Learning from radiation at a very high energy lepton collider

• Published in: The journal of high energy physics Vol. 2022; no. 5; pp. 180 - 58
• Main Authors: Chen, Siyu, Glioti, Alfredo, Rattazzi, Riccardo, Ricci, Lorenzo, Wulzer, Andrea
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 27.05.2022; Springer Nature B.V; SpringerOpen
• Subjects: Bosons; Classical and Quantum Gravitation; Electroweak Precision Physics; Elementary Particles; Emission analysis; Fermions; Field theory; High energy physics; Leptons; Physics; Physics and Astronomy; Quantum Field Theories; Quantum Field Theory; Quantum Physics; Radiation; Radiation effects; Regular Article - Theoretical Physics; Relativity Theory; Resummation; Sensitivity enhancement; SMEFT; Specific BSM Phenomenology; String Theory; Electroweak Precision Physics; Specific BSM Phenomenology; SMEFT; Resummation
• ISSN: 1029-8479; 1029-8479
• DOI: 10.1007/JHEP05(2022)180

A bstract We study the potential of lepton collisions with about 10 TeV center of mass energy to probe Electroweak, Higgs and Top short-distance physics at the 100 TeV scale, pointing out the interplay with the long-distance (100 GeV) phenomenon of Electroweak radiation. On one hand, we find that sufficiently accurate theoretical predictions require the resummed inclusion of radiation effects, which we perform at the double logarithmic order. On the other hand, we notice that short-distance physics does influence the emission of Electroweak radiation. Therefore the investigation of the radiation pattern can enhance the sensitivity to new short-distance physical laws. We illustrate these aspects by studying Effective Field Theory contact interactions in di-fermion and di-boson production, and comparing cross-section measurements that require or that exclude the emission of massive Electroweak bosons. The combination of the two types of measurements is found to enhance the sensitivity to the new interactions. Based on these results, we perform sensitivity projections to Higgs and Top Compositeness and to minimal Z ′ new physics scenarios at future muon colliders.