Type-I 2HDM under the Higgs and electroweak precision measurements

Constraints Placed on the Higgs Sector from Precision Electroweak Measurements

In this lecture, I would like to investigate what precision electroweak measurements have to tell us about the Higgs sector. I will show that the radiative corrections to electroweak interaction observables coming from the Higgs sector can be summarized into three parameters S, T, and U. The precision measurements of the observables will constrain S and 2’. By comparing these constraints with t...

Precision Electroweak Parameters and the Higgs Mass

The status of various precisely measured electroweak parameters is reviewed. Natural relations among them are shown to constrain the Higgs mass,mH , via quantum loop effects to relatively low values. A comparison with direct Higgs searches is made. FUNDAMENTAL PARAMETERS AND PRECISION MEASUREMENTS The SU(2)L×U(1)Y electroweak sector of the standard model contains 17 or more fundamental paramete...

Precision Electroweak Measurements

Recent electroweak precision measurements from ee and pp colliders are presented. Some emphasis is placed on the recent developments in the heavy flavor sector. The measurements are compared to predictions from the Standard Model of electroweak interactions. All results are found to be consistent with the Standard Model. The indirect constraint on the top quark mass from all measurements is in ...

Little Higgs and precision electroweak tests

All models containing new physics are highly constrained by the electroweak precision tests. In this note I consider the electroweak precision data constraints on Little Higgs models by using a general method based on the effective Lagrangian approach: one eliminates the heavy fields from the Lagrangian via their classical equations of motion in the limit of infinite mass, which means in practi...

Theory of Precision Electroweak Measurements