Abstract
One of the specific predictions of a new strongly coupled dynamics at a TeV scale is the existence of stable vector-like technibaryon states so that the lightest neutral one could serve as a Dark Matter candidate. We study the latter hypothesis in the QCD-type technicolor with \(\mathrm{SU}(3)_\mathrm{TC}\) confined group and one \(\mathrm{SU}(2)_\mathrm{W}\) doublet of vector-like techniquarks consistent with electroweak precision constraints and test it against the existing Dark Matter astrophysics data. We discuss the most stringent Dark Matter constraints on weak interactions of technibaryons in \(\mathrm{SU}(3)_\mathrm{TC}\) technicolor and possible implications of these findings for the cosmological evolution of relic technineutrons. We conclude that vector-like techniquark sectors with an odd group of confinement \(\mathrm{SU}(2n+1)_\mathrm{TC}, n=1,2,\ldots \) and with ordinary vector-like weak \(\mathrm{SU}(2)_\mathrm{W}\) interactions are excluded by XENON100 data under the assumption of technibaryon number conservation in the modern Universe allowing for an even technicolor group \(\mathrm{SU}(2n)_\mathrm{TC}\) only.
Highlights
The undoubtful existence of the Dark Matter (DM) comprising about a third of the total mass of the Universe today remains the strongest phenomenological evidence for New Physics beyond the Standard Model (SM) required by astrophysics measurements
We are focused on one of the alternatives to SUSYbased DM candidates predicted by dynamical electroweak symmetry breaking (EWSB) and compositeness scenarios, the lightest heavy neutral technibaryon state N
We have shown that under the natural assumption of T-baryon number conservation, the local chiral symmetry breaking gives rise to the vector SU(2)V gauge symmetry, which acts on constituent T-quark and T-baryon sectors, additional to the SM sectors
Summary
The undoubtful existence of the Dark Matter (DM) comprising about a third (or more precisely, about 27 % [1]) of the total mass of the Universe today remains the strongest phenomenological evidence for New Physics beyond the Standard Model (SM) required by astrophysics measurements. The latter identification at the bound-state level should be understood as a natural phenomenological trick to introduce local weak interactions into the T-hadron spectrum valid in the low-energy effective field theory limit only, and it can be schematically written as SU(2)V≡L+R SU(2)W Such a ‘gauging’ of the vector subgroup SU(2)V≡L+R in the GLσ M sense and its identification with the SM gauge isospin group do not mean that one introduces extra elementary gauge bosons into the existing fundamental theory, e.g. to the SM or its possible high-scale gauge extensions. [34], does not attempt to resolve the naturalness/hierarchy problem of the SM and does not offer a mechanism for the generation of the current T-quark masses It is considered as a low-energy phenomenologically consistent limit of a more general strongly coupled dynamics, which is yet to be constructed (it has the same status as the low-energy effective field theories existing in hadron physics).
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