Objective
The main objective of the project is to build and bring into operation an accelerator-detector set-up, an Eta Meson Factory, by which 1010 eta mesons can be produced annually. It will permit future high precision studies in Russia of the physics of rare decays. Important questions to be studied concern the transition form factors, the validity of symmetries, in particular C symmetry in the electromagnetic interaction, and the search for exotic processes. The experimental information about decay modes of the eta meson is scarce and more information is definitely needed.
The of the key ingredients of the proposed Eta - Meson Factory is the cooler storage ring CELSIUS where a beam of protons circulating in a storage ring is refined by means of electron cooling and made to interact with very thin internal targets, small solid hydrogen pellets, developed especially for the purpose. In this way it is possible to have a rate of 2000 ( per second, far more than obtainable in present e+e- colliders in Novosibirsk and Cornell and above what can be obtained at DAPHNE, the future ( factory.
There are several innovative features of the project. The pellet target system is a novelty. The pellets are well localized and pure targets providing the necessary high luminosity. An extremely thin-walled super-conducting solenoid (0,18 rad. lengths thick) is placed inside of an electromagnetic calorimeter, (CsI crystals) and this design permits detection of the electromagnetic shower in the absence of magnetic field. The reaction rates, up to 10 MHz require careful and up-to-date design of detector parts and of the acquisition system.
The Russian groups involved in this project form the core of the WASA-collaboration comprising 70 scientists from Sweden, Germany, Poland, Japan and Russia. The Novosibirsk group builds the CsI crystals and will take part in the simulations and the analysis, and its close connection with the collider VEPP2M adds value to the proposed project. The ITEP group looks for exotics in the produced two-nucleon-two-pion system and prepares simulation programs for leptonic rare decay modes. The Dubna JINR group is responsible for the drift chamber and the tagging spectrometer. An analysis centre will be prepared in Dubna for taking care of data coming from the experiment in Uppsala. The newly created Dubna University will interact with the Uppsala University and Tübingen University for the joint research education of Ph. D. students. The Tubingen group is responsible in particular for the research on exotic two-nucleon states and the Uppsala group is the host for activities in Uppsala.
Fields of science (EuroSciVoc)
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Programme(s)
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Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Topic(s)
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Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
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Funding Scheme
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Coordinator
75121 Uppsala
Sweden
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.