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      Supersymmetric Interpretation of the Muon \(g-2\) Anomaly

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          Abstract

          The Fermilab Muon \(g-2\) collaboration recently announced the first result of measurement of the muon anomalous magnetic moment (\(g-2\)), which confirmed the previous result at the Brookhaven National Laboratory and thus the discrepancy with its Standard Model prediction. We revisit low-scale supersymmetric models that are naturally capable to solve the muon \(g-2\) anomaly, focusing on two distinct scenarios: chargino-contribution dominated and pure-bino-contribution dominated scenarios. It is shown that the slepton pair-production searches have excluded broad parameter spaces for both two scenarios, but they are not closed yet. For the chargino-dominated scenario, the models with \(m_{\tilde{\mu}_{\rm L}}\gtrsim m_{\tilde{\chi}^{\pm}_1}\) are still widely allowed. For the bino-dominated scenario, we find that, although slightly non-trivial, the region with low \(\tan \beta\) with heavy higgsinos is preferred. In the case of universal slepton masses, the low mass regions with \(m_{\tilde{\mu}}\lesssim 230\) GeV can explain the \(g-2\) anomaly while satisfying the LHC constraints. Furthermore, we checked that the stau-bino coannihilation works properly to realize the bino thermal relic dark matter. We also investigate heavy staus case for the bino-dominated scenario, where the parameter region that can explain the muon \(g-2\) anomaly is stretched to \(m_{\tilde{\mu}}\lesssim 1.3\) TeV.

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          Author and article information

          Journal
          07 April 2021
          Article
          2104.03217
          b4839006-038c-4491-b645-85be54d54f91

          http://creativecommons.org/licenses/by/4.0/

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          Custom metadata
          26 pages, 4 figures, 2 tables
          hep-ph hep-ex

          High energy & Particle physics
          High energy & Particle physics

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