Stealth dark matter spectrum using Laplacian Heaviside smearing and irreducible representations

Journal Article · 04 November 2024 · Physical Review. D.

DOI: https://doi.org/10.1103/physrevd.110.095001 · OSTI ID:2282435

Brower, R. C. ^[1]; Culver, C. ^[2]; Cushman, K. K.  ^[3]; Fleming, G. T.  ^[4]; Hasenfratz, A. ^[5]; Howarth, D. ^[6]; Ingoldby, J. ^[7]; Jin, X. Y. ^[8]; Kribs, G. D. ^[9]; Meyer, A. S. ^[10]; Neil, E. T. ^[5]; Osborn, J. C. ^[8]; Owen, E. ^[11]; Park, S. ^[12]; Rebbi, C. ^[11]; Rinaldi, E. ^[13]; Schaich, D. ^[2]; Vranas, P. ^[12]; Weinberg, E. ^[14]; Witzel, O. ^[15]

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1. Boston Univ., MA (United States); Lattice Strong Dynamics (LSD) Collaboration. et al.
2. University of Liverpool
3. Yale University
4. Yale University; Fermilab
5. University of Colorado
6. Lawrence Berkeley National Laboratory
7. Abdus Salam International Centre for Theoretical Physics; Durham University
8. Argonne National Laboratory
9. University of Oregon
10. Lawrence Livermore National Laboratory
11. Boston University
12. Lawrence Livermore National Laboratory; Lawrence Berkeley National Laboratory
13. Interdisciplinary Theoretical and Mathematical Sciences Program (iTHEMS)
14. Boston University; NVIDIA Corporation
15. Universität Siegen

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.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL (United States); Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
• Sponsoring Organization: US Department of Energy; USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), High Energy Physics (HEP); USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
• Contributing Organization: Lattice Strong Dynamics (LSD) Collaboration
• Grant/Contract Number: AC02-05CH11231; AC02-06CH11357; AC02-07CH11359; AC05-00OR22725; AC52-07NA27344; SC0010005; SC0011640; SC0015845; SC0019061; SC0019323; SC0020250
• OSTI ID: 2282435
• Report Number(s): FERMILAB-PUB--23-808-T; IPPP/23/71, LLNL-JRNL-858123; LLNL--JRNL-858123; RIKEN-iTHEMS-Report-23; arXiv:2312.07836; oai:inspirehep.net:2736500
• Journal Information: Physical Review. D., Journal Name: Physical Review. D. Journal Issue: 9 Vol. 110; ISSN 2470-0010
• Publisher: American Physical Society (APS)Copyright Statement
• Country of Publication: United States
• Language: English