GUT-constrained supersymmetry and dark matter in light of the new (g − 2)μ determination

Abstract

The recent confirmation by the Fermilab-based Muon g-2 experiment of the (g − 2)μ anomaly has important implications for allowed particle spectra in softly broken supersymmetry (SUSY) models with neutralino dark matter (DM). Generally, the DM has to be quite light, with the mass up to a few hundred GeV, and bino-dominated if it is to provide most of DM in the Universe. Otherwise, a higgsino or wino dominated DM is also allowed but only as a strongly subdominant component of at most a few percent of the total density. These general patterns can easily be found in the phenomenological models of SUSY but in GUT-constrained scenarios this proves much more challenging. In this paper we revisit the issue in the framework of some unified SUSY models with different GUT boundary conditions on the soft masses. We study the so-called non-universal gaugino model (NUGM) in which the mass of the gluino is disunified from those of the bino and the wino and an SO(10) and an SU(5) GUT-inspired models as examples. We find that in these unified frameworks the above two general patterns of DM can also be found, and thus the muon anomaly can also be accommodated, unlike in the simplest frameworks of the CMSSM or the NUHM. We show the resulting values of direct detection cross-section for points that do and do not satisfy the muon anomaly. On the other hand, it will be challenging to access those solutions at the LHC because the resulting spectra are generally very compressed.

The new $(g-2)_μ$ and Right-Handed Sneutrino Dark Matter

“…One of the most interesting features of the model is that the lightest neutralino, when it is the lightest supersymmetric particle (LSP), can explain the DM abundance in the Universe that we have measured with experiments like Planck [8]. In addition, it has been shown to be able to explain the most recent estimation of the (g − 2) µ anomaly [9][10][11][12][13][14]. This is shared with the minimal extension of the MSSM, called the next-to-minimal supersymmetric standard model (NMSSM) 2 which includes in its formulation a singlet superfield to solve dynamically the µ-problem of the MSSM.…”

Explaining (g − 2)μ with multi-TeV sleptons

“…This is confirmed by our numerical results in figure 2 (see the blue and purple shaded regions). The fact that an explanation of (g − 2) µ prefers a light spectrum of sleptons and electroweakinos has been re-emphasized recently in several studies of the MSSM [74][75][76][77][78][79][80][81][82][83][84][85][86][87][88] and of MSSM extensions [89,90]. It is possible to accommodate the preferred value for ∆a µ for a somewhat heavier spectrum (m SUSY 1 TeV) in corners of parameter space with JHEP07(2021)118 either a very large µ term [75,77,85] or with very large values of tan β.…”

Gluino-SUGRA scenarios in light of FNAL muon g – 2 anomaly

“…Since the new result by the Fermilab has come out, the SUSY interpretation for muon g − 2 anomaly have been discussed in many works . Generally speaking, it is not easy to explain the muon g − 2 anomaly in SUGRA-type models [70][71][72] (unlike the MSSM which can readily give sufficient contributions to the muon g − 2 [67,[73][74][75][76][77]). Large SUSY contributions to ∆a µ in general require light sleptons and light electroweakinos [73,74].…”