Electron and muon magnetic moments and implications for dark matter and model characterisation in non-universal U(1)′ supersymmetric models

Frank, Mariana; Hiçyılmaz, Yaşar; Mondal, Subhadeep; Özdal, Özer; Ün, Cem Salih

doi:10.1007/jhep10(2021)063

Cited by 29 publications

(7 citation statements)

References 119 publications

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“…[32] for a review of SUSY (and non-SUSY) models addressing this anomaly, and refs. [33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49][50] for recent SUSY models that appeared after the Fermilab g − 2 measurement [30]. Combined with a suitable flavor-safe SUSY breaking mechanism, weak scale slepton exchange provides a simple way of getting an enhanced BSM muon g − 2 contribution, while not conflicting with flavor/CP constraints.…”

Section: Introductionmentioning

confidence: 99%

Sleptonic SUSY: From UV Framework to IR Phenomenology

Agashe,

Ekhterachian,

Liu

et al. 2022

Preprint

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We study an attractive scenario, "Sleptonic SUSY", which reconciles the 125 GeV Higgs scalar and the non-observation of superpartners thus far with potentially pivotal roles for slepton phenomenology: providing viable ongoing targets for LHC discovery, incorporating a co-annihilation partner for detectable thermal relic dark matter, and capable of mediating the existing muon g −2 anomaly. This is accomplished by a modestly hierarchical spectrum, with sub-TeV sleptons and electroweakinos and with multi-TeV masses for the other new states. We study new elements in the UV MSSM realization of Sleptonic SUSY based on higher-dimensional sequestering and the synergy between the resulting gauginomediation, hypercharge D-term mediation and Higgs-mediation of SUSY-breaking, so as to more fully capture the range of possibilities. This framework stands out by harmoniously solving the flavor, CP and µ − Bµ problems of the supersymmetric paradigm. We discuss its extension to orbifold GUTs, including gauge-coupling and b-tau unification. We also develop a non-minimal model with extra Higgs fields, in which the electroweak vacuum is more readily cosmologically stable against decay to a charge-breaking vacuum, allowing a broader range of sleptonic spectra than in the MSSM alone. We survey the rich set of signals possible at the LHC and future colliders, covering both R-parity conservation and violation, as well as for dark matter detection. While the multi-TeV squarks imply a Little Hierarchy Problem, intriguingly, small changes in parameter space to improve naturalness result in dramatic phase transitions to either electroweak-preservation or charge-breaking. In a Multiverse setting, the modest unnaturalness may then be explained by the "principle of living dangerously".

show abstract

Section: Introductionmentioning

confidence: 99%

Sleptonic SUSY: From UV Framework to IR Phenomenology

Agashe,

Ekhterachian,

Liu

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…[31] for a review of SUSY (and non-SUSY) models addressing this anomaly, and refs. [32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49] for recent SUSY models that appeared after the Fermilab g−2 measurement [29]. Combined with a suitable flavor-safe SUSY breaking mechanism, weak scale slepton exchange provides a simple way of getting an enhanced BSM muon g − 2 contribution, while not conflicting with flavor/CP constraints.…”

Section: Jhep09(2022)142 1 Introductionmentioning

confidence: 99%

Sleptonic SUSY: from UV framework to IR phenomenology

Agashe

Ekhterachian

Liu

et al. 2022

J. High Energ. Phys.

View full text Add to dashboard Cite

We study an attractive scenario, “Sleptonic SUSY”, which reconciles the 125 GeV Higgs scalar and the non-observation of superpartners thus far with potentially pivotal roles for slepton phenomenology: providing viable ongoing targets for LHC discovery, incorporating a co-annihilation partner for detectable thermal relic dark matter, and capable of mediating the potential muon g − 2 anomaly. This is accomplished by a modestly hierarchical spectrum, with sub-TeV sleptons and electroweakinos and with multi-TeV masses for the other new states. We study new elements in the UV MSSM realization of Sleptonic SUSY based on higher-dimensional sequestering and the synergy between the resulting gaugino-mediation, hypercharge D-term mediation and Higgs-mediation of SUSY-breaking, so as to more fully capture the range of possibilities. This framework stands out by harmoniously solving the flavor, CP and μ − Bμ problems of the supersymmetric paradigm. We discuss its extension to orbifold GUTs, including gauge-coupling and b-tau unification. We also develop a non-minimal model with extra Higgs fields, in which the electroweak vacuum is more readily cosmologically stable against decay to a charge-breaking vacuum, allowing a broader range of sleptonic spectra than in the MSSM alone. We survey the rich set of signals possible at the LHC and future colliders, covering both R-parity conservation and violation, as well as for dark matter detection. While the multi-TeV squarks imply a Little Hierarchy Problem, intriguingly, small changes in parameter space to improve naturalness result in dramatic phase transitions to either electroweak-preservation or charge-breaking. In a Multiverse setting, the modest unnaturalness may then be explained by the “principle of living dangerously”.

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“…This new world average points to a 4.2σ deviation from the SM predictions [3][4][5]. The supersymmetric contributions to muon g − 2 arise from a number of super partners which couple to muon at tree-level [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. In order to solve this discrepancy, the SUSY electroweak sector should involve relatively light neutralinos, charginos and sleptons.…”

Section: Introductionmentioning

confidence: 99%

Muon g-2, Neutralino Dark Matter and Stau NLSP

Gomez,

Shafi,

Tiwari

et al. 2022

Preprint

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We explore the implications of resolving the muon g−2 anomaly in a SU (4) c ×SU (2) L × SU (2) R model, where the soft supersymmetry breaking scalar and gaugino masses break the left-right (LR) symmetry. A 2 σ resolution of the anomaly requires relatively light sleptons, chargino and LSP neutralino. The stau turns out to be the NLSP of mass m τ 400 GeV, and the sleptons from the first two families can be as heavy as about 800 GeV. The chargino is also required to be lighter than about 600 GeV to accommodate the muon g−2 solutions consistent with the dark matter relic density constraint. The dominant right-handed nature of the light slepton states suppress the sensitivity of possible signals which can be probed in Run3 experiments at the LHC. We also discuss the impact of accomodating the Higgs boson mass and the vacuum stability of the scalar potential for these solutions. The Higgsinos are heavier than about 4 TeV, and the LSP neutralino has the correct relic density if it is Bino-like. We identify stau-neutralino coannihilation as the dominant mechanism for realizing the desired dark matter relic density, with sneutrinoneutralino coannihiliation playing a minor role. These bino-like dark matter solutions can yield a spin-independent scattering cross-section on the order of 10 −3 pb which hopefully, can be expected to be tested in the near future.

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Electron and muon magnetic moments and implications for dark matter and model characterisation in non-universal U(1)′ supersymmetric models

Cited by 29 publications

References 119 publications

Sleptonic SUSY: From UV Framework to IR Phenomenology

Sleptonic SUSY: From UV Framework to IR Phenomenology

Sleptonic SUSY: from UV framework to IR phenomenology

Muon g-2, Neutralino Dark Matter and Stau NLSP

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