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Phys. Rev. Lett. 100, 082001 (2008) [7 pages]

Observation of Orbitally Excited Bs Mesons

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T. Aaltonen et al. CDF Collaboration
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Received 23 October 2007; published 28 February 2008

We report the observation of two narrow resonances consistent with states of orbitally excited (L=1) Bs mesons using 1  fb-1 of pp̅ collisions at s=1.96  TeV collected with the Collider Detector at Fermilab II detector at the Fermilab Tevatron. We use two-body decays into K- and B+ mesons reconstructed as B+J/ψK+, J/ψμ+μ- or B+D̅ 0π+, D̅ 0K+π-. We deduce the masses of the two states to be m(Bs1)=5829.4±0.7  MeV/c2 and m(Bs2*)=5839.6±0.7  MeV/c2.

© 2008 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.100.082001
DOI:
10.1103/PhysRevLett.100.082001
PACS:
14.40.Nd, 12.40.Yx