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arXiv · 0710.4199

Observation of Orbitally Excited B_s Mesons

CDF Collaboration·T. Aaltonen
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Abstract

We report the first observation of two narrow resonances consistent with states of orbitally excited (L=1) B_s mesons using 1 fb^{-1} of ppbar collisions at sqrt{s} = 1.96 TeV collected with the CDF II detector at the Fermilab Tevatron. We use two-body decays into K^- and B^+ mesons reconstructed as B^+ \to J/ψK^+, J/ψ\to μ^+ μ^- or B^+ \to \bar{D}^0 π^+, \bar{D}^0 \to K^+ π^-. We deduce the masses of the two states to be m(B_{s1}) = 5829.4 +- 0.7 MeV/c^2 and m(B_{s2}^*) = 5839.7 +- 0.7 MeV/c^2.

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CDF Collaboration, T. Aaltonen. 2008-02-28. Observation of Orbitally Excited B_s Mesons. https://doi.org/10.1103/physrevlett.100.082001

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