Investigation of K{sup +}-meson production in pp and pA collisions with ANKE

Journal Article · Tue Apr 02 04:00:00 EST 2002 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.1469947· OSTI ID:20618860

Buescher, Markus ^[1]

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1. Institut fuer Kernphysik, Forschungszentrum Juelich, 52425 Juelich (Germany)

The production of K{sup +}-mesons in proton-nucleus collisions has been measured with the ANKE spectrometer at COSY-Juelich. The kaons, produced on internal C, Cu and Au targets and emitted under forward angles {theta}{sub K}{approx}0 deg., were separated from the circulating COSY beam and momentum analyzed with the help of a chicane-like magnetic system. Double differential spectra were obtained for beam energies T{sub p}=1.0...2.3 GeV, thus above and far below the free nucleon-nucleon threshold at T{sub NN}=1.58 GeV. The data taken at T{sub p}=1.0 GeV reflect a high degree of collectivity of the target nucleus. For T{sub p}{>=}1.2 GeV the invariant cross sections obtained from ANKE as well as from other experiments show a uniform behavior when plotted as a function of the four-momentum transfer t between the beam proton and the produced kaon. More recent ANKE data on K{sup +}-production in elementary proton-proton collisions taken at T{sub p}=2.65 GeV allow to extract information about the production cross sections for {lambda}(1116), {sigma}(1280) and {lambda}(1405)-hyperons and indicate a signal from the {sigma}(1480). Furthermore, a clean sample of pp{yields}dK{sup +}K{sup 0} events has been obtained which may be assigned to scalar a{sub 0}{sup +}-meson production.

• OSTI ID: 20618860
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 610; ISSN 0094-243X; ISSN APCPCS
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
A0-980 MESONS
CARBON 12 TARGET
COPPER 63 TARGET
COSY STORAGE RING
DIFFERENTIAL CROSS SECTIONS
FOUR MOMENTUM TRANSFER
GEV RANGE
GOLD 197 TARGET
KAONS MINUS
KAONS NEUTRAL
KAONS PLUS
LAMBDA-1405 BARYONS
MULTIPARTICLE SPECTROMETERS
PARTICLE PRODUCTION
PROTON REACTIONS
PROTON-PROTON INTERACTIONS
PROTONS
SIGMA BARYONS
TRANSVERSE MOMENTUM