A bstract We bound EFT coefficients appearing in 2 ? photon scattering amplitudes four dimensions. After reviewing unitarity and positivity conditions this context, we use dispersion relations crossing symmetry to compute sum rules null constraints. This allows us derive new rigorous bounds on operators with four, six, eight derivatives, including two-sided their ratios. Comparing a number of p...

Rayleigh-Brillouin (RB) scattering profiles for air have been recorded for the temperature range from 255 to 340 K and the pressure range from 640 to 3300 mbar, covering the conditions relevant for the Earth's atmosphere and for planned atmospheric light detection and ranging (LIDAR) missions. The measurements performed at a wavelength of λ=366.8 nm detect spontaneous RB scattering at a 90° sca...

This paper introduces quasi-aggregative games and establishes conditions under which such games admit a best-reply potential. This implies existence of a pure strategy Nash equilibrium without any convexity or quasi-concavity assumptions. It also implies convergence of best-reply dynamics under some additional assumptions. Most of the existing literature’s aggregation concepts are special cases...

We show that gelation of weakly attractive colloids is remarkably similar to the colloidal glass transition. Like the glass transition, dynamic light scattering functions near gelation scale with scattering vector, and exhibits a two-step decay with a power-law divergence of the final decay time. Like the glass transition, static light scattering does not change upon gelation. These results sug...

The spin-wave modes in nanoscale permalloy stripes are studied using Brillouin light scattering for the case where an external magnetic field is applied transversely to the length of the stripes. By adjusting the magnitude of this external field, the overall magnetization may be varied between the approximately transverse and longitudinal orientations. The observed spin-wave frequencies are ana...

A HeNe laser beam incident on a sample of micron-sized spheres suspended in water scatters into a random pattern of spots of varying size, shape, and intensity. The pattern results from the coherent superposition of the outgoing waves scattered from the spheres. Because the spheres are in constant Brownian motion, the pattern randomly changes in time. A photodetector is placed in the pattern an...

Rcation of short-lived free radicals by an electron spin resonance trapping technique. Journal of the American Chemical Society 90: 5909}5910. Kroll C, Osterloh K, MaK der K and Borchert H-H (1998) On-line coupled HPLC-ESR: Application for separation and characterization of organic radicals. Archiv der Pharmazie } Pharmaceutical and Medicinal Chemistry 331 (2): 40. Osterloh K, Kroll C, MaK der ...

On-line coupling of high performance liquid chromatography (HPLC) to capillary gas chromatography (GC) means that LC fractions comprising one or several peaks are directly transferred to the gas chromatograph, mostly in a fully automated mode. The Rrst coupled system, developed by R. Majors in 1980, involved splitless injection by means of a GC autosampler andmerely transferred a small part of ...

By scattering light from small particles, their geometrical structure and their state of motion can be measured. An experiment is described for measuring the diffusivity of small particles undergoing Brownian motion using the technique called photon correlation spectroscopy or dynamic light scattering. The necessary experimental apparatus and the related theory are discussed. Photon correlation...