Global Power Counting Analysis On Probing Electroweak Symmetry Breaking Mechanism At High Energy Colliders

We develop a precise power counting rule (a generalization of Weinberg's counting method for the nonlinear sigma model) for the electroweak theories formulated by chiral Lagrangians. Then we estimate the contributions of ``all'' next-to-leading order (NLO) bosonic operators to the amplitudes of the relevant scattering processes which can be measured at high energy colliders, such as the LHC and future Linear Colliders. Based upon these results, we globally classify the sensitivities of testing all NLO bosonic operators for probing the electroweak symmetry breaking mechanism at high energy colliders.Comment: Version Published in Physics Letters B. Latex, 12 pages, minor typos correcte

Estimating the sensitivity of LHC to electroweak symmetry breaking: Longitudinal/Goldstone boson equivalence as a criterion

Based upon our recent study (Phys. Rev. D, vol.51, p.6463, 1995), we reveal the profound physical content of the longitudinal/Goldstone boson equivalence theorem as being able to discriminate physical processes which are sensitive/insensitive to probing the electroweak symmetry breaking (EWSB) sector. We then develop a precise electroweak power counting rule (a generalization from Weinberg's counting method) to separately count the power dependences on the energy E and all relevant mass scales. With these, we analyze the complete set of the bosonic operators in the electroweak chiral Lagrangian and systematically estimate and classify the sensitivities for testing all these effective operators at the CERN LHC via the weak-boson fusions and quark-anti-quark annihilations. These two kinds of processes are shown to be complementary in probing the EWSB mechanism. (orig.)SIGLEAvailable from TIB Hannover: RA 2999(96-148) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman

Global analysis for probing electroweak symmetry breaking mechanism at high energy colliders

We review our recent global analysis for probing the electroweak symmetry breaking (EWSB) mechanism by the universal effective Lagrangian description. After summarizing and commenting upon the current bounds for the EWSB parameters, we focus on testing them at the forthcoming high energy colliders such as the CERN LHC and the future linear colliders. We develop a precise electroweak power counting method (a la Weinberg) and formulate the longitudinal-Goldstone boson equivalence as a necessary criterion for sensitively probing the EWSB sector. Armed with these, we systematically estimate and classify the contributions of all next-to-leading order (NLO) bosonic operators to various scattering processes at the high energy colliders. The experimental signatures at these colliders are also analyzed. Furthermore, the complementarity of different scattering processes via different colliders for a complete probe of all these NLO effective operators is demonstrated. (orig.)Available from FIZ Karlsruhe / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman

Probing electroweak symmetry braking mechanism at the LHC: A guideline from power counting analysis

We formulate the equivalence theorem as a criterion for sensitively probing the electroweak symmetry breaking mechanism, and develop a precise power counting rule for chiral Lagrangian formulated electroweak theories (CLEWT). With these we give a systematic analysis on the sensitivities of the scattering processes W"#+-#W"#+-##->#W"#+-#W"#+-# and q anti q'#->#W"#+-#Z to probing all possible effective bosonic operators in the CLEWT at the CERN Large Hadron Collider (LHC). (orig.)16 refs.SIGLEAvailable from TIB Hannover: RN 437(96-029) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman