Study of inclusive strange-baryon production and search for pentaquarks in two-photon collisions at LEP
2007
Measurements of inclusive production of the Λ, Ξ- and Ξ*(1530) baryons in two-photon collisions with the L3 detector at LEP are presented. The inclusive differential cross sections for Λ and Ξ- are measured as a function of the baryon transverse momentum, pt, and pseudo-rapidity, η. The mean number of Λ, Ξ- and Ξ*(1530) baryons per hadronic two-photon event is determined in the kinematic range 0.4 GeVpentaquark θ+(1540) in two-photon collisions through the decay θ+→pK0 S is also presented. No evidence for production of this state is found.
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