[en] We study the production of heavy bound states of squarks at the SSC and analyze their decays into longitudinal W's and Z's. In some situations a squarkonium state can be detected through its decay into a pair of W's

[en] We consider extensions of the minimal Standard Model with various alternatives for the symmetry breaking sector. Different underlying theories are parametrized in terms of the coefficients of a chiral lagrangian. At present and future energies, assuming an exact custodial symmetry in the symmetry breaking sector, all relevent information is contained in just four coefficients. We analyze how to determine these coefficients in the minimal Standard Model with a large Higgs mass, where ordinary perturbation theory is not well suited, and in a class of vector-like technicolor models, but the extension to more general theories is straightforward. We study how to compute radiative corrections in an unambiguous manner and how to extract precise information even if the symmetry breaking sector is described by an effective theory. In doing that we clarify the relationship between the linear and non-linear theories. We apply our techniques to the processes e⁺e^-→anti ff and e⁺e^-→W⁺W^-, introducing in the latter case an improved Born approximation with a number of phenomenological constants. We identify those processes where it will be possible to unambiguously probe the symmetry breaking sector and compute the full set of one-loop corrections to them in different underlying theories. (orig.)

[en] A chiral lagrangian expansion is used in order to parametrize the unknown symmetry breaking dynamics of the standard model, in the hypothetical case of a strongly interacting symmetry breaking sector. To lowest order, O(s), the model is completely determined by the experimental fact that ρ≅1. The dependence on the underlying theory shows up to order s² where consistency requires one-loop effects to be included through two renormalized parameters. The unitarity properties and the domain of applicability of the model are studied. Some experimental prospects are also commented at the end. (orig.)

[en] In a previous paper, we presented a phenomenological model based on a chiral lagrangian expansion to order s² for the scattering amplitudes of the longitudinally polarized W_L and Z_L gauge bosons in the case of a generic strongly interacting symmetry breaking sector. Here we apply this model in order to study the viability of testing the strongly interacting hypothesis within the next generation e⁺e^-colliders at TeV energies. The different patterns expected for strong V_L-V_L (V_L=W_L⁺, W_L^- and Z_L) scattering that come from different underlying theories describing the symmetry breaking sector are also examined. In particular we compare in detail the predictions for two different plausible models: Higgs-like models such as the standard model with a heavy Higgs, and QCD-like models such as technicolour models. (orig.)

[en] An effective SU(2)_LxU(1)_Y invariant chiral lagrangian can accommodate any symmetry breaking scheme in the standard model. It is shown that all process-independent quantities relevant to LEP precision measurements (Δρ, Δκ and Δr) depend only on one coefficient of the weak chiral lagrangian, taking different values depending on the precise symmetry breaking scheme. We remove any ambiguity due to the use of an effective theory by a careful choice of observables and make definite predictions that can be tested in the foreseeable future. Our analysis complements nicely that of longitudinal W and Z scattering. (orig.)

[en] We calculate the QCD evolution equations for structure functions with supersymmetric particles excited for the following models: light gluinos, g tilde and heavy squarks q tilde with m g tilde<=Q²<=m2/q; light squarks, and heavy gluinos with m q tilde<=Q²<=m2/g; and m2/q, m2/g<=Q². The momentum sum rules and the behaviour of structure functions as chi->1 are particularly discussed. (orig.)

[en] We discuss the e⁺e^- production of three jets with supersymmetric particles, phianti qlambda and phisup(*)phig. Formulas for the cross sections are given. We find that, if the phi, lambda are reasonably light, the signal to background ratio makes it possible that supersymmetric jets be observed at LEP-like energies. (orig.)

[en] The authors study the production of heavy bound sttes of squarks at the SSC and analyse their decays into longitudinal W's and Z's. In some situations a squarkonium state can be detected through its decay into a pair of W's

[en] We consider Drell-Yan-like production of squarks q from anti pp, starting with a valence quark and a gluino from the sea. The signal would be a highly energetic jet,Esub(jet) proportional1/2mq, and the same amount of missing energy back to back with it. If m(gluino)< or approx.16 GeV,mqproportional60-160 GeV. The amount of such signals would be some 14 to 1 times that of the signal for anti pp->(W->eanti ν) + all. (orig.)

[en] We consider the signals due to Drell-Yan production of squarks in anti pp collisions, from a valence quark and a gluino from the sea. We find (I) a bumb on the squark mass in two and multijet events; (II) a certain number of events with jet (quark) and missing psub(t) (photino); (III) events with one jet (quark), electron/muon and missing psub(t) (photino and neutrino). (orig.)