Muon g − 2 vs LHC Run 2 in supersymmetric models

Endo, Motoi; Hamaguchi, Koichi; Iwamoto, Sho; Kitahara, Teppei

doi:10.1007/jhep04(2020)165

Cited by 39 publications

(62 citation statements)

References 82 publications

(151 reference statements)

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“…This makes the new physics possibly required by the (g − 2) µ anomaly an ideal target for direct searches at LHC experiments, which in fact have already reached the sensitivity so to exclude substantial portions of the parameter space of typical models [15][16][17][18][19][20].…”

Section: Jhep06(2020)087mentioning

confidence: 99%

Muon and electron g − 2 and lepton masses in flavor models

Calibbi

López-Ibáñez

Melis

et al. 2020

J. High Energ. Phys.

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The stringent experimental bound on µ → eγ is compatible with a simultaneous and sizable new physics contribution to the electron and muon anomalous magnetic moments (g − 2) (= e, µ), only if we assume a non-trivial flavor structure of the dipole operator coefficients. We propose a mechanism in which the realization of the (g − 2) correction is manifestly related to the mass generation through a flavor symmetry. A radiative flavon correction to the fermion mass gives a contribution to the anomalous magnetic moment. In this framework, we introduce a chiral enhancement from a non-trivial O(1) quartic coupling of the scalar potential. We show that the muon and electron anomalies can be simultaneously explained in a vast region of the parameter space with predicted vector-like mediators of masses as large as M χ ∈ [0.6, 2.5] TeV.

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Section: Jhep06(2020)087mentioning

confidence: 99%

Muon and electron g − 2 and lepton masses in flavor models

Calibbi

López-Ibáñez

Melis

et al. 2020

J. High Energ. Phys.

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show abstract

“…In the latter the relevant LHC searches have been applied without a proper re-casting. All Run II data, again without proper re-casting, but with DM data, was taken into account in [30], favoring models with relatively heavy sleptons. Run II data for chargino/neutralino searches with some DM implications has also been presented in [31,32].…”

Section: Introductionmentioning

confidence: 99%

Improved $$(g-2)_\mu $$ measurements and supersymmetry

2020

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The electroweak (EW) sector of the Minimal Supersymmetric Standard Model (MSSM) can account for variety of experimental data. The lighest supersymmetric particle (LSP), which we take as the lightest neutralino, $${\tilde{\chi }}_{1}^0$$ χ ~ 1 0 , can account for the observed Dark Matter (DM) content of the universe via coannihilation with the next-to-LSP (NLSP), while being in agreement with negative results from Direct Detection (DD) experiments. Owing to relatively small production cross-sections a comparably light EW sector of the MSSM is also in agreement with the unsuccessful searches at the LHC. Most importantly, the EW sector of the MSSM can account for the persistent $$3-4\,\sigma $$ 3 - 4 σ discrepancy between the experimental result for the anomalous magnetic moment of the muon, $$(g-2)_\mu $$ ( g - 2 ) μ , and its Standard Model (SM) prediction. Under the assumption that the $${\tilde{\chi }}_{1}^0$$ χ ~ 1 0 provides the full DM relic abundance we first analyze which mass ranges of neutralinos, charginos and scalar leptons are in agreement with all experimental data, including relevant LHC searches. We find an upper limit of $$\sim 600 \,\, \mathrm {GeV}$$ ∼ 600 GeV for the LSP and NLSP masses. In a second step we assume that the new result of the Run 1 of the “MUON G-2” collaboration at Fermilab yields a precision comparable to the existing experimental result with the same central value. We analyze the potential impact of the combination of the Run 1 data with the existing $$(g-2)_\mu $$ ( g - 2 ) μ data on the allowed MSSM parameter space. We find that in this case the upper limits on the LSP and NLSP masses are substantially reduced by roughly $$100 \,\, \mathrm {GeV}$$ 100 GeV . This would yield improved upper limits on these masses of $$\sim 500 \,\, \mathrm {GeV}$$ ∼ 500 GeV . In this way, a clear target could be set for future LHC EW searches, as well as for future high-energy $$e^+e^-$$ e + e - colliders, such as the ILC or CLIC.

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“…A recent revisit study shows that the latest LHC constraints disfavor the MSSM parameter space smuons are lighter than charginos. So the MSSM explanation of Δa μ indicates that mμ ≥ m˜χAE 1 [50]. Accordingly, the two-loop contribution of a SUSY μ is often taken into consideration to relax the parameter space to some extent.…”

Section: Introductionmentioning

confidence: 99%

Anomalous muon magnetic moment in the inverse seesaw extended next-to-minimal supersymmetric standard model

et al. 2020

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The present work investigates the possibility that both dark matter and the anomalous magnetic moment of the muon may be explained within the context of the inverse seesaw extended next-to-minimal supersymmetric Standard Model (ISS-NMSSM). In ISS-NMSSM, the newly introduced Higgs-neutrino Yukawa coupling Y ν provides additional Higgsino-sneutrino loop contribution to ðg − 2Þ μ. If the deviation between the experimental observations and the Standard Model predictions of the anomalous muon magnetic moment is confirmed by the further experimental and theoretical studies, it can be explained naturally within the ISS-NMSSM framework without conflicting with the current stringent limits on the direct detection of dark matter and Large Hadron Collider searches.

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Muon g − 2 vs LHC Run 2 in supersymmetric models

Cited by 39 publications

References 82 publications

Muon and electron g − 2 and lepton masses in flavor models

Muon and electron g − 2 and lepton masses in flavor models

Improved $$(g-2)_\mu $$ measurements and supersymmetry

Anomalous muon magnetic moment in the inverse seesaw extended next-to-minimal supersymmetric standard model

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