Optical Mixing as a Plasma Density Probe

Radio Plasma as a Cosmological Probe

Plasma containing relativistic particles appears in various forms in the inter galactic medium (IGM): As radio plasma released by active radio galaxies, as fossil radio plasma from former radio galaxies – so called radio ghosts–, as cluster radio relics in some clusters of galaxies, and as cluster radio halos. The impact of the different forms of radio plasma on the IGM and their use as diagnos...

Quarkonium suppression as a probe of a saturated gluon plasma ?

A dense parton system is expected to be formed in the early stage of rel-ativistic heavy-ion collisions at RHIC energies and above. The probability of a quark gluon plasma production and the resulting strength of its signatures depends strongly on the initial conditions associated to the distributions of partons in the nuclear wave functions. At very high energies, the growth of parton distribu...

A single molecule as a probe of optical intensity distribution.

Single terrylene molecules embedded in microscopic p-terphenyl crystals are identified with the technique of fluorescence excitation spectroscopy. By use of the architecture of a scanning-probe microscope at T = 1.4 K , a single molecule is scanned through an excitation laser beam while the fluorescence signal is recorded. In this manner we have mapped the intensity distribution in a one-dimens...

Relativistic plasma-wave excitation by collinear optical mixing.

Jet quenching as a probe of gluon plasma formation

We study, in a pQCD calculation augmented by nuclear effects, the jet energy loss needed to reproduce the π spectra in Au+Au collisions at large pT , measured by PHENIX at RHIC. The transverse width of the parton momentum distributions (intrinsic kT ) is used phenomenologically to obtain a reliable baseline pp result. Jet quenching is applied to the nuclear spectra (including shadowing and mult...