The Electroweak Chiral Lagrangian and New Precision Measurements
نویسنده
چکیده
A revised and complete list of the electroweak chiral lagrangian operators up to dimension-four is provided. The connection of these operators to the S, T and U parameters and the parameters describing the triple gauge boson vertices WWγ and WWZ is made, and the size of these parameters from new heavy physics is estimated using a one flavor-doublet model of heavy fermions. The coefficients of the chiral lagrangian operators are also computed in this model.
منابع مشابه
New Terms for the Compact Form of Electroweak Chiral Lagrangian
The compact form of the electroweak chiral Lagrangian is a reformulation of its original form and is expressed in terms of chiral rotated electroweak gauge fields, which is crucial for relating the information of underlying theories to the coefficients of the lowenergy effective Lagrangian. However the compact form obtained in previous works is not complete. In this letter we add several new ch...
متن کاملThe radiative corrections of the electroweak chiral Lagrangian with renormalization group equations
We show the computational procedure of the renormalization of the electroweak chiral Lagrangian (the 4D Higgsless standard model), and provide one simplified version of its one-loop renormalization group equations, which we demonstrate its simplicity and reliability. By analyzing the solutions of the one-loop renormalization group equations of the electroweak chiral Lagrangian, we study the par...
متن کاملLarge corrections to electroweak parameters in technicolor theories
Precision electroweak measurements are presently providing a sensitive probe for new physics at and above the scale of weak interactions. It has been stressed [ 1 ] that the effects of new heavy particles which do not couple directly to light fermions are manifest almost entirely in correct ions to the vacuum polarization ampli tudes of the electroweak gauge bosons. We find that an effective la...
متن کاملChiral Technicolor and Precision Electroweak Measurements
I consider the possibility that electroweak symmetry is broken by a strongly interacting chiral gauge theory. I argue that some of the discrepancies between precision electroweak measurements and the predictions of QCD-like technicolor models can be resolved if technicolor is a chiral gauge theory. I present a toy technicolor model which demonstrates this idea, and gives mt ≫ mb, with a small v...
متن کاملTests for a Strong Electroweak Sector at Future e+e− High Energy Colliders
The study of the scattering at high energy of the gauge bosons W and Z, in particular longitudinally polarized W and Z, can clarify the mechanism of spontaneous symmetry breaking in the Standard Model of the electroweak interactions. Different models of strong electroweak sector, based on the effective lagrangian approach are briefly reviewed. They include models with no resonance, with scalar ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 1993