ar X iv : h ep - p h / 98 07 36 5 v 1 1 4 Ju l 1 99 8 PHENOMENOLOGICAL STUDY OF EXCITED BARYONS

ar X iv : h ep - p h / 96 12 25 2 v 2 2 1 Ju l 1 99 7 Large N c Limit of Spin - Flavor Breaking in Excited Baryon Levels

Spin-flavor symmetry breaking in the levels of excited Baryons are studied to leading order in the 1/N c expansion. This breaking occurs at zeroth order. For non-strange Baryons with a single quark excited, it is shown that to first order of perturbation theory the breaking is given by one 1-body operator (spin-orbit), and three 2-body operators, all involving the orbital angular momentum of th...

ar X iv : h ep - p h / 94 07 37 5 v 1 2 6 Ju l 1 99 4 Scaling Relation for Leptonic Constants of Higher Excitations in Heavy Quarkonium

Introduction

ar X iv : h ep - p h / 98 05 30 4 v 1 1 3 M ay 1 99 8 Λ b → Λ c P ( V ) Nonleptonic Weak Decays

ar X iv : h ep - p h / 98 05 28 6 v 1 1 1 M ay 1 99 8 LA - UR - 98 - 1915 Hadron Spectroscopy in Regge Phenomenology ∗

We show that linear Regge trajectories for mesons and baryons, and the cubic mass spectrum associated with them, determine expressions for the hadron masses in terms of the universal Regge slope α ′ alone. The ground state hadron masses as calculated from these expressions are in excellent agreement with experiment for α ′ = 0.85 GeV −2 .

ar X iv : h ep - p h / 94 07 39 7 v 1 2 9 Ju l 1 99 4 Analysis of the anomalous events e + e − → l + l −