4 research outputs found
Physics with e+ e- linear colliders
We describe the physics potential of linear colliders in this
report. These machines are planned to operate in the first phase at a center-of
--mass energy of 500 GeV, before being scaled up to about 1 TeV. In the second
phase of the operation, a final energy of about 2 TeV is expected. The machines
will allow us to perform precision tests of the heavy particles in the Standard
Model, the top quark and the electroweak bosons. They are ideal facilities for
exploring the properties of Higgs particles, in particular in the intermediate
mass range. New vector bosons and novel matter particles in extended gauge
theories can be searched for and studied thoroughly. The machines provide
unique opportunities for the discovery of particles in supersymmetric
extensions of the Standard Model, the spectrum of Higgs particles, the
supersymmetric partners of the electroweak gauge and Higgs bosons, and of the
matter particles. High precision analyses of their properties and interactions
will allow for extrapolations to energy scales close to the Planck scale where
gravity becomes significant. In alternative scenarios, like compositeness
models, novel matter particles and interactions can be discovered and
investigated in the energy range above the existing colliders up to the TeV
scale. Whatever scenario is realized in Nature, the discovery potential of
linear colliders and the high-precision with which the properties of
particles and their interactions can be analysed, define an exciting physics
programme complementary to hadron machines.Comment: 103 pages, Late
TF07 Snowmass Report: Theory of Collider Phenomena
11+11 pages, 343 contributors, 1 key formula; contribution to Snowmass 2021, draft report of the Theory Frontier topical group for Collider Phenomenology (TF07), comments and suggestions welcome ; v2: updated contributor listTheoretical research has long played an essential role in interpreting data from high-energy particle colliders and motivating new accelerators to advance the energy and precision frontiers. Collider phenomenology is an essential interface between theoretical models and experimental observations, since theoretical studies inspire experimental analyses while experimental results sharpen theoretical ideas. This report -- from the Snowmass 2021 Theory Frontier topical group for Collider Phenomenology (TF07) -- showcases the dynamism, engagement, and motivations of collider phenomenologists by exposing selected exciting new directions and establishing key connections between cutting-edge theoretical advances and current and future experimental opportunities. By investing in collider phenomenology, the high-energy physics community can help ensure that theoretical advances are translated into concrete tools that enable and enhance current and future experiments, and in turn, experimental results feed into a more complete theoretical understanding and motivate new questions and explorations