Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2000-05-03
Phys.Lett. B486 (2000) 125-133
Physics
High Energy Physics
High Energy Physics - Phenomenology
14 pages, 4 figures. Minor changes, version to appear in Phys. Lett. B
Scientific paper
10.1016/S0370-2693(00)00749-8
By running the prospective high-energy e^+ e^- collider TESLA in the GigaZ mode on the Z resonance, experiments can be performed on the basis of more than 10^9 Z events. They will allow the measurement of the effective electroweak mixing angle to an accuracy of approximately +- 10^-5. Likewise the W boson mass is expected to be measurable with an error of about 6 MeV near the W^+ W^- threshold. In this note, we study the accuracy with which the Higgs boson mass can be determined from loop corrections to these observables in the Standard Model. The comparison with a directly observed Higgs boson may be used to constrain new physics scales affecting the virtual loops. We also study constraints on the heavy Higgs particles predicted in the Minimal Supersymmetric Standard Model, which are very difficult to observe directly for large masses. Similarly, it is possible to constrain the mass of the heavy scalar top particle.
Erler Jens
Heinemeyer Sven
Hollik Wolfgang
Weiglein Georg
Zerwas Peter M.
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