Eta-meson factory

Información del proyecto

Identificador del acuerdo de subvención: INTAS-RFBR95-0605

Fecha de inicio

Fecha de finalización

Financiado con arreglo a

• International Association for the promotion of cooperation with scientists from the independent states of the former Soviet Union (INTAS), 1993-

Coste total

Sin datos

Aportación de la UE

Sin datos

Coordinado por

Uppsala University
Sweden

Objetivo

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.

Ámbito científico (EuroSciVoc)

Este proyecto aún no se ha clasificado con EuroSciVoc.
Sugiera los ámbitos científicos que considere más relevantes y ayúdenos a mejorar nuestro servicio de clasificación.

Programa(s)

• IC-INTAS - International Association for the promotion of cooperation with scientists from the independent states of the former Soviet Union (INTAS), 1993-

Tema(s)

• 1 - Physics, Astronomy, Astrophysics

Convocatoria de propuestas

Datos no disponibles

Régimen de financiación

Datos no disponibles

Coordinador

Uppsala University

• Aportación de la UE: Sin datos
• Dirección: 75121 Uppsala ; Suecia
• Coste total: Sin datos

Participantes (1)

Joint Institute for Nuclear Research

Rusia

• Aportación de la UE: Sin datos
• Dirección: 141980 Dubna, Moscow Region
• Coste total: Sin datos