Stealth dark matter spectrum using Laplacian Heaviside smearing and irreducible representations


Brower, RC, Culver, C, Cushman, KK, Fleming, GT, Hasenfratz, A, Howarth, D, Ingoldby, J, Jin, XY, Kribs, GD, Meyer, AS et al (show 10 more authors) (2024) Stealth dark matter spectrum using Laplacian Heaviside smearing and irreducible representations PHYSICAL REVIEW D, 110 (9). 095001-. ISSN 2470-0010, 2470-0029

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Abstract

We present nonperturbative lattice calculations in the quenched approximation of the low-lying meson and baryon spectrum of the SU(4) gauge theory with fundamental fermion constituents. This theory is one instance of stealth dark matter, a class of strongly coupled theories, where the lowest mass stable baryon is the dark matter candidate. This work constitutes the first milestone in the program to study stealth dark matter self-interactions. Here, we focus on reducing excited state contamination in the single-baryon channel by applying the Laplacian Heaviside method, as well as projecting our baryon operators onto the irreducible representations of the octahedral group. We compare our resulting spectrum to previous work involving Gaussian smeared nonprojected operators and find good agreement with reduced statistical uncertainties. We also present the spectrum of the low-lying odd-parity baryons for the first time.

Item Type: Article
Uncontrolled Keywords: 5106 Nuclear and Plasma Physics, 5107 Particle and High Energy Physics, 4902 Mathematical Physics, 49 Mathematical Sciences, 51 Physical Sciences
Divisions: Faculty of Science & Engineering
Faculty of Science & Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 18 Nov 2024 08:30
Last Modified: 16 Jun 2026 17:10
DOI: 10.1103/PhysRevD.110.095001
Open Access URL: https://doi.org/10.1103/PhysRevD.110.095001
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3188050
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