Physics at the [Formula: see text] linear collider.
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A comprehensive review of physics at an [Formula: see text] linear collider in the energy range of [Formula: see text] GeV-3 TeV is presented in view of recent and expected LHC results, experiments from low-energy as well as astroparticle physics.The report focusses in particular on Higgs-boson, top-quark and electroweak precision physics, but also discusses several models of beyond the standard model physics such as supersymmetry, little Higgs models and extra gauge bosons.The connection to cosmology has been analysed as well.
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Affiliation: II. Institute of Theoretical Physics, University of Hamburg, 22761 Hamburg, Germany ; Deutsches Elektronen Synchrotron (DESY), Hamburg und Zeuthen, 22603 Hamburg, Germany.
ABSTRACT
A comprehensive review of physics at an [Formula: see text] linear collider in the energy range of [Formula: see text] GeV-3 TeV is presented in view of recent and expected LHC results, experiments from low-energy as well as astroparticle physics. The report focusses in particular on Higgs-boson, top-quark and electroweak precision physics, but also discusses several models of beyond the standard model physics such as supersymmetry, little Higgs models and extra gauge bosons. The connection to cosmology has been analysed as well. No MeSH data available. Related in: MedlinePlus |
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Mentions: The cross section normalised to the point particle cross section near threshold [740, 741] can be written at LO as99\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\begin{aligned} R_{t\bar{t}} = \left( \frac{6\pi N_c e_t^2}{m_t^2}\right) \mathrm{Im} \, G_c(\mathbf {0}, \mathbf {0};\,E+i{\varGamma }_t), \end{aligned}$$\end{document}Rtt¯=6πNcet2mt2ImGc(0,0;E+iΓt),where and is the non-relativistic Coulomb Green function. The Green function contains resonances at energies\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\begin{aligned} E_n=-m_t (C_F \alpha _s)^2/(4n^2) \end{aligned}$$\end{document}En=-mt(CFαs)2/(4n2)corresponding to Coulomb boundstates, and its residue is given by the Coulomb wave function :100Thus the peak position and the magnitude of the cross section is determined by the Coulomb energy levels and the wave-functions , respectively. In practice the resonance structure of is smeared due to the large top quark width . In Fig. 101 the threshold cross section is shown for varying the top-quark width. Only the ground-state peak can be seen for 1.0–1.5 GeV as rather wide prominence of the cross section, and the resonance states are completely smeared out creating a flat plateau for . Although the resonant structures are washed out for a large top-quark width, it is still possible to extract top-quark parameters, and also by performing a threshold scan, provided a precise theory prediction for the total cross section is at hand.Fig. 101 |
View Article: PubMed Central - PubMed
Affiliation: II. Institute of Theoretical Physics, University of Hamburg, 22761 Hamburg, Germany ; Deutsches Elektronen Synchrotron (DESY), Hamburg und Zeuthen, 22603 Hamburg, Germany.
A comprehensive review of physics at an [Formula: see text] linear collider in the energy range of [Formula: see text] GeV-3 TeV is presented in view of recent and expected LHC results, experiments from low-energy as well as astroparticle physics. The report focusses in particular on Higgs-boson, top-quark and electroweak precision physics, but also discusses several models of beyond the standard model physics such as supersymmetry, little Higgs models and extra gauge bosons. The connection to cosmology has been analysed as well.
No MeSH data available.