EFT diagrammatica: UV roots of the CP-conserving SMEFT

Bakshi, Supratim Das; Chakrabortty, Joydeep; Prakash, Suraj; Rahaman, Shakeel Ur; Spannowsky, Michael

Abstract

The Standard Model Effective Field Theory (SMEFT) is an established theoretical framework that parametrises the impact a UV theory has on low-energy observables. Such parametrization is achieved by studying the interactions of SM fields encapsulated within higher mass dimensional (≥ 5) operators. Through judicious employment of the tools of EFTs, SMEFT has become a source of new predictions as well as a platform for conducting a coherent comparison of new physics (beyond Standard Model) scenarios. We, for the first time, are proposing a diagrammatic approach to establish selection criteria for the allowed heavy field representations corresponding to each SMEFT operator. We have elucidated the links of a chain connecting specific CP conserving dimension-6 SMEFT operators with unique sets of heavy field representations. The contact interactions representing each effective operator have been unfolded into tree- and (or) one-loop-level diagrams to reveal unique embeddings of heavy fields within them. For each case, the renormalizable vertices of a UV model serve as the building blocks for all possible unfolded diagrams. Based on this, we have laid the groundwork to construct observable-driven new physics models. This in turn also prevents us from making redundant analyses of similar models. While we have taken a predominantly minimalistic approach, we have also highlighted the necessity for non-minimal interactions for certain operators.

Citation

Bakshi, S. D., Chakrabortty, J., Prakash, S., Rahaman, S. U., & Spannowsky, M. (2021). EFT diagrammatica: UV roots of the CP-conserving SMEFT. Journal of High Energy Physics, 2021(6), Article 33. https://doi.org/10.1007/jhep06%282021%29033

• Journal Article Type: Article
• Acceptance Date: May 21, 2021
• Online Publication Date: Jun 4, 2021
• Publication Date: 2021-06
• Deposit Date: Aug 5, 2021
• Publicly Available Date: Aug 5, 2021
• Journal: Journal of High Energy Physics
• Print ISSN: 1126-6708
• Electronic ISSN: 1029-8479
• Publisher: Scuola Internazionale Superiore di Studi Avanzati (SISSA)
• Peer Reviewed: Peer Reviewed
• Volume: 2021
• Issue: 6
• Article Number: 33
• DOI: https://doi.org/10.1007/jhep06%282021%29033
• Public URL: https://durham-repository.worktribe.com/output/1243433