# Properties of L=1 $B_1$ and B$_2^*$ mesons

Abstract : Excited B mesons B_1 and B_2* are observed directly for the first time as two separate states in fully reconstructed decays to B+(*) pi-. The mass of B_1 is measured to be (5720.6 +- 2.4 +- 1.4) MeV/c^2 and the mass difference DeltaM 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.
Document type :
Journal articles

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Submitted on : Wednesday, May 23, 2007 - 9:31:51 AM
Last modification on : Tuesday, October 19, 2021 - 10:50:20 PM

### Citation

V.M. Abazov, B. Abbott, M. Abolins, B.S. Acharya, M. Adams, et al.. Properties of L=1 $B_1$ and B$_2^*$ mesons. Physical Review Letters, American Physical Society, 2007, 99, pp.172001. ⟨10.1103/PhysRevLett.99.172001⟩. ⟨in2p3-00148681⟩

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