2017/03/15 by Rakhi Mahbubani, Pedro Schwaller, José Zurita +1 · 1 citation
Physics and Astronomy · #Aerospace engineering #Collider #Dark Matter and Cosmic Phenomena #Higgsino #Large Hadron Collider #Minimal Supersymmetric Standard Model #Nuclear physics #Particle Detector Development and Performance #Particle physics #Particle physics theoretical and experimental studies #Physics #Range (aeronautics) #Sensitivity (control systems) #Standard Model (mathematical formulation) #Thermal #hep-ph
paper · pdf · doi:10.1007/jhep06(2017)119
20 pages, 11 figures
arxiv created 2017/03/15 · openalex publication_date 2017/06/01 · openalex created_date 2017/06/30 · arxiv updated 2017/08/02 · openalex updated_date 2026/08/05
We investigate the sensitivity at current and future hadron colliders to a heavy electrically-charged particle with a proper decay length below a centimetre, whose decay products are invisible due to below-threshold energies and/or small couplings to the Standard Model. A cosmologically-motivated example of a framework that contains such a particle is the Minimal Supersymmetric Standard Model in the limit of pure Higgsinos. The current hadron-collider search strategy has no sensitivity to the upper range of pure-Higgsino masses that are consistent with the thermal relic density, even at a future collider with 100 TeV centre-of-mass energy. We show that performing a disappearing track search within the inner 10 cm of detector volume would improve the reach in lifetime by a factor of 3 at the 14 TeV LHC and a further factor of 5 at a 100 TeV collider, resulting in around 10 events for 1.1 TeV thermal Higgsinos. In order to include the particles with the largest boost in the analysis, we furthermore propose a purely track-based search in both the central and forward regions, each of which would increase the number of events by another factor of 5, improving our reach at small lifetimes. This would allow us to definitively discover or exclude the experimentally-elusive pure-Higgsino thermal relic at a 100 TeV collider. Our results illustrate the importance of varying detector design when assessing the reach of future high energy colliders.