“…Two kinds of Higgs doublets are postulated to mediate scalar interactions between $i$-th generation of light fermion doublets and $j$-th generation of heavy fermion singlets with relative Yukawa coupling constants of exponential form $e^{i\phi_{ij}}$, where $\phi_{ij}$ are real phase constants. …”
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“…The minimal set of operators brings new couplings in the effective Lagrangian, notably "wrong"-Higgs Yukawa couplings and contact fermion-fermion-scalar-scalar interactions, whose effects are expected to be larger than those generated in the MSSM at loop or even tree level. …”
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“…In this letter, we show how the combination of both a gauged U(1)_X family symmetry and an extended vertical gauge symmetry in a single model, allows for the presence of additional Clebsch texture zeroes in the fermion mass matrices. This leads to new structures for the textures, with increased predictivity, as compared to schemes with enhanced family symmetries only. …”
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“…Together with our construction in the charged fermion sector this leads, via the usual see-saw mechanism, to a realistic light neutrino mass scale and large neutrino mixing angles.…”
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“…Chapter 3 explains the correlation functions for systems with four-fermion negative interaction. The last chapter sh…”
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“…The experimental methods for measuring the forward-backward asymmetry of charged-fermion pair-production are described, for different fermion species. …”
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“…In gauge theories with slowly-running coupling constants, it may be possible for four-fermion operators to be nearly marginal. Such operators can possess asymptotically weak couplings, and can plausibly give rise to light composite vector mesons.…”
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“…At high energies photon-photon interactions are dominated by quantum fluctuations of the photons into fermion-antifermion pairs and into vector mesons. …”
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“…A brief review is presented of selected topics, including a world- sheet formulation of M theory, couplings and scales in M phenomenology, the perils of baryon decay and the possible elevation of free-fermion models to true M- or F-theory compactifications. (35 refs).…”
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“…The more general case of neutral-current four-fermion production and the particular case of ZZ events enriched in b quarks are also discussed. …”
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“…I discuss the behaviour of algorithms for dynamical fermions as the sea-quark mass decreases. I focus on the Hybrid-Monte-Carlo (HMC) algorithm applied to two degenerate flavours of Wilson fermions. …”
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“…A recently proposed formulation of chiral lattice gauge theories is reviewed, in which the locality and gauge invariance of the theory can be preserved if the fermion representation of the gauge group is anomaly-free.…”
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“…In our lattice formulation, the heavy quark is treated in the static approximation, while the strange one belongs to a doublet of twisted mass fermions at full twist, i.e. with twist angle alpha=pi/2. …”
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“…We point out an enhancement of the pair production rate of charged fermions in a strong electric field in the presence of time dependent classical axion-like background field, which we call axion assisted Schwinger effect. …”
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“…The optimal properties, unbiasedness and consistent error estimation of this method are demonstrated by Monte Carlo experimentation using $\ell \nu jj $ four-fermion final state topologies. Emphasis is given in the determination of the expected sensitivities in estimating the $\lambda_{\gamma} - \Delta g_{1}^{z}$ and GeV LEPII run.…”
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“…In the standard Higgs model of electroweak symmetry breaking, the Higgs boson is associated with both vector-boson and fermion mass generation. In contrast, we discuss a two-Higgs-doublet model in which these masses are associated with two different scalar bosons. …”
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“…The production of the Standard Model Higgs boson in the four-fermion reaction e^+ e^- \to \mu^+ \mu^- b \bar b is studied. …”
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“…The results are interpreted in several different models, such as a new, heavy SM-like boson W with and without interference with the SM W-boson, split UED and a four-fermion contact interaction as a sign of fermion compositeness. …”
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“…The results are interpreted in several different models, such as a new, heavy SM-like boson W with and without interference with the SM W-boson, split UED and a four-fermion contact interaction as a sign of fermion compositeness. …”
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“…--HTML-->Bosonization duality is well-known in 2d free theories for boson/fermion and interacting theories such as sine-Gordon/Massive Thiring models. …”
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