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• W3199526921 abstract "A bstract The Fermilab Muon g − 2 experiment recently reported its first measurement of the anomalous magnetic moment $$ {a}_{mu}^{mathrm{FNAL}} $$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:msubsup> <mml:mi>a</mml:mi> <mml:mi>μ</mml:mi> <mml:mtext>FNAL</mml:mtext> </mml:msubsup> </mml:math> , which is in full agreement with the previous BNL measurement and pushes the world average deviation $$ Delta {a}_{mu}^{2021} $$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:mtext>∆</mml:mtext> <mml:msubsup> <mml:mi>a</mml:mi> <mml:mi>μ</mml:mi> <mml:mn>2021</mml:mn> </mml:msubsup> </mml:math> from the Standard Model to a significance of 4 . 2 σ . Here we provide an extensive survey of its impact on beyond the Standard Model physics. We use state-of-the-art calculations and a sophisticated set of tools to make predictions for a μ , dark matter and LHC searches in a wide range of simple models with up to three new fields, that represent some of the few ways that large ∆ a μ can be explained. In addition for the particularly well motivated Minimal Supersymmetric Standard Model, we exhaustively cover the scenarios where large ∆ a μ can be explained while simultaneously satisfying all relevant data from other experiments. Generally, the a μ result can only be explained by rather small masses and/or large couplings and enhanced chirality flips, which can lead to conflicts with limits from LHC and dark matter experiments. Our results show that the new measurement excludes a large number of models and provides crucial constraints on others. Two-Higgs doublet and leptoquark models provide viable explanations of a μ only in specific versions and in specific parameter ranges. Among all models with up to three fields, only models with chirality enhancements can accommodate a μ and dark matter simultaneously. The MSSM can simultaneously explain a μ and dark matter for Bino-like LSP in several coannihilation regions. Allowing under abundance of the dark matter relic density, the Higgsino- and particularly Wino-like LSP scenarios become promising explanations of the a μ result." @default.
• W3199526921 created "2021-09-27" @default.
• W3199526921 creator A5051838821 @default.
• W3199526921 creator A5060842815 @default.
• W3199526921 creator A5064343490 @default.
• W3199526921 creator A5064500476 @default.
• W3199526921 creator A5075009432 @default.
• W3199526921 creator A5091350479 @default.
• W3199526921 date "2021-09-14" @default.
• W3199526921 modified "2023-09-30" @default.
• W3199526921 title "New physics explanations of aμ in light of the FNAL muon g − 2 measurement" @default.
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