New Physics of Strong Interaction and Dark Universe

Abstract

The history of dark universe physics can be traced from processes in the very early universe to the modern dominance of dark matter and energy. Here, we review the possible nontrivial role of strong interactions in cosmological effects of new physics. In the case of ordinary QCD interaction, the existence of new stable colored particles such as new stable quarks leads to new exotic forms of matter, some of which can be candidates for dark matter. New QCD-like strong interactions lead to new stable composite candidates bound by QCD-like confinement. We put special emphasis on the effects of interaction between new stable hadrons and ordinary matter, formation of anomalous forms of cosmic rays and exotic forms of matter, like stable fractionally charged particles. The possible correlation of these effects with high energy neutrino and cosmic ray signatures opens the way to study new physics of strong interactions by its indirect multi-messenger astrophysical probes.

Collider constraints on dark mediators

“…In this work, we answer these questions for scenarios where a t-channel mediator communicates between the standard model (SM) and a QCD-like dark sector. This complements and extends similar studies for minimal dark sectors [1][2][3], as well as searches for complex dark sectors coupled via s-channel mediators [4][5][6][7][8][9][10][11][12][13][14].…”

General freeze-in and freeze-out

“…This automatically leads to accidental DM candidates [20] where DM cosmological stability follows automatically from the structure of theory. See [21] and [22] for reviews on dark sectors with strong interactions.…”

Multimessenger Probes for New Physics in Light of A. Sakharov’s Legacy in Cosmoparticle Physics

“…Stable integer-positive charged particles bind with electrons to form anomalous isotopes, whose abundance is restricted by the observational data, especially for anomalous hydrogen formed by particles with a charge +1. Negatively charged particles with a charge −(2n − 1) can bind with n nuclei of primordial helium, as soon as it is formed in the Big Bang Nucleosynthesis (BBN) (see [40] for recent review and references). Therefore, only negatively charged stable particles with charge −2n can avoid immediate contradiction with the observational constraints, being bound with n nuclei of primordial helium in dark atoms of dark matter.…”