2013/11/30 by Ulrich Haisch, Anthony Hibbs, Emanuele Re +1
Physics and Astronomy · #Astrophysics #Cosmology #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark energy #Dark matter #Jet (fluid) #Large Hadron Collider #Light dark matter #Nuclear physics #Observable #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum mechanics #Scalar field dark matter #Standard Model (mathematical formulation) #hep-ex #hep-ph
paper · pdf · doi:10.1103/physrevd.89.034009
published as Phys. Rev. D 89, 034009 (2014) · 8 pages, 5 figures; v2: discussion of signal and background cross sections added, labelling of plots improved, typos fixed and references updated; matches version published in PRD
arxiv created 2014/01/17 · openalex publication_date 2014/02/06 · arxiv updated 2014/02/12 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The latest LHC monojet searches place stringent bounds on the pp\ensuremath→\ensuremathχ\ensuremathχ cross section of dark matter. Further properties such as the dark matter mass or the precise structure of the interactions between dark matter and the standard model, however, cannot be determined in this manner. We point out that measurements of the azimuthal angle correlations between the two jets in 2j+\ensuremathχ\ensuremathχ events may be used to disentangle whether dark matter pair production proceeds dominantly through tree or loop diagrams. Our general observation is illustrated by considering theories in which dark matter interacts predominantly with the top quark. We show explicitly that in this case the jet-jet azimuthal angle difference is a gold-plated observable to probe the Lorentz structure of the couplings of dark matter to top quarks, thus testing the CP nature of the particle mediating these interactions.