Upalaparna Banerjee
Integrating out heavy scalars with modified equations of motion: Matching computation of dimension-eight SMEFT coefficients
Banerjee, Upalaparna; Chakrabortty, Joydeep; Englert, Christoph; Rahaman, Shakeel Ur; Spannowsky, Michael
Authors
Joydeep Chakrabortty
Christoph Englert
Shakeel Ur Rahaman
Professor Michael Spannowsky michael.spannowsky@durham.ac.uk
Director
Abstract
The shift in focus towards searches for physics beyond the Standard Model employing model-independent effective field theory methods necessitates a rigorous approach to matching to guarantee the validity of the obtained results and constraints. The limits on the leading dimension-six effective field theory effects can be rather inaccurate for LHC searches that suffer from large uncertainties while exploring an extensive energy range. Similarly, precise measurements can, in principle, test the subleading effects of the operator expansion. In this work, we present an algorithmic approach to automatize matching computations for dimension-eight operators for generic scalar extensions with proper implementation of equations of motion. We devise a step-by-step procedure to obtain the dimension-eight Wilson coefficients in a nonredundant basis to arrive at complete matching results. We apply this formalism to a range of scalar extensions of the Standard Model and provide tree-level and loop-suppressed results. Finally, we discuss the relevance of the dimension-eight operators for a range of phenomenological analyses, particularly focusing on Higgs and electroweak physics.
Citation
Banerjee, U., Chakrabortty, J., Englert, C., Rahaman, S. U., & Spannowsky, M. (2023). Integrating out heavy scalars with modified equations of motion: Matching computation of dimension-eight SMEFT coefficients. Physical Review D, 107(5), Article 055007. https://doi.org/10.1103/physrevd.107.055007
Journal Article Type | Article |
---|---|
Acceptance Date | Jan 24, 2023 |
Online Publication Date | Mar 9, 2023 |
Publication Date | 2023 |
Deposit Date | Jul 18, 2023 |
Publicly Available Date | Jul 19, 2023 |
Journal | Physical Review D |
Print ISSN | 2470-0010 |
Electronic ISSN | 2470-0029 |
Publisher | American Physical Society |
Peer Reviewed | Peer Reviewed |
Volume | 107 |
Issue | 5 |
Article Number | 055007 |
DOI | https://doi.org/10.1103/physrevd.107.055007 |
Public URL | https://durham-repository.worktribe.com/output/1168602 |
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Copyright Statement
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
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