Observation of Orbitally Excited B_s Mesons

Details Observation of Orbitally Excited B_s Mesons Observation of Orbitally Excited B_s Mesons

2007-10-23

arxiv.org/abs/0710.4199v2

Phys.Rev.Lett.100:082001,2008

Physics

High Energy Physics

High Energy Physics - Experiment

Version accepted and published by Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.100.082001

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/\psi K^+, J/\psi \to \mu^+ \mu^- or B^+ \to \bar{D}^0 \pi^+, \bar{D}^0 \to K^+ \pi^-. 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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