arXiv subjects
Publications and source records attributed to A. V. Pak.
It was found that the spontaneous electric field can occur in doped graphene in an external dc electric field. The direction of the spontaneous field is perpendicular to the applied field. This effect can be connected with the nonequilibrium electron subsystem of graphene. It was also shown up the influence of problem parameters on the characteristics of the spontaneous field.
Methods of gamma-gamma, gamma-electron luminosities measurement at photon colliders based on Compton scattering of laser photons on high energy electrons at linear colliders are considered.
It is shown that in reaction γγ\to\ell^+\ell^-+ν's at \sqrt{s}>200 GeV with polarized photons, large and well observable differences arise in the distribution of positive and negative charged leptons (\ell=μ^\pm, e^\pm), (charge asymmetry). The modification due to the contribution of the cascade processes with intermediate τ-lepton in γγ\to W^\pm\ell^\mp + ν's reaction is taken into account. This charge asymmetry is potentially sensitive to effects of physics beyond the standard model at the anticipated luminosity of the Photon Collider mode of the future international linear collider.
The difference in distributions of $μ^+$ and $μ^-$ in reactions $γγ\to μ^+μ^-+ν\barν$ and $γγ\to W^\pmμ^\mp +ν(\barν)$ with polarized photons at $\sqrt{s}>200$ GeV is a large observable effect which is sensitive to New Physics phenomena.
It is shown that the difference in the distributions of positive ($μ^+$) and negative charged leptons ($μ^-$) in reactions $γγ\to μ^+μ^-+ν\barν$ and $γγ\to W^\pmμ^\mp +ν(\barν)$ at $\sqrt{s}>200$ GeV leads to observable {\em charge asymmetry} of muons which is sensitive to New Physics effects.