title: Relativistic symmetry suppresses quark spin-orbit splitting.
abstract: Experimental data indicate small spin-orbit splittings in hadrons. For heavy-light mesons we identify a relativistic symmetry that suppresses these splittings. We suggest an experimental test in electron-positron annihilation. Furthermore, we argue that the dynamics necessary for this symmetry are possible in QCD.
authors.affiliation: MS B283, Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
authors.forename: P R
authors.initials: PR
authors.lastname: Page
authors.forename: T
authors.initials: T
authors.lastname: Goldman
authors.forename: J N
authors.initials: JN
authors.lastname: Ginocchio