Loops and trees in generic EFTs
Abstract
We consider aspects of tree and one-loop behavior in a generic 4d EFT of massless scalars, fermions, and vectors, with a particular eye to the high-energy limit of the Standard Model EFT at operator dimensions 6 and 8. First, we classify the possible Lorentz structures of operators and the subset of these that can arise at tree-level in a weakly coupled UV completion, extending the tree/loop classification through dimension 8 using functional methods. Second, we investigate how operators contribute to tree and one-loop helicity amplitudes, exploring the impact of non-renormalization theorems through dimension 8. We further observe that many dimension 6 contributions to helicity amplitudes, including rational parts, vanish exactly at one-loop level. This suggests the impact of helicity selection rules extends beyond one loop in non-supersymmetric EFTs.
- Authors:
-
- Univ. of California, Santa Barbara, CA (United States)
- Chinese Academy of Sciences (CAS), Beijing (China); Univ. of California, Santa Barbara, CA (United States)
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Hong Kong Univ. of Science and Technology, Hong Kong Special Administrative Region (China)
- Univ. of California, Santa Barbara, CA (United States); Istituto Nazionale di Fisica Nucleare (INFN) di Trieste (Italy)
- Publication Date:
- Research Org.:
- Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP); National Natural Science Foundation of China (NSFC); European Union (EU); Kavli Institute for Theoretical Physics; National Science Foundation (NSF)
- OSTI Identifier:
- 1592139
- Report Number(s):
- arXiv:2001.00017; FERMILAB-PUB-19-646-T
Journal ID: ISSN 1029-8479; oai:inspirehep.net:1773816; TRN: US2101849
- Grant/Contract Number:
- AC02-07CH11359; SC0014129; 11761141011; NSF PHY-1748958
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of High Energy Physics (Online)
- Additional Journal Information:
- Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2020; Journal Issue: 8; Journal ID: ISSN 1029-8479
- Publisher:
- Springer Berlin
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Beyond Standard Model; Effective Field Theories; Scattering Amplitudes
Citation Formats
Craig, Nathaniel, Jiang, Minyuan, Li, Ying-Ying, and Sutherland, Dave. Loops and trees in generic EFTs. United States: N. p., 2020.
Web. doi:10.1007/jhep08(2020)086.
Craig, Nathaniel, Jiang, Minyuan, Li, Ying-Ying, & Sutherland, Dave. Loops and trees in generic EFTs. United States. https://doi.org/10.1007/jhep08(2020)086
Craig, Nathaniel, Jiang, Minyuan, Li, Ying-Ying, and Sutherland, Dave. Wed .
"Loops and trees in generic EFTs". United States. https://doi.org/10.1007/jhep08(2020)086. https://www.osti.gov/servlets/purl/1592139.
@article{osti_1592139,
title = {Loops and trees in generic EFTs},
author = {Craig, Nathaniel and Jiang, Minyuan and Li, Ying-Ying and Sutherland, Dave},
abstractNote = {We consider aspects of tree and one-loop behavior in a generic 4d EFT of massless scalars, fermions, and vectors, with a particular eye to the high-energy limit of the Standard Model EFT at operator dimensions 6 and 8. First, we classify the possible Lorentz structures of operators and the subset of these that can arise at tree-level in a weakly coupled UV completion, extending the tree/loop classification through dimension 8 using functional methods. Second, we investigate how operators contribute to tree and one-loop helicity amplitudes, exploring the impact of non-renormalization theorems through dimension 8. We further observe that many dimension 6 contributions to helicity amplitudes, including rational parts, vanish exactly at one-loop level. This suggests the impact of helicity selection rules extends beyond one loop in non-supersymmetric EFTs.},
doi = {10.1007/jhep08(2020)086},
journal = {Journal of High Energy Physics (Online)},
number = 8,
volume = 2020,
place = {United States},
year = {Wed Aug 19 00:00:00 EDT 2020},
month = {Wed Aug 19 00:00:00 EDT 2020}
}
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