Abramowicz, H;
Abt, I;
Adamczyk, L;
Adamus, M;
Aggarwal, R;
Antonelli, S;
Antonioli, P;
... Collaboration, ZEUS; + view all
(2012)
Scaled momentum distributions for K-S(0) and Λ /̄ Λ in DIS at HERA.
Journal of High Energy Physics
, 2012
(3)
, Article 20. 10.1007/JHEP03(2012)020.
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Abstract
Scaled momentum distributions for the strange hadrons K0S and Λ/Λ¯ were measured in deep inelastic ep scattering with the ZEUS detector at HERA using an integrated luminosity of 330 pb−1. The evolution of these distributions with the photon virtuality, Q 2, was studied in the kinematic region 10 < Q 2 < 40000 GeV2 and 0.001 < x < 0.75, where x is the Bjorken scaling variable. Clear scaling violations are observed. Predictions based on different approaches to fragmentation were compared to the measurements. Leading-logarithm parton-shower Monte Carlo calculations interfaced to the Lund string fragmentation model describe the data reasonably well in the whole range measured. Next-to-leading-order QCD calculations based on fragmentation functions, FFs, extracted from e + e − data alone, fail to describe the measurements. The calculations based on FFs extracted from a global analysis including e + e −, ep and pp data give an improved description. The measurements presented in this paper have the potential to further constrain the FFs of quarks, anti-quarks and gluons yielding K0S and Λ/Λ¯ strange hadrons.
| Type: | Article |
|---|---|
| Title: | Scaled momentum distributions for K-S(0) and Λ /̄ Λ in DIS at HERA |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1007/JHEP03(2012)020 |
| Publisher version: | http://dx.doi.org/10.1007/JHEP03(2012)020 |
| Language: | English |
| Additional information: | © 2012 The authors. This is an open-access article distributed under the terms of the Creative Commons Attribution License[http://creativecommons.org/licenses/by/4.0/], which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
| Keywords: | Lepton-Nucleon Scattering |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1353775 |
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