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Properties of L=1 B(1) and B∗(2) Mesons

Baringer, Philip S.
Bean, Alice
Hensel, Carsten
Moulik, Tania
Wilson, Graham Wallace
Abazov, V. M.
Abbott, B.
Abolins, M.
Acharya, B. S.
Adams, M.
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Abstract
This Letter presents the first strong evidence for the resolution of the excited B mesons B(1) and B∗(2) as two separate states in fully reconstructed decays to B(+)(*)π−. The mass of B(1) is measured to be 5720.6±2.4±1.4  MeV/c(2) and the mass difference ΔM between B∗(2) and B(1) is 26.2±3.1±0.9  MeV/c(2), giving the mass of the B∗(2) as 5746.8±2.4±1.7  MeV/c(2). The production rate for B(1) and B∗(2) mesons is determined to be a fraction (13.9±1.9±3.2)% of the production rate of the B(+) meson.
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This is the publisher's version, also available electronically from http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.99.172001.
Date
2007-10-23
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American Physical Society
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V. M. Abazov et al. (The D0 Collaboration). (2007). "Properties of L=1 B(1) and B∗(2) Mesons." Physical Review Letters, 99(17):172001. http://dx.doi.org/10.1103/PhysRevLett.99.172001.
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