Measurement of mass and width of the excited charmed meson states D₁⁰ and D₂^*0 at CDF

Authors

A. Abulencia, University of Illinois, Urbana
Kenneth A. Bloom, University of Nebraska-LincolnFollow
CDF Collaboration

Date of this Version

3-2-2006

Comments

Published by American Physical Society. Phys. Rev. D 73, 051104 (2006). http://prd.aps.org. Copyright © 2006 American Physical Society. Permission to use.

Abstract

We report on precision measurements of the masses and widths of the narrow, orbitally excited states D₁⁰ and D₂^*0 using the CDF II detector at the Fermilab Tevatron. Both states (collectively called D^**) are reconstructed in the decay channel D^** → D^*+ π^-. The D₂^*0 is also reconstructed in the D^** → D⁺ π^- channel. Using a data set with an integrated luminosity of 210 pb^-1, the measured masses and widths for the D₁⁰ are 2421.7 ± 0.7 ± 0.6 MeV/c² and 20.0 ± 1.7 ± 1:3 MeV/c² respectively, while for the D₂^*0 they are 2463.3 ± 0.6 ± 0.8 MeV/c² and 49.2 ± 2.3 ± 1.2 MeV/c². These values are currently the single best measurements available.