Measurement of K0S, Λ, Λˉ production at HERAстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:The production of the neutral strange hadrons K0S, Λ and Λˉ has been measured in ep collisions at HERA using the ZEUS detector. Cross sections, baryon-to-meson ratios, relative yields of strange and charged light hadrons, Λ (Λˉ) asymmetry and polarization have been measured in three kinematic regions: Q2>25\gev2; 5 < Q^2 < 25 \gev^2; and in photoproduction (Q2≃0). In photoproduction the presence of two hadronic jets, each with at least 5\gev transverse energy, was required. The measurements agree in general with Monte Carlo models and are consistent with measurements made at e+e− colliders, except for an enhancement of baryon relative to meson production in photoproduction.