2017/10/25 by Howard Baer, V. Barger, Vernon Barger +4 · 23 citations
Physics and Astronomy · #Astrophysics #Black Holes and Theoretical Physics #Dark Matter and Cosmic Phenomena #Gaugino #Gluino #Higgs boson #Large Hadron Collider #Luminosity #Naturalness #Nuclear physics #Pair production #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics beyond the Standard Model #Production (economics) #Sign (mathematics) #Supersymmetry #Tevatron #hep-ph
paper · pdf · doi:10.1103/physrevd.97.035012
published in Physical review. D/Physical review. D. 97(3) (American Physical Society) · 26 pages, 9 figures consisting of 13 image files
arxiv created 2017/10/25 · openalex publication_date 2018/02/23 · arxiv updated 2018/02/28 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
Naturalness arguments applied to simple supersymmetric (SUSY) theories require a set of light higgsinos with mass \ensuremath∼|\ensuremathμ| not too far from mh. These models have an inverted electroweakino spectrum with |\ensuremathμ|\ensuremath≪M2 which leads to a rather clean, hadronically quiet, same-sign diboson (SSdB) signature at hadron colliders arising from neutral-plus-charged wino pair production. We improve and expand our earlier studies of this signature for discovering SUSY in natural SUSY models by (i) including backgrounds which were not previously considered and which turn out to be significant, (ii) devising more efficient cuts to successfully contend with these larger backgrounds and determining the discovery reach and exclusion ranges for winos with these cuts, emphasizing projections for the updated integrated luminosity target for HL-LHC of 3 ab^\ensuremath-1, and (iii) emphasizing the utility of this channel for natural models without gaugino mass unification. We display the kinematic characteristics of the relatively jet-free same sign dilepton+)ET events (from leptonic decays of both Ws) and find that these are only weakly sensitive to the parent wino mass. We also examine the charge asymmetry in these events and show that its measurement can be used to check the consistency of the wino origin of the signal. Finally, we show that---because the wino branching fractions in natural SUSY are essentially independent of details of the underlying model---a determination of the rate for clean, same-sign dilepton events yields a better than 10% determination of the wino mass over the entire mass range where experiments at the HL-LHC can discover the wino signal.