The production of heavy quarks has been studied in photoproduction processes with the ZEUS detector at HERA using an integrated luminosity of 36.9 pb. Events with a photon virtuality, Q < 1 GeV, were selected with two jets of high transverse energy and an electron in the final state. Consideration of the distribution in p T − the momentum of the electron transverse to the axis of the jet to whi...

A partial wave analysis of the centrally produced KK and ππ systems shows that the f J (1710) has J = 0. In addition, a study of central meson production as a function of the difference in transverse momentum (dP T) of the exchanged particles shows that undisputed qq mesons are suppressed at small dP T whereas the glueball candidates are enhanced and that the production cross section for differ...

A relativistic Eulerian Vlasov code is presented to simulate laser-plasma interactions. Eulerian Vlasov codes have a very low noise level and allow detailed analysis of lowdensity regions of phase-space. The code we present is 1D (one space dimension x and one momentum dimension px) with a fluid momentum py, and includes both ion and electron dynamics. The laser is incident from the left as a t...

The mean transverse momentum in high energy nuclear collisions is studied. The formation of a Color Glass Condensate results in an increase of the square of the mean transverse momentum with the charged multiplicity per unit rapidity and unit transverse area. This prediction is in agreement with the presently available data, in particular with the heavy-ion data, lending support to the notion t...

A partial wave analysis of the centrally produced KK and ππ systems shows that the fJ (1710) has J = 0. In addition, a study of central meson production as a function of the difference in transverse momentum (dPT ) of the exchanged particles shows that undisputed qq mesons are suppressed at small dPT whereas the glueball candidates are enhanced and that the production cross section for differen...

This paper concerns the second law analysis of a viscoelastic fluid over a stretching sheet subject to a transverse magnetic field with heat and mass transfer. The velocity, temperature and concentration profiles are obtained analytically using Kummer’s functions. The effects of the magnetic and viscoelastic parameters on both the longitudianl and the transverse velocities are investigated. The...

The occurrence of SH wave propagation under the effect of a point source in an orthotropic substratum lying over a heterogeneous orthotropic half space is deliberated in the prospect of a devastating earthquake. The quadratic alteration is acknowledged for density and shear modulus which is hypothesized to be a function of depth. The method of Green's function and transformation technique contr...

The dispersion relations and polarizations for the surface waves on infinite planar samples in QHE regime are explicitly determined in the small wavevector limit in which the dielectric tensor can be considered as local. The wavelength and frequency regions of applicability of the results extends up to the infrared region for typical experimental conditions. Then, standard samples with millimet...

Dispersion relations and polarizations for surface waves in infinite planar samples in the QHE regime are explicitly determined in the small wavevector limit in which the dielectric tensor can be considered local. The wavelength and frequency regions of applicability of the results extends to the infrared region for typical experimental conditions. Then, standard samples with millimetric sizes ...

We demonstrate experimentally and theoretically random-phase surface solitons in effectively instantaneous nonlinear media. The key mechanism for self-trapping is played by a nonlocal nature of the nonlinearity, in contrast to other incoherent solitons involving time averaging. These incoherent surface solitons display features different from their bulk counterparts and from other surface waves.