowy | URL |
| DOI | 10.1007/JHEP03(2025)047 |
| Rok publikacji | 2025 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Creative Commons | |
| Czasopismo/seria | The Journal of High Energy Physics |
Abstract
An angular analysis of the B0S → ϕe+e− decay is performed using the proton-proton collision dataset collected between 2011 and 2018 by the LHCb experiment, corresponding to an integrated luminosity of 9 fb−1 at centre-of-mass energies of 7, 8 and 13 TeV. The analysis is performed in the very low dielectron invariant mass-squared region between 0.0009 and 0.2615 GeV2/c4. The longitudinal polarisation fraction of the ϕ meson is measured to be less than 11.5% at 90% confidence level. The AReCPT observable, which is related to the lepton forward-backward asymmetry, is measured to be 0.116 ± 0.155 ± 0.006, where the first uncertainty is statistical and the second systematic. The transverse asymmetries, A(2)T and AImCPT, which are sensitive to the virtual photon polarisation, are found to be −0.045 ± 0.235 ± 0.014 and 0.002 ± 0.247 ± 0.016, respectively. The results are consistent with Standard Model predictions.
