2017/04/30 by Christoph Englert, Michael Russell · 2 citations
Physics and Astronomy · #Benchmark (surveying) #Collider #Degeneracy (biology) #Electroweak interaction #Electroweak scale #Gauge (firearms) #High-Energy Particle Collisions Research #Large Hadron Collider #Lepton #Nuclear physics #Observable #Parameter space #Particle Detector Development and Performance #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics beyond the Standard Model #Production (economics) #Quark #Standard Model (mathematical formulation) #Top quark #hep-ph
paper · pdf · doi:10.1140/epjc/s10052-017-5095-z
v1: 11 pages, 11 figures. v2: References added, Fig. 11 updated. Matches version published in EPJC
openalex publication_date 2017/08/01 · arxiv created 2017/10/25 · arxiv updated 2017/10/26 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We perform a comparative study of the reach of future e+e- collider options for the scale of non-resonant new physics effects in the top quark sector, phrased in the language of higher-dimensional operators. Our focus is on the electroweak top quark pair production process e+e- → Z^*/γ → tt , and we study benchmark scenarios at the ILC and CLIC. We find that both are able to constrain mass scales up to the few \text TeV range in the most sensitive cases, improving by orders of magnitude on the forecast capabilities of the LHC. We discuss the role played by observables such as forward–backward asymmetries, and making use of different beam polarisation settings, and highlight the possibility of lifting a degeneracy in the allowed parameter space by combining top observables with precision Z-pole measurements from LEP1.