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Using a previously calculated distribution amplitude, we calculate the normalized differential cross section for two-photon pseudoscalar glueball plus meson production, γ + γ → G + π 0 . We compare to a previous calculation and to γ + γ → π 0 + π 0 .
The electric dipole moment of the neutron in the supersymmetric standard models is reconsidered. Assuming CP -violating phases are not much suppressed, we explore the region of the supersymmetric mass parameters allowed by the experiments. The chargino-loop diagram gives constraints more...
We construct event generators for p p ¯ → W + X → e + ν X and p p ¯ → Z 0 X → e + e - X including complete O ( α s ) corrections, and interface with initial- and final-state parton showers. Problems with negative weights and double-counting multiple-parton emissions are averted. We...
We study how the electroweak models of composite fermions with a large compositeness scale can be made realistic, that is, how to incorporate the three generations of massive fermions. The structure of the Higgs sector of these models must satisfy strong constraints, which we discuss in...
We consider a special class of Skyrme-like Lagrangians which include higher-order terms in the derivatives of the pion field but leave the degree of the chiral angle equation at 2. Explicit Lagrangians are constructed up to order 24. They are found to be in agreement with a previous conjecture...
To calculate the color factors in processes involving a large number of quarks and gluons, we propose direct evaluation by computer summations over color indices. Several examples are given.
Hadron masses are investigated in the framework of a chirally invariant, effective quark Hamiltonian. The hyperfine, spin-orbit, and tensor forces are found to be connected to the chiral angle, which measures the extent of vacuum condensation. The only finite eigenvalues of this Hamiltonian are...
We have operated the Soudan 1 underground muon detector in coincidence with a 36- m 2 detector situated at the Earth's surface. Such a combination of detectors can yield information on the composition of the primary cosmic rays at energies above Å 3 × 10 15 eV, where there is an abrupt change...
We systematically study supersymmetric corrections to the two-point functions of the electroweak gauge bosons. These corrections are process independent in the sense that they affect all electroweak gauge interactions. We present our results for three relevant physical quantities: the ρ...
We present the results of a calculation on the influence of anomalous γ WW and γ γ WW gauge-boson couplings on the decay of the Higgs boson into two photons. In the standard model this decay occurs via penguin diagrams with scalars, fermions, and W bosons within the loop. We show that if new...
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