ar X iv : h ep - p h / 99 04 21 6 v 1 2 A pr 1 99 9 Low energy physics and left - right symmetry . Bounds on the model parameters
نویسندگان
چکیده
Low energy physics and left-right symmetry. Bounds on the model parameters. Abstract In any gauge model with spontaneous symmetry breakdown the gauge boson masses and their mixings are not independent quantities. They are interconnected through the vacuum expectation values (VEVs) of the Higgs sector. We discuss the low-energy experiments, namely electron-hadron, neutrino-hadron and neutrino-electron processes in the frame of the Manifest Left-Right Symmetric model and show the impact of these dependencies on the possible heavy gauge boson masses and mixings. At 90 % C.L., we obtain M Z 2 ≥ 1475 GeV for phenomenologically favorable models, without W L − W R mixing and M Z 2 ≥ 1205 GeV in the other extreme case when a maximal mixing is possible. If we consider the left-right symmetric model parameters without any constraints from the Higgs sector these limits get down to 410 GeV. Bounds on the Z 2 mixing angle as well as the W 2 mass and its mixing angle are also given.
منابع مشابه
ar X iv : h ep - p h / 99 04 48 7 v 1 2 9 A pr 1 99 9 1 QCD Aspects of Hadron Physics
Several topics in hadron physics at different scales of resolution are discussed. First, deep-inelastic scattering from nucleons and nuclei is viewed in a light-cone coordinate space picture. Then the smooth transition from parton to hadron degrees of freedom is demonstrated by analysing generalized Q-dependent polarizabilities of the nucleon. Turning to low energy QCD we summarize recent devel...
متن کاملar X iv : h ep - e x / 99 04 01 6 v 1 1 5 A pr 1 99 9 Precision Electroweak
Preliminary SLD electroweak results based on essentially the complete 550K Z dataset are presented and interpreted, and some historical background is provided.
متن کاملar X iv : h ep - p h / 99 04 36 1 v 1 1 6 A pr 1 99 9 Coherent Interactions with heavy ions at CMS 1
متن کامل
ar X iv : h ep - p h / 99 04 23 5 v 1 5 A pr 1 99 9 Implications of Precision Electroweak Measurements for the Standard Model
We summarize the status of the Standard Model with special emphasis on the extraction of the Higgs boson mass using Bayesian inference.
متن کاملar X iv : h ep - p h / 99 04 36 2 v 1 1 6 A pr 1 99 9 Preprint SSU - HEP - 99 / 04
The proton structure and proton polarizability corrections to the Lamb shift of electronic hydrogen and muonic hydrogen were evaluated on the basis of modern experimental data on deep inelastic structure functions. Numerical value of proton polarizability contribution to (2P-2S) Lamb shift is equal to 4.4 GHz.
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 1999