Szczegóły publikacji
Opis bibliograficzny
Study of
\[
D_{s1}(2460)^+ \to D_s^+ \pi^+ \pi^-
\]
in
\[
B \to \bar{D}^{(*)} D_s^+ \pi^+ \pi^-
\]
decays / Aaij Roel, Bhom Jihyun, Borsuk Józef, Brodzicka Jolanta, Chernov Aleksei, Chrząszcz Marcin, Dudek Maciej, Dziurda Agnieszka, Giza Maciej, Goncerz Mateusz, Witek Mariusz et al. [LHCb Collab.] // Science Bulletin. — 2025 — vol. 70, s. 1432-1444.
Autorzy (1143)
Kolaboracje
- LHCb Collab.
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 279 |
|---|---|
| Tekst źródłowy | URL |
| Punktacja ministerialna | 140 |
| Rok publikacji | 2025 |
| Creative Commons |  |
| Otwarty dostęp |  |
| Typ publikacji | artykuł |
| Czasopismo/seria | Science Bulletin |
| Indeksowane w |
Abstract
An amplitude analysis of the Ds1(2460)+→Ds+π+π- transition is performed simultaneously in B0→D-Ds+π+π-, B+→D‾0Ds+π+π-, and B0→D*-Ds+π+π- decays. The study is based on a data sample of proton-proton collisions recorded with the LHCb detector at centre-of-mass energies of s=7,8, and 13 TeV, corresponding to a total integrated luminosity of 9fb-1. A clear double-peak structure is observed in the m(π+π-) spectrum of the Ds1(2460)+→Ds+π+π- decay. The data can be described either with a model including f0500,f0980, and f2(1270) resonances, in which the contributions of f0(980) and f2(1270) are unexpectedly large, or with a model including f0(500), a doubly charged open-charm tetraquark state Tcs¯++ and its isospin partner Tcs¯0. If the former is considered implausible, the Tcs¯ states are observed with high significance, and the data are consistent with isospin symmetry. When imposing isospin constraints between the two Tcs¯ states, their mass and width are determined to be (2327±13±13) MeV and (96±16-23+170) MeV, respectively, where the first uncertainty is statistical and the second is systematic. The mass is slightly below the DK threshold, and a spin-parity of 0+ is favoured with high significance. © 2025 Science China Press
