Koen Martens

Search for the pentaquark candidate Θ(1540)+ in the hyperon beam experiment WA89

We report on a high-statistics search for the {theta}(1540){sup +} resonance in {sigma}{sup -}-nucleus collisions at 340 GeV/c. No evidence for this resonance was found in our data sample which contains 13 million K{sub s}{sup 0}{yields}{pi}{sup +}{pi}{sup -} decays above background. For the decay channel {theta}{sup +}{yields}K{sub s}{sup 0}p and the kinematic range x{sub F}> 0.05, we find the production cross section to be BR({theta}{sup +}{yields}K{sub s}{sup 0}p){sigma}{sub 0}<1.8 {mu}b per nucleon at 99% C.L.

Search for the exotic Ξ--(1860) resonance in 340 GeV/c Σ- -nucleus interactions

We report on a high statistics search for the

V-0, (Xi)over-bar(+) and Omega(-) inclusive production cross sections measured in hyperon experiment WA89 at CERN

\Xi^{--}(1860)

Measurement of the polarization of\(\Lambda ^0 , \overline \Lambda ^0 , \Sigma ^ + \) and Ξ− produced in a Σ− beam of 330 GeV/c

resonance in

A measurement of Lambda polarization in inclusive production by Sigma- of 340-GeV/c in C and Cu targets

\Sigma^-

Spectra and correlations of Lambda and (Lambda)over-bar produced in 340-GeV/c Sigma(-)+C and 260-GeV/c n+C interactions

-nucleus collisions at 340GeV/c. No evidence for this resonance is found in our data sample which contains 676000

A measurement of ? and ? - polarization in inclusive production by S - of 340 GeV/c in C and Cu targ

\Xi^-

V, <img src="/fulltext-image.asp?format=htmlnonpaginated&src=9UYK50XPKNM2X8FY_html\" border="0" alt

candidates above background. For the decay channel

Spectra and correlations of ? and ? produced in 340-GeV/c S-+C and 260-GeV/c n+C interactions

\Xi^{--}(1860) \to \Xi^-\pi^-

A study of , and production in the hyperon beam experiment WA89 at CERN

and the kinematic range 0.15