Contrasting the anomalous and the SM-MSSM couplings at the Colliders†
نویسنده
چکیده
This talk consists of two parts. In the first, the present experimental bounds on the anomalous couplings of the gauge bosons, based mainly on the LEP and Tevatron experiments, are reviewed. In the second part, the theorem of helicity conservation (HC) is presented, which should be valid in either the Standard Model (SM) or MSSM, for any two-body process at high energies and fixed angles. The energy-range for the HC validity is discussed and, under certain conditions, it should well be within the LHC or ILC range. Since all known anomalous couplings violate HC, its testing may provide a way for generically identifying the possible presence of anomalous (non-renormalizable) contributions. PRESENTED at the 2005 Photon Linear Collider Workshop (PLC2005) Kazimierz, Poland, 5-8 September, 2005. Partially supported by the Greek Ministry of Education and Religion and the EPEAK program Pythagoras
منابع مشابه
MSSM Higgs Physics at Higher Orders
Various aspects of the Higgs boson phenomenology of the Minimal Supersymmetric Standard Model (MSSM) are reviewed. Emphasis is put on the effects of higher-order corrections. The masses and couplings are discussed in the MSSM with real and complex parameters. Higherorder corrections to Higgs boson production channels at a prospective e+e− linear collider are investigated. Corrections to Higgs b...
متن کاملAnomalous Top Quark Couplings at the Future Linear Colliders ∗
In terms of an effective Lagrangian we investigate the possibilities of probing anomalous top quark couplings, t ¯ tH, γt ¯ t, Zt ¯ t and tW b at the future linear colliders. It is found that at a linear collider with a c. m. energy √ s ∼ 0.5 − 1.5 TeV and a high luminosity of 10 − 1000 fb −1 , e + e − → t ¯ tH is an ideal process in probing anomalous t ¯ tH couplings. We also study in detail t...
متن کاملHiggs Searches at Future Colliders : Potentials for Discovery and Diagnosis ∗
The prospects for Higgs boson discovery and study at present and future colliders are reviewed, with emphasis on the Minimal Supersymmetric Standard Model (MSSM) states. The expected experimental coverages with different production and decay modes are outlined. Particular attention is given to the Higgs couplings predicted when the top quark Yukawa coupling has an infrared fixed point. Characte...
متن کاملHIGGS RADIATION OFF QUARKS IN SUPERSYMMETRIC THEORIES AT ee COLLIDERS
Yukawa couplings between Higgs bosons and quarks in supersymmetric theories can be measured in the processes ee → QQ̄ + Higgs. We have determined the cross sections of these processes in the minimal supersymmetric model including the complete set of next-to-leading order QCD corrections for all channels. Supported by the EU FF Programme under contract FMRX-CT98-0194 (DG 12 MIHT). Heisenberg-Fell...
متن کاملAnomalous gauge couplings of the Higgs boson at high energy photon colliders
beyond the standard model (SM) and SM backgrounds are carefully studied. We propose certain kinematic cuts to suppress the standard model backgrounds. For an integrated luminosity of 1 ab, we show that (a) γγ → ZZ can provide a test of gHγγ to the 3σ sensitivity of O(10 − 10) TeV at a 500 GeV ILC, and O(10) TeV at a 1 TeV ILC and a 3 TeV CLIC, and (b) γγ → WWWW at a 3 TeV CLIC can test all the ...
متن کامل