First Measurement of Γ(D*+)

2001122 citationsJournal Articlegreen Open Access

Authors

S. Ahmed · University at Albany, State University of New York

M. S. Alam · University at Albany, State University of New York

S. B. Athar · University at Albany, State University of New York

L. Jian · University at Albany, State University of New York

L. Ling · University at Albany, State University of New York

M. Saleem · University at Albany, State University of New York

S. Timm

Abstract

We present the first measurement of the D*(+) width using 9/fb of e(+)e(-) data collected near the Upsilon(4S) resonance by the CLEO II.V detector. Our method uses advanced tracking techniques and a reconstruction method that takes advantage of the small vertical size of the Cornell Electron-positron Storage Ring beam spot to measure the energy release distribution from the D*(+)-->D(0)pi(+) decay. We find gamma(D*(+)) = 96+/-4 (stat)+/-22 (syst) keV. We also measure the energy release in the decay and compute Delta m identical with m(D*(+))-m(D(0)) = 145.412+/-0.002 (stat)+/-0.012 (syst) MeV/c(2).

Topics & Keywords

Particle physics theoretical and experimental studies Quantum Chromodynamics and Particle Interactions High-Energy Particle Collisions Research

UN Sustainable Development Goals

Affordable and clean energy

Publication Details

Published in: Physical Review Letters

Volume 87, Issue 25, pp. 251801-251801

DOI: 10.1103/physrevlett.87.251801

Field-Weighted Citation Impact: 16.71