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High Energy Physics - Lattice

arXiv:2604.04433 (hep-lat)
[Submitted on 6 Apr 2026]

Title:Lattice studies of chimera baryons in Sp(4) gauge theory

Authors:Jong-Wan Lee, Ed Bennett, Luigi Del Debbio, Niccolò Forzano, Ryan C. Hill, Deog Ki Hong, Ho Hsiao, C.-J. David Lin, Biagio Lucini, Alessandro Lupo, Maurizio Piai, Davide Vadacchino, Fabian Zierler
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Abstract:We study chimera baryons, fermion bound states composed of two (hyper)quarks transforming in the fundamental and one in the antisymmetric representation of a non-Abelian gauge group. While in QCD they coincide with ordinary baryons, in composite Higgs models (CHMs) with top partial compositeness, spin-1/2 chimera baryons serve as partners of the top quark and are responsible for its large mass. We perform non-perturbative lattice calculations of the low-lying spectrum of the chimera baryons, in a specific realization of CHMs based on a Sp(4) gauge theory. In the quenched approximation, we present the numerical results in the continuum and massless limits. Then, for dynamical fermions, we measure the spectrum and matrix elements by employing a newly developed spectral density analysis for several choices of the lattice parameters.
Comments: 4 pages, 4 figures, Proceedings of the 2025 International Conference on the Structure of Baryons (Baryons 2025), 10-14 Nov. 2025, Jeju, South Korea
Subjects: High Energy Physics - Lattice (hep-lat); High Energy Physics - Phenomenology (hep-ph); Nuclear Theory (nucl-th)
Report number: CTPU-PTC-26-12, TUM-EFT 211/26
Cite as: arXiv:2604.04433 [hep-lat]
  (or arXiv:2604.04433v1 [hep-lat] for this version)
  https://doi.org/10.48550/arXiv.2604.04433

Submission history

From: Jong-Wan Lee [view email]
[v1] Mon, 6 Apr 2026 05:28:13 UTC (1,219 KB)
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