Novosibirsk Tau-Charm factory design study

A method of colliding beams is developed to study the fundamental properties of matter in two directions. The first direction is aimed at achieving higher energies allowing the discovery of new particles and fields. The goal of the second one is the study of more delicate fundamental properties of quarks and fields by increasing luminosity in crudely studied energy ranges. The study of CP violation is the most famous example. To study the CP violation in the region of B-quarks, the project of a B-factory as an asymmetrical electron-positron collider with a beam energy of 7/4 GeV and luminosity up to 10³⁴ cm ^-2 s^-1 was developed at BINP. During the development of this project, it became cleat that the Institute´s economical situation, which grew worse in the period of 1990-1993, did not allow us to carry out this project in a reasonable time. Besides, Japan (KEK) and USA (SLAG) began to build the B-factories. Therefore, it is hardly probable to obtain any new results on the third B-factory. On the other hand, a beam energy region of 0.7-2.5 GeV, which still is very interesting, is not studied completely. The interest in this field of research is due to a great body of information obtained on a LEAR facility which is utilized to study proton-antiproton annihilation approximately in this energy region. Studying the cross-section of production of observed resonances in electron-positron annihilation noticeably increases the value and reliability of their interpretation. In 1993, as a result of discussions, the International Program Committee on High-Energy Physics of the Ministry of Science recommended to reorientate the Novosibirsk project VEPP-5 into a Tau-Charm-factory with high luminosity