2012/09/19 by Ezequiel Álvarez, Ezequiel Alvarez, Estefania Coluccio Leskow · 2 citations
Mathematics · Physics and Astronomy · #Asymmetry #Charge (physics) #Computer science #Data mining #High-Energy Particle Collisions Research #Large Hadron Collider #Mathematics #Null (SQL) #Observable #Parameter space #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics beyond the Standard Model #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Statistics #Tevatron #hep-ex #hep-ph
paper · pdf · doi:10.1103/physrevd.86.114034
25 pages, 4 figures
arxiv created 2012/09/19 · openalex publication_date 2012/12/21 · arxiv updated 2013/05/29 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We propose a charged, electrically neutral, and flavor-changing Z^\ensuremath' model to conciliate the apparent disagreement between the important excess found in the tt Tevatron forward-backward asymmetry and the null---compatible with negative---results found in the LHC charge asymmetry. We show that this model contributes positively to the forward-backward asymmetry, whereas naturally a new cancellation is turned on at the LHC, yielding a null, or even negative, charge asymmetry. We find the region in parameter space that is simultaneously allowed by the stringent Tevatron and LHC observables. We show that the model is safe to atomic parity violation constraints and propose a possible increase in the Z^\ensuremath' width to avoid restrictions coming from tj/tj resonance searches and ttj cross section. We evaluate the constraints to the model, as well as distinctive features in the forecoming experimental results.