Electroweak oblique corrections and light pseudoGoldstone bosons in technicolor
Sean Fleming, Ivan Maksymyk · arXiv (Cornell University) · 1995
The STU formalism, which parametrizes oblique electroweak corrections due to heavy new physics, has recently been extended to the case of light new physics. In principle, this extended formalism, which involves the six parameters STUVWX, must be used if loop contributions to the oblique corrections entail light new particles with masses in the range \\sim\\!\\Mz or less. Using an effective lagrangian approach, we present here a thorough introductory discussion of the STUVWX formalism, elucidating subtleties such as the connection between S-X and the star formalism of Kennedy and Lynn, and the loss of definite symmetry properties which S and U undergo as the STU parameter set is extended to the case of light new physics. Finally, we discuss the phenomenology of one-family Technicolor, as an application of the parameters S-X.