Study of the X.sup.±./sup.(5568) state with semileptonic decays of the B.sup.0./sup..sub.s./sub. meson

0501233 - FZÚ 2019 RIV US eng J - Článek v odborném periodiku
Abazov, V. M. - Abbott, B. - Acharya, B.S. - Kupčo, Alexander - Lokajíček, Miloš - Royon, C. … celkem 372 autorů
Study of the X^±(5568) state with semileptonic decays of the B⁰_s meson.
Physical Review D. Roč. 97, č. 9 (2018), s. 1-19, č. článku 092004. ISSN 2470-0010. E-ISSN 2470-0029
Grant CEP: GA MŠMT LM2015068
Institucionální podpora: RVO:68378271
Klíčová slova: Batavia TEVATRON Coll * hadronic decay * decay modes * structure * experimental results * X(5568) --> B/s0 pi+ * X(5568) --> B/s0 pi-
Obor OECD: Particles and field physics
Impakt faktor: 4.368, rok: 2018

We present a study of the X±(5568) using semileptonic decays of the Bs0 meson using the full run II integrated luminosity of 10.4  fb-1 in proton-antiproton collisions at a center of mass energy of 1.96 TeV collected with the D0 detector at the Fermilab Tevatron Collider. We report evidence for a narrow structure, X±(5568), in the decay sequence X±(5568)→Bs0π± where Bs0→μ∓Ds±X, Ds±→ϕπ± which is consistent with the previous measurement by the D0 Collaboration in the hadronic decay mode, X±(5568)→Bs0π± where Bs0→J/ψϕ. The mass and width of this state are measured using a combined fit of the hadronic and semileptonic data, yielding m=5566.9-3.1+3.2(stat)-1.2+0.6(syst)  MeV/c2, Γ=18.6-6.1+7.9(stat)-3.8+3.5(syst)  MeV/c2 with a significance of 6.7σ.
Trvalý link: http://hdl.handle.net/11104/0293228