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Article Dans Une Revue Journal of High Energy Physics Année : 2016

Measurement of the properties of the Ξ∗0b baryon

R. Aaij
  • Fonction : Auteur
J. Cogan
O. Leroy
J. Serrano

Résumé

We perform a search for near-threshold Ξ0b resonances decaying to Ξ−bπ+ in a sample of proton-proton collision data corresponding to an integrated luminosity of 3 fb−1 collected by the LHCb experiment. We observe one resonant state, with the following properties: m(Ξ∗0b)−m(Ξ−b)−m(π+)=15.727±0.068(stat)±0.023(syst)MeV/c2,Γ(Ξ∗0b)=0.90±0.16(stat)±0.08(syst)MeV. This confirms the previous observation by the CMS collaboration. The state is consistent with the JP=3/2+ Ξ∗0b resonance expected in the quark model. This is the most precise determination of the mass and the first measurement of the natural width of this state. We have also measured the ratio σ(pp→Ξ∗0bX)B(Ξ∗0b→Ξ−bπ+)σ(pp→Ξ−bX)=0.27±0.03(stat)±0.01(syst).

Dates et versions

in2p3-01304102 , version 1 (19-04-2016)

Identifiants

Citer

R. Aaij, L. Beaucourt, M. Chefdeville, D. Decamp, N. Déléage, et al.. Measurement of the properties of the Ξ∗0b baryon. Journal of High Energy Physics, 2016, 05, pp.161. ⟨10.1007/JHEP05(2016)161⟩. ⟨in2p3-01304102⟩
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