2018/09/30 by Hugues Beauchesne, Enrico Bertuzzo, Giovanni Grilli di Cortona · 2 citations
Computer Science · Physics and Astronomy · #Collider #Computational Physics and Python Applications #Dark Matter and Cosmic Phenomena #Dark matter #Fermion #Hidden sector #Meson #Parameter space #Particle physics theoretical and experimental studies #Scalar (mathematics) #Weakly interacting massive particles #hep-ph
paper · pdf · doi:10.1007/jhep04(2019)118
published as JHEP 1904 (2019) 118 · 22 pages, 8 figures, matches published version
openalex created_date 2018/10/05 · openalex publication_date 2019/04/01 · arxiv created 2019/05/06 · arxiv updated 2019/05/07 · openalex updated_date 2026/08/05
A bstract It is a distinct possibility that a Hidden Valley sector would have a spectrum of light particles consisting of both stable and unstable dark mesons. The simultaneous presence of these two types of particles can lead to novel mechanisms for generating the correct dark matter relic abundance, which in turn can reflect themselves into new exotic signatures at colliders. We study the viability of such sectors for various Hidden Valley models and map the valid parameter space to possible collider signatures. Mediators studied include various scalar bifundamentals and a heavy Z ′. It is shown that in general bounds from direct and indirect detection can easily be avoided. In most of the allowed parameter space, the relic density is determined by stable mesons annihilating to unstable ones which in turn decay quickly to Standard Model particles. Dark mesons that decay mainly to heavier Standard Model fermions allow for more valid parameter space, though dark mesons are still allowed to decay exclusively to some of the lighter fermions. Possible exotic collider signatures include displaced vertices, emerging jets and semivisible jets.