Abstract
We present sensitivity of LHC differential cross-section measurements to so-called ``stealth dark matter'' scenarios occurring in an $\mathrm{SU}({N}_{D})$ dark gauge group, where constituents are charged under the Standard Model and ${N}_{D}=2$ or 4. The low-energy theory contains mesons which can be produced at the LHC, and a scalar baryon dark matter (DM) candidate which cannot. We evaluate the impact of LHC measurements on the dark meson masses. Using existing lattice results, we then connect the LHC explorations to DM phenomenology, in particular considering direct-detection experiments. We show that current LHC measurements constrain DM masses in the region of 3.0--5.5 TeV. We discuss potential pathways to explore these models further at the LHC.
Highlights
Strongly-interacting theories featuring new non-Abelian gauge groups, where confinement in a “dark sector” (DS) at some confinement scale Λ leads to stable composite states, offer an interesting alternative explanation of Dark Matter (DM)
The dark matter candidates can be dark pions, baryons or glueballs depending on the exact setup
Such theories can be realized in a variety of non-Abelian gauge groups and can even help explain observed discrepancies between observation and simulations at cosmic scales via so-called DM self-interactions [1,2,3,4,5,6,7,8]
Summary
Strongly-interacting theories featuring new non-Abelian gauge groups, where confinement in a “dark sector” (DS) at some confinement scale Λ leads to stable composite states, offer an interesting alternative explanation of Dark Matter (DM). Once a non-Abelian gauge group with fixed number of flavors and colors is chosen, together with a fermionic representation and a SM–DS mediation mechanism, theoretical predictions for the mass spectra of bound states are obtained by means of lattice simulations These simulations can predict several useful quantities for a phenomenological analysis in three different regimes; (i) the chiral regime where dark quarks can be assumed massless mqD ≪ Λ, (ii) the comparable scales regime mqD ∼ Λ, and (iii) the heavy quark/quarkonia regime mqD ≫ Λ. V we translate these constraints into constraints on the DM candidate and discuss the impact on DM phenomenology more generally, before concluding
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