Article

Strangeness production at low Q2 in deep-inelastic ep scattering at HERA

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Bergische Universität Wuppertal, Wuppertal, North Rhine-Westphalia, Germany
(Impact Factor: 5.08). 10/2008; 61(2):185-205. DOI: 10.1140/epjc/s10052-009-0995-1

ABSTRACT

The production of neutral strange hadrons is investigated using deep-inelastic scattering events measured with the H1 detector
at HERA. The measurements are made in the phase space defined by the negative four-momentum transfer squared of the photon
2<Q
2<100 GeV2 and the inelasticity 0.1<y<0.6. The K

s
0 and

\varLambda([\varLambda])\varLambda(\bar{\varLambda})
production cross sections and their ratios are determined. K

s
0 production is compared to the production of charged particles in the same region of phase space. The Λ–

[\varLambda]\bar{\varLambda}
asymmetry is also measured and found to be consistent with zero. Predictions of leading order Monte Carlo programs are compared
to the data.

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ABSTRACT: The production of neutral strange hadrons has been studied in deep inelastic ep pro- cesses at low Q2 at HERA using events measured with the H1 detector. The production cross sections and ratios of the K 0s , ∧(∧) and charged hadrons h± are measured as a function of DIS variables and of final state particle variables both in the laboratory and in the Breit frame. The measurement of the∧-∧asymmetry is found to be consistent with zero. The data are compared to predictions of leading order Monte Carlo models.
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