Properties of L=1 B1 and B2* Mesons

V. M. Abazov et al. (The D0 Collaboration)
Phys. Rev. Lett. 99, 172001 – Published 23 October 2007

Abstract

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±1.4MeV/c2 and the mass difference ΔM between B2* and B1 is 26.2±3.1±0.9MeV/c2, giving the mass of the B2* as 5746.8±2.4±1.7MeV/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.

  • Figure
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  • Received 23 May 2007

DOI:https://doi.org/10.1103/PhysRevLett.99.172001

©2007 American Physical Society

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Vol. 99, Iss. 17 — 26 October 2007

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