EFT, decoupling, Higgs boson mixing, and higher dimensional operators

Banerjee, Upalaparna; Chakrabortty, Joydeep; Englert, Christoph; Naskar, Wrishik; Rahaman, Shakeel Ur; Spannowsky, Michael

Abstract

The effective field theory (EFT) framework is a precise approximation procedure when the inherent assumptions of a large-scale separation between the Standard Model (SM) and new interactions alongside perturbativity are realized. Constraints from available data might not automatically guarantee these circumstances when contrasted with UV scenarios that the EFT analysis wishes to inform. From an EFT perspective, achieving sufficient precision in navigating the alignment or decoupling limits beyond the SM scenarios can necessitate moving beyond the SM’s leading, dimension six EFT deformation. Using the example of Higgs boson mixing, we demonstrated the importance of higher-dimensional terms in the EFT expansion. We analyze the relevance of virtual EFT corrections and dimension eight contributions for well-determined electroweak precision observables. We find that when moving away from the decoupling limit, the relevance of additional terms in the EFT expansion quickly becomes relevant. This demonstrates the necessity to move beyond dimension six interactions for any scenario that contains Higgs boson mixing.

Citation

Banerjee, U., Chakrabortty, J., Englert, C., Naskar, W., Rahaman, S. U., & Spannowsky, M. (2024). EFT, decoupling, Higgs boson mixing, and higher dimensional operators. Physical Review D, 109(5), Article 055035. https://doi.org/10.1103/physrevd.109.055035

• Journal Article Type: Article
• Acceptance Date: Feb 22, 2024
• Online Publication Date: Mar 20, 2024
• Publication Date: Apr 1, 2024
• Deposit Date: May 21, 2024
• Publicly Available Date: May 21, 2024
• Journal: Physical Review D
• Print ISSN: 2470-0010
• Electronic ISSN: 2470-0029
• Publisher: American Physical Society
• Peer Reviewed: Peer Reviewed
• Volume: 109
• Issue: 5
• Article Number: 055035
• DOI: https://doi.org/10.1103/physrevd.109.055035
• Public URL: https://durham-repository.worktribe.com/output/2455626