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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
physics and astronomy
Observation of the strange sea in the proton via inclusive φ-meson production in neutral current deep inelastic scattering at HERA
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Volume 553, No. 3-4, Year 2003
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Description
Inclusive φ(1020)-meson production in neutral current deep inelastic e+p scattering has been measured with the ZEUS detector at HERA using an integrated luminosity of 45 pb-1. The φ mesons were studied in the range 10 < Q2 < 100 GeV2, where Q2 is the virtuality of the exchanged photon, and in restricted kinematic regions in the transverse momentum, pT, pseudorapidity, η, and the scaled momentum in the Breit frame, xp. Monte Carlo models with the strangeness-suppression factor as determined by analyses of e+e- annihilation events overestimate the cross sections. A smaller value of the strangeness-suppression factor reduces the predicted cross sections, but fails to reproduce the shapes of the measured differential cross sections. High-momentum φ mesons in the current region of the Breit frame give the first direct evidence for the strange sea in the proton at low x. © 2002 Published by Elsevier Science B.V.
Authors & Co-Authors
Chekanov, Sergei V.
United States, Lemont
Argonne National Laboratory
Repond, José
United States, Lemont
Argonne National Laboratory
Antonioli, Pietro
Italy, Bologna
Istituto Nazionale Di Fisica Nucleare, Sezione Di Bologna
Basile, Maurizio
Italy, Bologna
Istituto Nazionale Di Fisica Nucleare, Sezione Di Bologna
Bellagamba, Lorenzo
Italy, Bologna
Istituto Nazionale Di Fisica Nucleare, Sezione Di Bologna
Contin, Andrea
Italy, Bologna
Istituto Nazionale Di Fisica Nucleare, Sezione Di Bologna
Margotti, Anselmo
Italy, Bologna
Istituto Nazionale Di Fisica Nucleare, Sezione Di Bologna
Palmonari, Federico M.
Italy, Bologna
Istituto Nazionale Di Fisica Nucleare, Sezione Di Bologna
Sartorelli, Gabriella
Italy, Bologna
Istituto Nazionale Di Fisica Nucleare, Sezione Di Bologna
Brock, Ian C.
Germany, Bonn
Universität Bonn
Kappes, Alexander
Germany, Bonn
Universität Bonn
Katz, Uli F.
Germany, Bonn
Universität Bonn
Paul, Ewald
Germany, Bonn
Universität Bonn
Stifutkin, Alexey Anatolyevich
Germany, Bonn
Universität Bonn
Bailey, David S.
United Kingdom, Bristol
University of Bristol
Foster, Brian
United Kingdom, Bristol
University of Bristol
Wing, Matthew
United Kingdom, Bristol
University of Bristol
Mellado, Bruce
United States, New York
Columbia University
Chwastowski, Janusz J.
Poland, Krakow
Henryk Niewodniczanski Institute of Nuclear Physics of the Polish Academy of Sciences
Adamczyk, Leszek
Poland, Krakow
Agh University of Krakow
Statistics
Citations: 15
Authors: 20
Affiliations: 16
Identifiers
Doi:
10.1016/S0370-2693(02)03206-9
ISSN:
03702693