Observation of Three Upsilon States

1980115 citationsJournal Article

Authors

D. Andrews · Cornell University

K. Berkelman · Cornell University

M. Billing · Cornell University

R. Cabenda · Cornell University

D. G. Cassel · Cornell University

J. W. DeWire · Cornell University

R. Ehrlich · Cornell University

Abstract

Three narrow resonances have been observed in ${e}^{+}{e}^{\ensuremath{-}}$ annihilation into hadrons at total energies between 9.4 and 10.4 GeV. Measurements of mass spacing and ratios of lepton pair widths support the interpretation of these "$\ensuremath{\Upsilon}$" states as the lowest triplet-$S$ levels of the $b\overline{b}$ quark-antiquark system.

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 44, Issue 17, pp. 1108-1111

DOI: 10.1103/physrevlett.44.1108

Field-Weighted Citation Impact: 37.98