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Singlets in gauge theories with fundamental matter
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Ho Hsiao ,
Jong-Wan Lee ,
Biagio Lucini ,
Axel Maas ,
Maurizio Piai ,
Fabian Zierler ,
Fabian Zierler
Physical Review D, Volume: 109, Issue: 3
Swansea University Authors:
Ed Bennett , Biagio Lucini , Maurizio Piai , Fabian Zierler
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DOI (Published version): 10.1103/physrevd.109.034504
Abstract
We provide the first determination of the mass of the lightest flavor-singlet pseudoscalar and scalar bound states (mesons), in the Sp(4) Yang-Mills theory coupled to two flavors of fundamental fermions, using lattice methods. This theory has applications both to composite Higgs and strongly interac...
| Published in: | Physical Review D |
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| ISSN: | 2470-0010 2470-0029 |
| Published: |
American Physical Society (APS)
2024
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| Online Access: |
Check full text
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa65228 |
| Abstract: |
We provide the first determination of the mass of the lightest flavor-singlet pseudoscalar and scalar bound states (mesons), in the Sp(4) Yang-Mills theory coupled to two flavors of fundamental fermions, using lattice methods. This theory has applications both to composite Higgs and strongly interacting dark matter scenarios. We find the singlets to have masses comparable to those of the light flavored states, which might have important implications for phenomenological models. We focus on regions of parameter space corresponding to a moderately heavy mass regime for the fermions. We compare the spectra we computed to existing and new results for SU(2) and SU(3) theories, uncovering an intriguing degree of commonality. As a by-product, in order to perform the aforementioned measurements, we implemented and tested, in the context of symplectic lattice gauge theories, several strategies for the treatment of disconnected-diagram contributions to two point correlation functions. These technical advances set the stage for future studies of the singlet sector in broader portions of parameter space of this and other lattice theories with a symplectic gauge group. |
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| College: |
Faculty of Science and Engineering |
| Funders: |
UKRI Science and Technology Facilities Council (STFC), Austrian Science Fund, ExaTEPP project, National Research Foundation of Korea (NRF) grant, IBS |
| Issue: |
3 |