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The SMEFT formalism: the basis for finding deviations from the Standard Model


Lomonosov Moscow State University, Skobeltsyn Institute of Nuclear Physics, Leninskie Gory 1 build. 2, Moscow, 119991, Russian Federation

The search for manifestations of physics beyond the Standard Model (SM) is one of the main directions of research at the LHC and future colliders under discussion. The effects caused by the new physics can consist in the direct detection of new particles if their masses are less than the characteristic energies available at colliders and their interactions with the SM particles are strong enough. But if the masses of new particles are too large, or the interactions with SM particles are too weak, then new particles cannot be detected directly. In this case, the new physics can lead to a modification of the interactions of SM particles, to subthreshold effects. We present„ the current status of an approach or formalism called the Standard Model Effective Field Theory (SMEFT), which allows„ us to describe and model deviations from the SM predictions in a theoretically consistent manner. The advantages of and serious problems with this approach are discussed.

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Fulltext is also available at DOI: 10.3367/UFNe.2021.02.038916
Keywords: Standard Model, effective field theory, top quark, Higgs boson, higher-dimensional operators, unitarity, renormalizability
PACS: 12.15.−y, 12.60.−i, 14.80.Bn (all)
DOI: 10.3367/UFNe.2021.02.038916
URL: https://ufn.ru/en/articles/2022/7/b/
001100230300002
2-s2.0-85148267039
2022PhyU...65..653B
Citation: Boos E E "The SMEFT formalism: the basis for finding deviations from the Standard Model" Phys. Usp. 65 653–676 (2022)
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Received: 21st, December 2020, revised: 18th, January 2021, 12th, February 2021

Îðèãèíàë: Áîîñ Ý Ý «Ôîðìàëèçì SMEFT — îñíîâà ïîèñêà îòêëîíåíèé îò Ñòàíäàðòíîé ìîäåëè» ÓÔÍ 192 697–721 (2022); DOI: 10.3367/UFNr.2021.02.038916

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