2006/08/31 by Matthew Baumgart, Thomas Hartman, Can Kilic +1 · 1 citation
Computer Science · Physics and Astronomy · #Computational Physics and Python Applications #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1088/1126-6708/2007/11/084
published as JHEP0711:084,2007 · 20 pages, 15 figures; v2 references added and minor changes
arxiv created 2007/11/27 · openalex publication_date 2007/11/27 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/01
Extensions of the MSSM could significantly alter its phenomenology at the LHC. We study the case in which the MSSM is extended by an additional U(1) gauge symmetry, which is spontaneously broken at a few TeV. The production cross-section of sleptons is enhanced over that of the MSSM by the process pp→ Z' → ℓ ℓ^*, so the discovery potential for sleptons is greatly increased. The flavor and charge information in the resulting decay, ℓ → ℓ + LSP, provides a useful handle on the identity of the LSP. With the help of the additional kinematical constraint of an on-shell Z', we implement a novel method to measure all of the superpartner masses involved in this channel. For certain final states with two invisible particles, one can construct kinematic observables bounded above by parent particle masses. We demonstrate how output from one such observable, mT2, can become input to a second, increasing the number of measurements one can make with a single decay chain. The method presented here represents a new class of observables which could have a much wider range of applicability.