2004/12/17 by Matteo Beccaria, M. Beccaria, S. Bentvelsen +3 · 14 citations
Physics and Astronomy · #Asymmetry #Electroweak interaction #High-Energy Particle Collisions Research #Invariant (physics) #Invariant mass #Large Hadron Collider #Logarithm #Mathematical physics #Pair production #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Sigma #Supersymmetry #Top quark #hep-ph
paper · pdf · doi:10.1103/physrevd.71.073003
published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 71(7) (American Physical Society) · 23 pages, 9 eps figures
arxiv created 2004/12/17 · openalex publication_date 2005/04/12 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We consider the top-anti-top invariant mass distributions for production of unpolarized and polarized top quark pairs at LHC, in the theoretical framework of the MSSM. Assuming a ``moderately'' light SUSY scenario, we derive the leading logarithmic electroweak contributions at one loop in a region of large invariant mass, M_tt\ensuremath≃1 TeV, for the unpolarized differential cross section d\ensuremathσ/dM_tt and for the differential longitudinal top polarization asymmetry At(M_tt). We perform a realistic evaluation of the expected uncertainties of the two quantities, both from a theoretical and from an experimental point of view, and discuss the possibility of obtaining, from accurate measurements of the two mass distributions, stringent consistency tests of the model, in particular identifications of large tan\ensuremathβ effects.