Observation and Properties of L=1 B_1 and B_2* Mesons

Details Observation and Properties of L=1 B_1 and B_2* Mesons Observation and Properties of L=1 B_1 and B_2* Mesons

2007-05-22

arxiv.org/abs/0705.3229v1

Phys.Rev.Lett.99:172001,2007

Physics

High Energy Physics

High Energy Physics - Experiment

8 pages, 2 figures. Submitted to Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.99.172001

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.

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