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62 papers · 1 filter
Hamiltonian of Tensionless Strings with Tensor Central Charge Coordinates
A. A. Zheltukhin, U. Lindström
A new class of twistor-like string models in four-dimensional space-time extended by the addition of six tensorial central charge (TCC) coordinates is studied. The Hamilto…
Can SUSY be found at the Tevatron Run II ?
Anna Lipniacka
Searches for SUSY particles are the main physics focus of the ongoing Run IIa of the Tevatron. LEP results have constrained heavily the Minimal Supersymmetric Standard Model. In th…
Sporadic electron jets from cathodes - The main breakdown-triggering mechanism in gaseous detectors
C. Iacobaeus, M. Danielsson, P. Fonte +3
We have demonstrated experimentally that the main breakdown-triggering mechanism in most gaseous detectors, including micropattern gaseous detectors, is sporadic electron jets from…
A unified treatment of quartic invariants at fixed and arbitrary energy
Max Karlovini, Giuseppe Pucacco, Kjell Rosquist +1
Two-dimensional Hamiltonian systems admitting second invariants which are quartic in the momenta are investigated using the Jacobi geometrization of the dynamics. This approach all…
Low Energy Singlets in the Excitation Spectrum of the Spin Tetrahedra System Cu_2Te_2O_5Br_2
P. Lemmens, K. Y. Choi, A. Ionescu +8
Low energy Raman scattering of the s=1/2 spin tetrahedra system Cu_2Te_2O_5Br_2 is dominated by an excitation at 18 cm^{-1} corresponding to an energy E_S=0.6Δ, with Δthe spin gap…
N=1 supersymmetric sigma model with boundaries, I
Cecilia Albertsson, Ulf Lindstrom, Maxim Zabzine
We study an N=1 two-dimensional non-linear sigma model with boundaries representing, e.g., a gauge fixed open string. We describe the full set of boundary conditions compatible wit…