Quark‐gluon densities in the nuclear fragmentation region in heavy ion collisions at LHC
At the LHC, the leading partons in the nuclei are expected to interact with the maximal possible strength — black disk limit — up to transverse momenta of the order of few GeV. We demonstrate that in this limit the densities of the quark — gluon systems produced in the central AA collisions in the nucleus fragmentation regions should exceed 300GeV/fm3 which is at least as high as the densities discussed for the central region. Experimental signatures of such a regime are also discussed.
Achieving high baryon densities in the fragmentation regions in heavy ion collisions at top RHIC energy
Heavy ion collisions at extremely high energy, such as the top energy at RHIC, exhibit the property of transparency where there is a clear separation between the almost net-baryon-free central rapidity region and the net-baryon-rich fragmentation region. We calculate the net-baryon rapidity loss and the nuclear excitation energy using the energy-momentum tensor obtained from the McLerran-Venugopalan model. Nuclear compression during the collision is further estimated using a simple space-time picture. The results show that extremely high baryon densities, about twenty times larger than the normal nuclear density, can be achieved in the fragmentation regions.
Development of Science and Technology in the Iranian Electric Power Industry: Challenges and Future Progress
This chapter examines four key segments of the electric power industry in Iran: generation, transportation, distribution and consumption. It reviews the method, development, and evolution of electric power generation in the country. Specifically, the chapter reviews the structure of the electric industry, the main players, institutions, standards as well as laws, human resources, technology, the export and import markets, and engineering management of the industry in the country. Finally, the challenges facing the industry will be identified and policy suggestions to remedy the problems will be provided.