Properties of L = 1 B₁ and B₂^* Mesons

Authors

V. M. Abazov, Joint Institute for Nuclear Research, Dubna, Russia
Kenneth A. Bloom, University of Nebraska - LincolnFollow
Gregory R. Snow, University of Nebraska-LincolnFollow
D0 Collaboration

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.