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Phys. Rev. Lett. 99, 172001 (2007) [7 pages]

Properties of L=1 B1 and B2* Mesons

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V. M. Abazov et al. The D0 Collaboration
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Received 23 May 2007; published 23 October 2007

This Letter presents the first strong evidence for the resolution of the excited B mesons B1 and B2* as two separate states in fully reconstructed decays to B+(*)π-. The mass of B1 is measured to be 5720.6±2.4±1.4  MeV/c2 and the mass difference ΔM between B2* and B1 is 26.2±3.1±0.9  MeV/c2, giving the mass of the B2* as 5746.8±2.4±1.7  MeV/c2. The production rate for B1 and B2* mesons is determined to be a fraction (13.9±1.9±3.2)% of the production rate of the B+ meson.

© 2007 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.99.172001
DOI:
10.1103/PhysRevLett.99.172001
PACS:
14.40.Nd, 13.25.Hw