TY - EJOUR
AU - Bagnaschi, E.
AU - Chakraborti, M.
AU - Heinemeyer, S.
AU - Saha, I.
AU - Weiglein, G.
TI - Interdependence of the new 'MUON G-2' Result and the W-Boson Mass
IS - DESY-22-041
M1 - PUBDB-2022-01418
M1 - DESY-22-041
M1 - arXiv:2203.15710
M1 - CERN-TH-2022-034
M1 - IFT-UAM/CSIC-22-029
PY - 2022
N1 - 26 pages, 7 figures
AB - The electroweak (EW) sector of the Minimal Supersymmetric extension of the Standard Model (MSSM), assuming the lightest neutralino as Dark Matter (DM) candidate, can account for a variety of experimental results. In particular it can account for the discrepancy between the experimental result for the anomalous magnetic moment of the muon, (g−2)<sub>μ</sub>, and its Standard Model (SM) prediction. The new 'MUON G-2' result, combined with the older BNL result on (g−2)<sub>μ</sub>, yields a deviation from the SM prediction of ∆a<sub>μ</sub> = (25.1 ±5.9) ×10<sup>−10</sup>, corresponding to 4.2 σ. Using this updated bound, together with the other constraints, we calculate the MSSM prediction for the mass of the W boson, M<sub>W</sub>. We assume contributions only from the EW sector, with the colored sector of the MSSM taken to be heavy. We investigate five scenarios, distinguished by the mechanisms which yield a relic DM density in agreement with the latest Planck bounds. We find that with the new (g−2)<sub>μ</sub> result taken into account and depending on the scenario, values up to M<sub>W</sub><sup>MSSM</sup> <~80.376 GeV are reached. The largest values are obtained for wino DM and in the case of slepton co-annihilation, where points well within the 1 σ range of the experimental world average of M<sub>W</sub><sup>exp</sup> = 80.379 ± 0.012 GeV are reached, whereas the SM predicts a too small value of M<sub>W</sub><sup>SM</sup> = 80.353 GeV. We analyze the dependence of M<sub>W</sub><sup>MSSM</sup> on the relevant masses of the EW superpartners and demonstrate that future M<sub>W</sub> measurements, e.g. at the ILC, could distinguish between various MSSM realizations. Sizable contributions to M<sub>W</sub><sup>MSSM</sup> are associated with a relatively light ~χ<sup>0</sup><sub>1</sub>, accompanied by either a light chargino or a light smuon, setting interesting targets for future collider searches.
KW - muon, magnetic moment (INSPIRE)
KW - dark matter, density (INSPIRE)
KW - minimal supersymmetric standard model (INSPIRE)
KW - GeV (INSPIRE)
KW - experimental results (INSPIRE)
KW - sparticle (INSPIRE)
KW - neutralino (INSPIRE)
KW - slepton (INSPIRE)
KW - electroweak interaction (INSPIRE)
KW - Planck (INSPIRE)
KW - ILC Coll (INSPIRE)
KW - chargino (INSPIRE)
KW - smuon (INSPIRE)
KW - Brookhaven Lab (INSPIRE)
LB - PUB:(DE-HGF)25
DO - DOI:10.3204/PUBDB-2022-01418
UR - https://bib-pubdb1.desy.de/record/475674
ER -