Dark Matter in the Standard Model Extension with Singlet Quark

Abstract

We analyze the possibility of hadron Dark Matter carriers consisting of singlet quark and the light standard one. It is shown that stable singlet quarks generate effects of new physics which do not contradict to restrictions from precision electroweak data. The neutral and charged pseudoscalar low-lying states are interpreted as the Dark Matter particle and its mass-degenerated partner. We evaluated their masses and lifetime of the charged component, and describe the potential asymptotes of low-energy interactions of these particles with nucleons and with each other. Some peculiarities of Sommerfeld enhancement effect in the annihilation process are also discussed.

Hadronic and Hadron-Like Physics of Dark Matter

“…The majority of restrictions refer to the mass of the new hadrons or available mass/cross section parameters space [40][41][42][43][44][45][46][47][48]. As a rule, the low limits on the mass value do not exceed 1-2 TeV which are an order of magnitude less then our previous estimations of DM particle mass [29] (see also the estimations in this work). Here, we should pick out the results of research in [46,47], where it was reported that the mass of new hadrons M 10 2 TeV.…”

New Physics of Strong Interaction and Dark Universe

“…Some scenarios of DM with strongly interacting massive particles (SIMP) are presented in Refs. [10,[12][13][14][15]. As was noted in the introduction, usually strongly self-interacting dark matter scenarios are realized by introducing extra groups of gauge symmetry and additional sets of fields.…”

Hadronic Dark Matter

“…First of all, we consider the experimental electro-weak (EW) restrictions on new heavy quarks. As was shown in [19], new quarks in the scenario with singlet quark and mirror *…”

“…Here, we consider the second and third variant of hadronic DM. It was shown in the works [19,20], that the scenario of hadronic DM does not contradict to the electro-weak restrictions on new physics and the experimental data on abundence of anomalous elements now. Strong QCD-type interaction of new quark Q with ordinary one leads to the forming of coupled states -two-quark (meson) and three-quark (baryon) heavy hadrons.…”

“…The DM particle M, in this case, consists of new heavy quark Q and standard light quark q, that is M = (qQ), where Q possess standard strong interactions. The most developed variants of new heavy quark origin are the following: 4-th generation of heavy fermions [6]- [10], mirror or chiral-symmetric models [11,12] and the extensions of Standard Model (SM) with singlet quark [13]- [19]. Here, we consider the second and third variant of hadronic DM.…”