Research Papers in Physics and Astronomy

 

Date of this Version

10-26-2007

Comments

Published by American Physical Society. Phys. Rev. Lett 99, 172001 (2007). http://prl.aps.org. Copyright © 2007 American Physical Society. Permission to use.

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+(*). The mass of B1 is measured to be 5720.6 ± 2.4 ± 1.4 MeV=c 2 and the mass difference ΔM between B2* and B1 is 26.2 ± 3.1 ± 0.9 MeV/c 2, giving the mass of the B2* as 5746.8 ± 2.4 ± 1.7 MeV/c 2. 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.

Included in

Physics Commons

Share

COinS