AbstractAbstract
[en] At ANKE, the first data of φ-meson production in pp collisions close to threshold have been measured by detecting the K+K- decay mode at beam energies of 2.83 GeV, 2.70 GeV and 2.65 GeV. About 200-300 events exhibit a clear peak in the mass region of the φ meson with the expected mass resolution ≤ 10 MeV (FWHM). The full analysis is now in progress. Our data at these energies combined with SPES-III and TOF results on ω production will provide the energy dependence of the φ/ω cross-section ratio for the isotriplet sector, in addition to the understanding of the reaction pp →ppφ near threshold. At ANKE data have also been collected data for φ-meson production in pn collisions at 2.65 GeV. The reaction pn→dφ has been identified by detecting the fast deuteron in coincidence with the K+K- pairs from the φ decay using the deuterium cluster-jet target. Currently 750 events of φ-meson production have been identified from 30% of total data. The excess energy range from 30 MeV to 90 MeV is well covered for the pn→dφ system utilizing the Fermi momentum of the target neutron. The total cross section at several energies can be extracted at the same energy range as the pp channel. (orig.)
Primary Subject
Source
Buescher, M.; Kleber, V.; Valdau, Y. (comps.); Forschungszentrum Juelich GmbH (Germany). Zentralbibliothek; [CD-ROM]; ISBN 3-89336-376-9; ; 2004; 2 p; 6. ANKE Workshop on 'Strangeness Production on Nucleons and Nuclei'; Gatchina (Russian Federation); 8-9 Jul 2004; ISSN 1433-5506; ; Available from TIB Hannover
Record Type
Miscellaneous
Literature Type
Conference; Numerical Data
Country of publication
Descriptors (DEI)
Descriptors (DEC)
BARYON-BARYON INTERACTIONS, BOSONS, CROSS SECTIONS, DATA, DECAY, ELEMENTARY PARTICLES, ENERGY RANGE, GEV RANGE, HADRON-HADRON INTERACTIONS, HADRONS, HYDROGEN ISOTOPES, INFORMATION, INTERACTIONS, ISOTOPES, KAONS, LIGHT NUCLEI, MESONS, NUCLEI, NUCLEON-NUCLEON INTERACTIONS, NUMERICAL DATA, ODD-ODD NUCLEI, PARTICLE DECAY, PARTICLE INTERACTIONS, PARTICLE PRODUCTION, PROTON-NUCLEON INTERACTIONS, PSEUDOSCALAR MESONS, QUARKONIUM, STABLE ISOTOPES, STRANGE MESONS, STRANGE PARTICLES, STRANGEONIUM, TARGETS, VECTOR MESONS
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