32,960 research outputs found
Probing the ZZgamma and Zgammagamma Couplings Through the Process e+e- --> nu anti-nu gamma
We study the sensitivity for testing the anomalous triple gauge couplings
and via the process
at high energy linear colliders. For integrated luminosities of 500
and center of mass energies between 0.5 and 1.5 , we find that this
process can provide tests of the triple neutral gauge boson couplings of order
, one order of magnitude lower than the standard model prediction.Comment: 12 pages, 6 figure
High-order harmonic generation at high laser intensities beyond the tunnel regime
We present studies of high-order harmonic generation (HHG) at laser
intensities well above saturation. We use driving laser pulses which present a
particular electron dynamics in the turn-on stage. Our results predict an
increasing on the harmonic yield, after an initial dropping, when the laser
intensity is increased. This fact contradicts the general belief of a
progressive degradation of the harmonic emission at ultrahigh intensities. We
have identified a particular set of trajectories which emerges in the turn-on
stage of these singular laser pulses, responsible of the unexpected growth on
the harmonic efficiency at this high intensity regime. Our study combines two
complementary approaches: classical analysis and full quantum mechanical
calculations resulting from the numerical integration of the 3-dimensional
time-dependent Schr\"odinger equation complemented with the time-frequency
analysis
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