A search for resonance like structures in the B0s π± invariant mass spectrum is performed using proton proton collision data collected by the CMS experiment at the LHC at √s = 8 TeV, corresponding to an integrated luminosity of 19.7 fb−1. The B0s mesons are reconstructed in the decay chain B0s → J/ψ ϕ, with J/ψ → μ+μ− and ϕ → K+K−. The B0s π± invariant mass distribution shows no statistically significant peaks for different selection requirements on the reconstructed B0s and π± candidates. Upper limits are set on the relative production rates of the X(5568) and B0s states times the branching fraction of the decay X(5568)± → B0s π±. In addition, upper limits are obtained as a function of the mass and the natural width of possible exotic states decaying into B0s π±.
Search for the X (5568) State Decaying into Bs0 π± in Proton-Proton Collisions at √s = 8 TeV
Ravera, F.;Meridiani, P.;Amapane, N.;Argiro, S.;Bellan, R.;Costa, M.;Covarelli, R.;Kiani, B.;Migliore, E.;Monaco, V.;Monteil, E.;Obertino, M. M.;Pacher, L.;Pinna Angioni, G. L.;Romero, A.;Sacchi, R.;Sola, V.;Solano, A.;
2018-01-01
Abstract
A search for resonance like structures in the B0s π± invariant mass spectrum is performed using proton proton collision data collected by the CMS experiment at the LHC at √s = 8 TeV, corresponding to an integrated luminosity of 19.7 fb−1. The B0s mesons are reconstructed in the decay chain B0s → J/ψ ϕ, with J/ψ → μ+μ− and ϕ → K+K−. The B0s π± invariant mass distribution shows no statistically significant peaks for different selection requirements on the reconstructed B0s and π± candidates. Upper limits are set on the relative production rates of the X(5568) and B0s states times the branching fraction of the decay X(5568)± → B0s π±. In addition, upper limits are obtained as a function of the mass and the natural width of possible exotic states decaying into B0s π±.| File | Dimensione | Formato | |
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PhysRevLett.120.202005.pdf
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