Study of the ${X^\pm(5568)}$ state with semileptonic decays of the ${B_s^0}$ meson

Abstract : 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.
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Submitted on : Monday, May 28, 2018 - 11:20:08 PM
Last modification on : Wednesday, May 20, 2020 - 10:18:57 AM

Citation

Victor Mukhamedovich Abazov, Braden Keim Abbott, Bannanje Sripath Acharya, Mark Raymond Adams, Todd Adams, et al.. Study of the ${X^\pm(5568)}$ state with semileptonic decays of the ${B_s^0}$ meson. Phys.Rev.D, 2018, 97 (9), pp.092004. ⟨10.1103/PhysRevD.97.092004⟩. ⟨hal-01802064⟩

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