Objective Particular goals of the project are:- to improve precision of extraction of pi0 and eta meson contents from two-photon invariant mass spectra, taken in high multiplicity environment of ultrarelativistic heavy-ion collisions- to obtain first experimental yields and transverse momentum spectra of pi0- and eta-mesons produced in central as well as peripheral Pb+Pb collisions at an energy of 160GeV/nucleon;- to obtain first experimental yields of neutral mesons of higher masses in ultrarelativistic nucleus-nucleus collisions from two- , three-, and four- photon invariant mass distributions, and, in particular, omega-mesons;- to search for thermal and direct photon emission in Pb+Pb collisions;- to search for effects of collective flow;- to search for HBT-correlation effects in four-photon distributions;- the data set of 30 million central events and of 20 million peripheral events of Pb+Pb collisions at an energy of 160GeV/nucleon taken by the WA98 experiment at CERN will be comprehensively analysed;- the pi0 and eta yields and spectra in a broad p_t range will be determined with high precision by analysing two-photon invariant mass distributions, applying the mixed event technique and taking into account residual two-photon correlations due to multiphoton resonance decays;- the heavier mass neutral meson yields will be evaluated by complementary studies of three- and four- photon invariant mass distributions as well as two-photon residual correlations;- the collective flow effects in multiparticle correlations will be studied;- the HBT effects in photon correlations will be studied;- direct photon radiation will be searched for and studied or its upper limits will be found with a sensitivity about 5%. Programme(s) IC-INTAS - International Association for the promotion of cooperation with scientists from the independent states of the former Soviet Union (INTAS), 1993- Topic(s) 1A - Nuclear Physics, Astronomy, Astrophysics INTAS - INTAS Call for proposal Data not available Funding Scheme Data not available Coordinator Universitat Munster EU contribution No data Address Wilhelm Klemm Strasse 9 48149 Munster Germany See on map Total cost No data Participants (3) Sort alphabetically Sort by EU Contribution Expand all Collapse all Russian Research Center "Kurchatov Institute" Russia EU contribution No data Address Kurchatov square 1 123182 Moscow See on map Total cost No data State Scientific Center of the Russian Federation Russia EU contribution No data Address Bolshaya Cheremushkinskaya 25 117259 Moscow See on map Total cost No data Universite de Nantes France EU contribution No data Address Rue Alfred Kastler 4 44307 Nantes See on map Total cost No data
