Abstract
AbstractThe electroweak (EW) sector of the Minimal Supersymmetric Standard Model (MSSM), with the lightest neutralino as Dark Matter (DM) candidate, can account for a variety of experimental data. This includes the DM content of the universe, DM direct detection limits, EW SUSY searches at the LHC and in particular the so far 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. The recently published “MUON G-2” result is within $${0.8}\,\sigma $$
0.8
σ
in agreement with the older BNL result on $$(g-2)_\mu $$
(
g
-
2
)
μ
. The combination of the two results was given as $$a_\mu ^{\mathrm{exp}} = (11 659 {206.1}\pm {4.1}) \times 10^{-10}$$
a
μ
exp
=
(
11659
206.1
±
4.1
)
×
10
-
10
, yielding a new deviation from the SM prediction of $$\Delta a_\mu = ({25.1}\pm {5.9}) \times 10^{-10}$$
Δ
a
μ
=
(
25.1
±
5.9
)
×
10
-
10
, corresponding to $${4.2}\,\sigma $$
4.2
σ
. Using this improved bound we update the results presented in Chakraborti et al. (Eur Phys J C 80(10):984, 2020) and set new upper limits on the allowed parameters space of the EW sector of the MSSM. We find that with the new $$(g-2)_\mu $$
(
g
-
2
)
μ
result the upper limits on the (next-to-) lightest SUSY particle are in the same ballpark as previously, yielding updated upper limits on these masses of $$\sim 750 \,\, \mathrm {GeV}$$
∼
750
GeV
. In this way, a clear target is confirmed for future (HL-)LHC EW searches, as well as for future high-energy $$e^+e^-$$
e
+
e
-
colliders, such as the ILC or CLIC.
Funder
World Premier International Research Center Initiative (WPI), MEXT, Japan
MEINCOP Spain
European Regional Development Fund
IFT Centro de Excelencia Severo Ochoa
Publisher
Springer Science and Business Media LLC
Subject
Physics and Astronomy (miscellaneous),Engineering (miscellaneous)
Cited by
40 articles.
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