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 0 s and \(\varLambda(\bar{\varLambda})\) production cross sections and their ratios are determined. K 0 s production is compared to the production of charged particles in the same region of phase space. The Λ– \(\bar{\varLambda}\) 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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Deceased.
Supported by the Bundesministerium für Bildung und Forschung, FRG, under contract numbers 05 H1 1GUA/1, 05 H1 1PAA/1, 05 H1 1PAB/9, 05 H1 1PEA/6, 05 H1 1VHA/7 and 05 H1 1VHB/5.
Supported by the UK Science and Technology Facilities Council, and formerly by the UK Particle Physics and Astronomy Research Council.
Supported by FNRS-FWO-Vlaanderen, IISN-IIKW and IWT and by Interuniversity Attraction Poles Programme, Belgian Science Policy.
Partially Supported by Polish Ministry of Science and Higher Education, grant PBS/DESY/70/2006 and grant N202 2956 33.
Supported by the Deutsche Forschungsgemeinschaft.
Supported by VEGA SR grant no. 2/7062/27.
Supported by the Swedish Natural Science Research Council.
Supported by the Ministry of Education of the Czech Republic under the projects LC527, INGO-1P05LA259 and MSM0021620859.
Supported by the Swiss National Science Foundation.
Supported by CONACYT, México, grant 48778-F.
This project is co-funded by the European Social Fund (75%) National Resources (25%)—(EPEAEK II)—PYTHAGORAS II.
Also at Physics Department, National Technical University, Zografou Campus, 15773 Athens, Greece.
Also at Rechenzentrum, Universität Wuppertal, Wuppertal, Germany.
Also at University of P.J. Šafárik, Košice, Slovak Republic.
Also at Comenius University, Bratislava, Slovak Republic.
Also at CERN, Geneva, Switzerland.
Also at Max-Planck-Institut für Physik, München, Germany.
Also at DESY and University Hamburg, Helmholtz Humboldt Research Award.
Also at Faculty of Physics, University of Bucharest, Bucharest, Romania.
Supported by a scholarship of the World Laboratory Björn Wiik Research Project.
Also at Ulaanbaatar University, Ulaanbaatar, Mongolia.
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H1 Collaboration., Aaron, F.D., Alexa, C. et al. Strangeness production at low Q 2 in deep-inelastic ep scattering at HERA. Eur. Phys. J. C 61, 185–205 (2009). https://doi.org/10.1140/epjc/s10052-009-0995-1
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DOI: https://doi.org/10.1140/epjc/s10052-009-0995-1