期刊
PHYSICS LETTERS B
卷 759, 期 -, 页码 171-177出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physletb.2016.05.068
关键词
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An effective supersymmetric QCD light-front Hamiltonian for hadrons composed of light quarks, which includes a spin-spin interaction between the hadronic constituents, is constructed by embedding superconformal quantum mechanics into AdS space. Aspecific breaking of conformal symmetry inside the graded algebra determines a unique effective quark-confining potential for light hadrons, as well as remarkable connections between the meson and baryon spectra. The results are consistent with the empirical features of the light-quark hadron spectra, including a universal mass scale for the slopes of the meson and baryon Regge trajectories and a zero-mass pion in the limit of massless quarks. Our analysis is consistently applied to the excitation spectra of the pi, rho, K, K* and phi meson families as well as to the N, Delta, Lambda, Sigma, Sigma*, Xi and Xi* in the baryon sector. We also predict the existence of tetraquarks which are degenerate in mass with baryons with the same angular momentum. The mass of light hadrons is expressed in a universal and frame-independent decomposition in the semiclassical approximation described here. (C) 2016 The Authors. Published by Elsevier B.V.
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