Squeezing lepton pairs out of broken symmetries

We discuss two possible signatures of symmetry breaking that can appear in dilepton spectra, as measured in relativistic heavy ion collisions. The first involves scalar-vector meson mixing and is related to the breaking of Lorentz symmetry by a hot medium. The second is related to the breaking of Furry's theorem by a charged quark-gluon plasma. Those signals will be accessible to upcoming measurements to be performed at the GSI, RHIC, and the LHC.Comment: 5 pages, 4 figures, talk given at the INPC 2001 (International Conference on Nuclear Physics), 30 July - 3 August 2001, Berkeley, C

Modified Dihadron Fragmentation Functions in Hot and Nuclear Matter

Medium modification of dihadron fragmentation functions due to gluon bremsstrahlung induced by multiple partonic scattering is studied in both deep-inelastic scattering (DIS) off large nuclei and high-energy heavy-ion collisions within the same framework of twist expansion. The modified fragmentation functions for dihadrons are found to follow closely that of single hadrons leading to a weak nuclear suppression of their ratios as measured by HERMES in DIS experiments. Meanwhile, a moderate medium enhancement of the near-side correlation of two high transverse momentum hadrons with increasing centrality is found in heavy-ion collisions because of the trigger bias and the increase in parton energy loss with centrality. Successful comparisons between theory and experiment for multi-hadron observables in both confining and deconfined environments offers comprehensive evidence for partonic energy loss as the mechanism of jet modification in dense matter.Comment: 4 pages, Revtex, 2 figures, revised figures and discussio

MICROMETRIC EVALUATION OF MELASTOMA MALABATHRICUM L. FLOWER

Objective: To assess the effectiveness of micrometric evaluation in the standardization process of raw drugs. In this work, emphasis has been mainly put on micrometric evaluation of different parts of M. malabathricum L. flower.Methods: Transverse section of various parts of the flower was taken and dry flower was also made into powder, then micrometric measurement of individual characters or a group of tissues was evaluated.Results: Experimental study revealed that the transverse section of the filament is circular in shape. Measurement of the outermost layer or the epidermis of the filament is 0.49–0.64 mm in diameter. Transverse section of the style is circular in shape and consists of 3 concentric spherical rings and measurement of an outer ring is 0.65 mm in diameter.Conclusion: With the data generated in this research work it can be concluded that micrometric evaluation of the subjected drugs is an effective tool for the standardisation process with special reference to specific parts (in this case, flower) of raw drugs.Â