Szczegóły publikacji
Opis bibliograficzny
Amplitude analysis of $B^{+} \to \psi(2S)K^{+}\pi^{+}\pi^{−}$ decays / R. Aaij, [et al.], S. BASHIR, [et al.], S. HASHMI, [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.] // The Journal of High Energy Physics [Dokument elektroniczny]. — Czasopismo elektroniczne ; ISSN 1029-8479. — 2025 — iss. 1 art. no. 54, s. [1], 1-68. — Wymagania systemowe: Adobe Reader. — Bibliogr. s. 57-61, Abstr. — Publikacja dostępna online od: 2025-01-08. — P. Kopciewicz – dod. afiliacja: European Organization for Nuclear Research (CERN), Geneva, Switzerland
Autorzy (1116)
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 158837 |
|---|---|
| Data dodania do BaDAP | 2025-04-11 |
| Tekst źródłowy | URL |
| DOI | 10.1007/JHEP01(2025)054 |
| Rok publikacji | 2025 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp | |
| Creative Commons | |
| Czasopismo/seria | The Journal of High Energy Physics |
Abstract
The first full amplitude analysis of B+ → ψ(2S)K+π+π− decays is performed using proton-proton collision data corresponding to an integrated luminosity of 9 fb−1 recorded with the LHCb detector. The rich K+π+π− spectrum is studied and the branching fractions of the resonant substructure associated with the prominent K1(1270)+ contribution are measured. The data cannot be described by conventional strange and charmonium resonances only. An amplitude model with 53 components is developed comprising 11 hidden-charm exotic hadrons. New production mechanisms for charged charmonium-like states are observed. Significant resonant activity with spin-parity JP = 1+ in the ψ(2S)π+ system is confirmed and a multi-pole structure is demonstrated. The spectral decomposition of the ψ(2S)π+π− invariant-mass structure, dominated by X0 → ψ(2S)ρ(770)0 decays, broadly resembles the J/ψϕ spectrum observed in B+ → J/ψϕK+ decays. Exotic ψ(2S)K+π− resonances are observed for the first time.