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Title: Physics at CELSIUS and COSY

Abstract

We review some selected experimental results achieved at the synchrotrons CELSIUS in Sweden and COSY in Germany. They concentrate on meson production with emphasis on the underlying quark structure. The project WASA at COSY is discussed and the search for symmetry breaking in decays of {eta} and {eta}' mesons is highlighted.

Authors:
 [1]
  1. Institut fuer Kernphysik, Forschungszentrum Juelich, 52425 Juelich (Germany)
Publication Date:
OSTI Identifier:
20798068
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 814; Journal Issue: 1; Conference: 11. international conference on hadron spectroscopy, Rio de Janeiro (Brazil), 21-26 Aug 2005; Other Information: DOI: 10.1063/1.2176481; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; COSY STORAGE RING; ETA MESONS; ETA PRIME-958 MESONS; FEDERAL REPUBLIC OF GERMANY; MULTIPARTICLE SPECTROMETERS; PARTICLE DECAY; PARTICLE IDENTIFICATION; PARTICLE PRODUCTION; REVIEWS; SWEDEN; SYMMETRY BREAKING

Citation Formats

Machner, H. Physics at CELSIUS and COSY. United States: N. p., 2006. Web. doi:10.1063/1.2176481.
Machner, H. Physics at CELSIUS and COSY. United States. doi:10.1063/1.2176481.
Machner, H. Sat . "Physics at CELSIUS and COSY". United States. doi:10.1063/1.2176481.
@article{osti_20798068,
title = {Physics at CELSIUS and COSY},
author = {Machner, H.},
abstractNote = {We review some selected experimental results achieved at the synchrotrons CELSIUS in Sweden and COSY in Germany. They concentrate on meson production with emphasis on the underlying quark structure. The project WASA at COSY is discussed and the search for symmetry breaking in decays of {eta} and {eta}' mesons is highlighted.},
doi = {10.1063/1.2176481},
journal = {AIP Conference Proceedings},
number = 1,
volume = 814,
place = {United States},
year = {Sat Feb 11 00:00:00 EST 2006},
month = {Sat Feb 11 00:00:00 EST 2006}
}
  • Physics at the COoler SYnchrotron and storage ring COSY focus on studies of aspects of QCD in the nonperturbative regime. Hadron structure and dynamics in the production and decay of light hadrons or hadronic resonances, and the fate of fundamental symmetries and symmetry breaking patterns in hadronic systems are the key issues within the physics program.Recent experimental results - with a main emphasis on the strangeness degree of freedom - obtained at the internal and external facilities are presented.
  • Hadron physics aims at a fundamental understanding of all particles and their interactions that are subject to the strong force. Experiments using hadronic probes could contribute to shed light on open questions on the structure of hadrons and their interaction as well as the symmetries of nature. The COoler SYnchrotron COSY at the Forschungszentrum Juelich accelerates protons and deuterons with momenta up to 3.7 GeV/c. The availability of both an electron cooler as well as a stochastic beam cooling system allows for precision measurements, using polarized proton and deuteron beams in combination with polarized Hydrogen or Deuterium targets.This contribution summarizesmore » the ongoing physics program at the COSY facility using ANKE, WASA and TOF detector systems with polarized hadronic probes, highlighting recent results and outlining the new developments.« less
  • The WASA detector facility is an internal experiment at the COoler SYnchrotron COSY in Juelich, Germany. The COSY accelerator provides proton and deuteron beams with momenta up to 3.7 GeV/c giving access to hadron physics including the strange quark sector. The WASA-at-COSY physics program focuses on light meson decays where rare decays are used to scrutinize symmetries and symmetry breaking. The structure of hadrons is probed with transition form factors and hadron spectroscopy while hadron dynamics is studied via reaction dynamics and few body reactions. Goals and status are reported with special emphasis on the meson Dalitz decays.
  • COSY, a storage and cooler synchrotron, which is fed by an injector cyclotron, is operated at Forschungszentrum Juelich (Germany). It provides phase space cooled polarized or unpolarized beams of protons and deuterons with momenta between 0.3 and 3.7 GeV/c for internal experiments and to external target stations. The major experimental facilities, used for the ongoing physics program, are ANKE and WASA (internal) and TOF (external). A new internal target station to investigate polarization build-up by spin-filtering (PAX) has recently been commissioned. COSY is the machine for hadron spin physics on a world-wide scale, which is also used for tests inmore » conjunction with plans to build a dedicated storage ring for electric dipole moment (EDM) measurements of proton, deuteron and {sup 3}He. In this contribution recent results as well as future plans are summarized.« less
  • We report first results from measuring transverse cooling times by kicking the beam and then observing turn-by-turn beam positions which decay as a function of time. The measurements are done for several electron beam currents.