610 research outputs found
Plane SPDC-Quantum Mirror
In this paper the kinematical correlations from the phase conjugated optics
(equivalently with crossing symmetric spontaneous parametric down conversion
(SPDC) phenomena) in the nonlinear crystals are used for the description of a
new kind of optical device called SPDC-quantum mirrors. Then, some important
laws of the plane SPDC-quantum mirrors combined with usual mirrors or lens are
proved only by using geometric optics concepts. In particular, these results
allow us to obtain a new interpretation of the recent experiments on the
two-photon geometric optics.Comment: 12 pages, 5 figures. arXiv admin note: substantial text overlap with
arXiv:0810.340
A New Optimal Bound on Logarithmic Slope of Elastic Hadron-Hadron Scattering
In this paper we prove a new optimal bound on the logarithmic slope of the
elastic slope when: elastic cross section and differential cross sections in
forward and backward directions are known from experimental data. The results
on the experimental tests of this new optimal bound are presented in Sect. 3
for the principal meson-nucleon elastic scatterings: pion-nucleon, kaon-nucleon
at all available energies. Then we have shown that the saturation of this
optimal bound is observed with high accuracy practically at all available
energies in meson-nucleon scattering.Comment: format revtex4, 4 pages, 1 figur
Analytical Description of Hadron-Hadron Scattering via Principle of Minimum Distance in Space of States
In this paper an analytical description of the hadron-hadron scattering is
presented by using PMD-SQS-optimum principle in which the differential cross
sections in the forward and backward c.m. angles are considered fixed from the
experimental data. Experimental tests of the PMD-SQS-optimal predictions,
obained by using the available phase shifts, as well as from direct
experimental data, are presented. It is shown that the actual experimental data
for the differential cross sections of all principal hadron-hadron
[nucleon-nucleon, antiproton-proton, mezon-nucleon] scatterings at all energies
higher than 2 GeV, can be well systematized by PMD-SQS predictions.Comment: 18 pages, 10 figure
Toward a New Phenomenon: Super-Cerenkov Radiation
In this letter a new coherent gamma emission mechanism, called Super-Cerenkov
radiation, is introduced. The SCR is expected to take place when the charged
particle is moving in a medium with a phase velocity satisfying the
super-coherent condition. The results on an experimental test of SCR in RICH
detector are presented.Comment: 5 pages, 2 figure
Super-Cerenkov Radiation: A new phenomenon useful for RICH Detectors
In this contribution the Super-Cerenkov radiation (SCR) as a new phenomenon
which includes in a more general and exact form the usual Cerenkov effect is
presented. The Super-Cerenkov effect at Cerenkov threshold in the radiators of
RICH detectors is investigated. The results on the experimental test of the
super- Cerenkov coherence conditions are presented. The SCR-predictions are
verified experimentally with high accuracy chi/n_{dof}=1.47 by the data on the
Cerenkov ring radii of electron, muon, pion and kaon, all measured with RICH
detector. Moreover, it is shown that the Super-Cerenkov phenomenon can explain
not only subthreshold CR but also the observed secondary rings (or anomalous
Cerenkov radiation) observed at CERN SPS accelerator. The influence of medium
on the particle propagation properties is also estimated and the refractive
properties of electrons, muons, pions, in the radiator C4F10Ar are obtained.
So, we proved that the refractive indices of the charged elementary particles
in medium are also very important for the RICH detectors, especially at low and
intermediate energies.Comment: 9 pages, 7 figure
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