Minimal spin-one isotriplet dark matter

Abstract

In this work we present a simple extension of the Standard Model that contains, as the only new physics component, a massive spin-one matter field in the adjoint representation of SU (2) L . In order to be consistent with perturbative unitarity, the vector field must be odd under a Z 2 symmetry. Radiative corrections make the neutral component of the triplet (V 0 ) slightly lighter than the charged ones. We show that V 0 can be the dark matter particle while satisfying all current bounds if it has a mass between 2.8 and 3.8 TeV. We present the current limit on the model parameter space from highly complementary experimental constraints including dark matter relic density measurement, dark matter direct and indirect detection searches, LHC data on Higgs couplings to photons and LHC data on disappearing track searches. We also show that the two-dimensional parameter space can be fully covered by disappearing track searches at a future 100 TeV hadron collider, which will probe, in particular, the whole mass range relevant for dark matter, thus giving an opportunity to discover or exclude the model. * a.belyaev@soton.ac.uk

Lepton collider indirect signatures of dark CP-violation

“…The scalar sector of the IDM contains 1 inert doublet, which is Z 2 -odd, does not develop a Vacuum Expectation Value (VEV) and does not couple to fermions, and 1 active Z 2 -even Higgs doublet, which has a non-zero VEV and couples to fermions in the same way as the SM Higgs doublet, hence also referred to as I(1+1)HDM. The IDM, however constrained, is a viable model that can provide a viable DM candidate (see the latest analyses, e.g., in [8,9,10,11]). However, due to the imposed exact Z 2 symmetry, all parameters in the potential are real and there is no room for additional sources of CP-violation.…”

Decoding the Nature of Dark Matter at Current and Future Experiments

“…Production of D + in pairs or in association with DM leads then to the typical signature from charged LLP: disappearing charged track (DCT) as soon as the track from LLP is long enough (from few cm to a meter). In case of such signature the S/B ratio is much higher than in case of mono-jet signal and therefore, substantially bigger DM masses can be probed with charged LLPs from DM sector [34][35][36]. As an example, we would like to present here results for the minimal vector triplet DM (V 0 ) model [36] which predicts the right amount of DM for M DM in the 3-4 TeV range depending on DM coupling to the Higgs boson.…”

“…The mass split, M, between V 0 and V ± is generated radiatively and its value is just above the pion mass which makes V ± long lived. In Figure 6 we present M as a function of M V , which was calculated in Belyaev et al [36].…”

“…(2) L ) and Z 2 symmetry is imposed (which links the quartic V coupling to the gauge coupling constant and makes theory unitary is unitary before EW symmetry breaking and in the absence of the Higgs boson as found in Zerwekh [37]) then Lagrangian can be written as: The solid black line is the one-loop mass splitting, with all higher order terms truncated [36]. [36].…”

Dark matter from a vector field in the fundamental representation ofSU(2)L

“…However, it has been shown that vector bosons may perfectly play the role of dark matter, most of them motivated from hidden gauge sectors [15][16][17][18][19][20][21][22][23][24], extra large dimensions [25], little Higgs model [26] and from a linear sigma model [27]. Recently, the neutral component of an electroweak vector multiplet has been shown to be a good dark matter candidate, such as multiplets transforming in the adjoint representation [28], and in the fundamental one in the context of 331 models [29,30] and in Gauge-Higgs unification framework [31].…”