Testing electroweak SUSY for muon g − 2 and dark matter at the LHC and beyond

Abdughani, Murat; Hikasa, K.; Wu, Lei; Yang, Jin Min; Zhao, Jun

doi:10.1007/jhep11(2019)095

“…LHC Run II data, the (then) current bound from (g−2) μ as well as DM constraints were analyzed in several benchmark planes in [26][27][28] and in two benchmark scenarios w.r.t. the DM relic abundance in [29]. In the latter the relevant LHC searches have been applied without a proper re-casting.…”

Section: Introductionmentioning

confidence: 99%

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

Chakraborti

¹

,

Heinemeyer

²

,

Saha

³

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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“…For instance, unification in the down sector as in the classical Georgi-Jarslkog scheme demands |y τ /y b | GUT = 1 and |y µ /y s | GUT = k GJ = 3. However, nowadays, these relations are no longer favoured phenomenologically [73][74][75][76] but the updated range 11) obtained in [75]. This is the reason we take to generalize our k GJ factor to k GJ = B−L+κT 3 .…”

Section: Supersymmetric Type-i Seesawmentioning

confidence: 99%

“…remains an interesting motivation to explore new models [9][10][11][12][13][14], for a review see [15]. 1 With respect to neutrino masses, the type-I seesaw mechanism [19][20][21][22][23][24] seems to be the most natural extension of the SM to generate them.…”

Section: Introductionmentioning

confidence: 99%

LFV and (g-2) in non-universal SUSY models with light higgsinos

Han¹,

López-Ibáñez

²

,

Melis

³

et al. 2020

J. High Energ. Phys.

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We consider a supersymmetric type-I seesaw framework with non-universal scalar masses at the GUT scale to explain the long-standing discrepancy of the anomalous magnetic moment of the muon. We find that it is difficult to accommodate the muon g-2 while keeping charged-lepton flavor violating processes under control for the conventional SO(10)-based relation between the up sector and neutrino sector. However, such tension can be relaxed by adding a Georgi-Jarlskog factor for the Yukawa matrices, which requires a non-trivial GUT-based model. In this model, we find that both observables are compatible for small mixings, CKM-like, in the neutrino Dirac Yukawa matrix.

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“…3 In all the aforementioned models, flavor violation is suppressed, cosmology is consistent, and the predicted SM Higgs boson mass can easily match the measured one. (See also other early SUSY models explaining the g − 2 [31][32][33][34][35][36])…”

Section: Jhep06(2021)029mentioning

confidence: 99%

Muon g − 2 anomaly in anomaly mediation

Yin

¹

2021

J. High Energ. Phys.

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The long-standing muon g − 2 anomaly has been confirmed recently at the Fermilab. The combined discrepancy from Fermilab and Brookhaven results shows a difference from the theory at a significance of 4.2 σ. In addition, the LHC has updated the lower mass bound of a pure wino. In this letter, we study to what extent the g − 2 can be explained in anomaly mediation scenarios, where the pure wino is the dominant dark matter component. To this end, we derive some model-independent constraints on the particle spectra and g − 2. We find that the g − 2 explanation at the 1σ level is driven into a corner if the higgsino threshold correction is suppressed. On the contrary, if the threshold correction is sizable, the g − 2 can be explained. In the whole viable parameter region, the gluino mass is at most 2 − 4 TeV, the bino mass is at most 2 TeV, and the wino dark matter mass is at most 1 − 2 TeV. If the muon g − 2 anomaly is explained in the anomaly mediation scenarios, colliders and indirect search for the dark matter may find further pieces of evidence in the near future. Possible UV models for the large threshold corrections are discussed.

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Testing electroweak SUSY for muon g − 2 and dark matter at the LHC and beyond

Cited by 64 publications

References 114 publications

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

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

LFV and (g-2) in non-universal SUSY models with light higgsinos

Muon g − 2 anomaly in anomaly mediation

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