Universal effective hadron dynamics from superconformal algebra

Brodsky, Stanley J.; de Teramond, Guy F.; Dosch, Hans Gunter; Lorce, Cedric

doi:10.1016/j.physletb.2016.05.068

Title: Universal effective hadron dynamics from superconformal algebra

Journal Article · Wed May 25 00:00:00 EDT 2016 · Physics Letters. B

DOI:https://doi.org/10.1016/j.physletb.2016.05.068· OSTI ID:1249395

Brodsky, Stanley J. ^[1]; de Teramond, Guy F. ^[2]; Dosch, Hans Gunter ^[3]; Lorce, Cedric ^[4]

SLAC National Accelerator Lab., Menlo Park, CA (United States)
Univ. de Costa Rica, San Pedro de Montes de Oca (Costa Rica)
Institut fur Theoretische Physik der Univ., Heidelberg (Germany)
Ecole Polytechnique, CNRS, Univ. Paris-Saclay, Palaiseau (France)

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. A specific 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 π , ρ , K , K* and Φ meson families as well as to the N , Δ, Λ, Σ, Σ* , Ξ and Ξ* in the baryon sector. Here, 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.

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Research Organization:: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP)

Grant/Contract Number:: AC02-76SF00515

OSTI ID:: 1249395

Report Number(s):: SLAC-PUB-16504; PII: S0370269316302155; TRN: US1601640

Journal Information:: Physics Letters. B, Vol. 759, Issue C; ISSN 0370-2693

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 48 works

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