2,424,783 research outputs found
Solar Neutrino Matter Effects Redux
Following recent low-threshold analysis of the Sudbury Neutrino Observatory
and asymmetry measurements of the BOREXINO Collaboration of the solar neutrino
flux, we revisit the analysis of the matter effects in the Sun. We show that
solar neutrino data constrains the mixing angle poorly and that
subdominant Standard Model effects can mimic the effects of the physics beyond
the Standard Model.Comment: 12 pages of LATEX, 8 figure
Sorption vacuum trap Patent
Describing sorption vacuum trap having housing with group of reentrant wall portions projecting into internal gas-pervious container filled with gas and vapor sorbent materia
Conductance fluctuations in quasi-two-dimensional systems: a practical view
The universal conductance fluctuations of quasi-two-dimensional systems are
analyzed with experimental considerations in mind. The traditional statistical
metrics of these fluctuations (such as variance) are shown to have large
statistical errors in such systems. An alternative characteristic is
identified, the inflection point of the correlation function in magnetic field,
which is shown to be significantly more useful as an experimental metric and to
give a more robust measure of phase coherence.Comment: 9 pages, 7 figure
Quark-Loop Amplitudes for W^+- H^-+ Associated Hadroproduction
In this addendum to our paper entitled "W^+- H^-+ Associated Production at
the Large Hadron Collider" [Phys. Rev. D 59, 015009 (1999)], we list analytic
results for the helicity amplitudes of the partonic subprocess gg -> W^-H^+
induced by virtual quarks.Comment: 6 pages (Latex
Texturing polymer surfaces by transfer casting
A technique for fabricating textured surfaces on polymers without altering their surface chemistries is described. A surface of a fluorocarbon polymer is exposed to a beam of ions to texture it. The polymer which is to be surface-roughened is then cast over the textured surface of the fluorocarbon polymer. After curing, the cast polymer is peeled off the textured fluorocarbon polymer, and the peeled off surface has negative replica of the textured surface. The microscopic surface texture provides large surface areas for adhesive bonding. In cardiovascular prosthesis applications the surfaces are relied on for the development of a thin adherent well nourished thrombus
Quark mass effects in the thermodynamical properties of an extended (P)NJL model
We analyze the thermodynamical properties of a system of strongly interacting
particles at vanishing quark chemical potential in the framework of a recently
developed extension of the Polyakov-Nambu-Jona-Lasinio Model. In addition to
eight quark interactions terms, non-canonical terms which explicitly break
chiral symmetry up to the same order in a expansion ( number of
colors) are included. A recently proposed Polyakov potential is considered and
the results are compared to lattice QCD data resulting in a favorable scenario
for the recent model variants.Comment: To appear in the proceedings of "8th International Conference on
Quarks and Nuclear Physics (QNP2018)
Chirped gratings in integrated optics
Gratings with variable periods (chirped gratings) have been fabricated by recording the interference pattern of a collimated laser beam with a converging beam generated by a cylindrical lens. An analysis is presented for the behavior of the chirped gratings as a function of wavelength, the angle between the illuminating beams, the F number of the lens, and its position. To calculate the power radiated into air, the coupled-mode equations are solved for the case of a waveguide with chirped surface corrugation. Experimentally, chirped gratings have been etched on the surface of an optical waveguide and used to couple light out of the waveguide. It was found that the light was focused outside the waveguide, and the fraction of the power radiated into air compared favorably with the theoretical calculation. The focal point outside the waveguide was found to move by about 1 cm when the wavelength was changed by 500 Å-in agreement with theoretical estimates
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