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EWPD in the SMEFT to dimension eight

Corbett, Tyler and Helset, Andreas and Martin, Adam and Trott, Michael (2021) EWPD in the SMEFT to dimension eight. Journal of High Energy Physics, 2021 (6). Art. No. 76. ISSN 1126-6708. doi:10.1007/JHEP06(2021)076.

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We calculate the O(⟨H†H⟩²/Λ⁴) corrections to LEP electroweak precision data using the geometric formulation of the Standard Model Effective Field Theory (SMEFT). We report our results in simple-to-use interpolation tables that allow the interpretation of this data set to dimension eight for the first time. We demonstrate the impact of these previously unknown terms in the case of a general analysis in the SMEFT, and also in the cases of two distinct models matched to dimension eight. Neglecting such dimension-eight corrections to LEP observables introduces a theoretical error in SMEFT studies. We report some preliminary studies defining such a theory error, explicitly demonstrating the effect of previously unknown dimension-eight SMEFT corrections on LEP observables.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Helset, Andreas0000-0002-5904-3748
Additional Information:© 2021 The Authors. This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited. Received 24 February 2021; Revised 26 May 2021; Accepted 30 May 2021; Published 11 June 2021. We thank Chris Hays for insightful discussions. M.T. acknowledges support from the Villum Fund, project number 00010102. T.C. acknowledges funding from European Union’s Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement No. 890787. The work of A.M. is partially supported by the National Science Foundation under Grant No. Phy-1230860. A.H. is supported by the U.S. Department of Energy (DOE) under Award Number DE-SC0011632 and by the Walter Burke Institute for Theoretical Physics.
Group:Walter Burke Institute for Theoretical Physics
Funding AgencyGrant Number
Villum Foundation00010102
Marie Curie Fellowship890787
Department of Energy (DOE)DE-SC0011632
Walter Burke Institute for Theoretical Physics, CaltechUNSPECIFIED
Subject Keywords:Beyond Standard Model, Effective Field Theories
Issue or Number:6
Record Number:CaltechAUTHORS:20210623-140038262
Persistent URL:
Official Citation:Corbett, T., Helset, A., Martin, A. et al. EWPD in the SMEFT to dimension eight. J. High Energ. Phys. 2021, 76 (2021).
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:109543
Deposited By: Tony Diaz
Deposited On:23 Jun 2021 18:39
Last Modified:23 Jun 2021 18:39

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