The production of the neutral strange hadrons K^0_S, Λ and antiΛ 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 (antiΛ) asymmetry and polarization have been measured in three kinematic regions: Q^2 > 25 GeV2; 5 < Q^2 < 25 GeV2; and in photoproduction (Q^2≃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.

Measurement of K^0_s, Lambda, Antilambda production at HERA

MONACO, Vincenzo;SACCHI, Roberto;SOLANO, Ada Maria;
2007-01-01

Abstract

The production of the neutral strange hadrons K^0_S, Λ and antiΛ 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 (antiΛ) asymmetry and polarization have been measured in three kinematic regions: Q^2 > 25 GeV2; 5 < Q^2 < 25 GeV2; and in photoproduction (Q^2≃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.
2007
51
1
23
http://dx.doi.org/10.1140/epjc/s10052-007-0299-2
High Energy Physics; HERA; ZEUS Collaboration
S. Chekanov;M. Derrick;S. Magill;S. Miglioranzi;B. Musgrave;D. Nicholass;J. Repond;R. Yoshida;M. C. K.;M. Jechow;N. Pavel;A. G. Y.;S. Antonelli;P. Ant...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/49159
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