Scaled Momentum Distributions for K _S⁰ and ∧/∧ in DIS at HERA

Authors

H. Abramowicz, Tel Aviv University
I. Abt, Max Planck Institute for Physics (Werner Heisenberg Institute)
L. Adamczyk, AGH University of Science and Technology
M. Adamus, National Centre for Nuclear Research (NCBJ)
R. Aggarwal, Panjab University
S. Antonelli, Istituto Nazionale di Fisica Nucleare, Sezione di Bologna
P. Antonioli, Istituto Nazionale di Fisica Nucleare, Sezione di Bologna
A. Antonov, National Research Nuclear University MEPhI
M. Arneodo, Università degli Studi del Piemonte Orientale "Amedeo Avogadro"
V. Aushev, Institute of Nuclear Research, National Academy of Sciences in Ukraine
Y. Aushev, Taras Shevchenko National University of Kyiv
O. Bachynska, Deutsches Elektronen-Synchrotron (DESY)
A. Bamberger, Universität Freiburg im Breisgau
A. N. Barakbaev, Ministry of Education and Science of the Republic of Kazakhstan
G. Barbagli, Istituto Nazionale di Fisica Nucleare, Sezione di Firenze
G. Bari, Istituto Nazionale di Fisica Nucleare, Sezione di Bologna
F. Barreiro, Universidad Autónoma de Madrid
N. Bartosik, Taras Shevchenko National University of Kyiv
D. Bartsch, Universität Bonn
M. Basile, Istituto Nazionale di Fisica Nucleare, Sezione di Bologna
O. Behnke, Deutsches Elektronen-Synchrotron (DESY)
J. Behr, Deutsches Elektronen-Synchrotron (DESY)
U. Behrens, Deutsches Elektronen-Synchrotron (DESY)
L. Bellagamba, Istituto Nazionale di Fisica Nucleare, Sezione di BolognaFollow
A. Bertolin, Istituto Nazionale Di Fisica Nucleare, Sezione di Padova
S. Bhadra, York University
M. Bindi, Istituto Nazionale di Fisica Nucleare, Sezione di Bologna
C. Blohm, Deutsches Elektronen-Synchrotron (DESY)
V. Bokhonov, Institute of Nuclear Research, National Academy of Sciences in Ukraine
T. Bold, AGH University of Science and Technology
K. Bondarenko, Taras Shevchenko National University of Kyiv
Margarita C. K. Mattingly, Andrews UniversityFollow

Document Type

Article

Publication Date

4-13-2012

Keywords

Lepton-Nucleon Scattering

Abstract

Scaled momentum distributions for the strange hadrons K S0 and ∧/∧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 GeV 2 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. Nextto-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 K S0 and ∧/∧ strange hadrons. © SISSA 2012.

Journal Title

Journal of High Energy Physics

Volume

2012

Issue

3

DOI

https://doi.org/10.1007/JHEP03(2012)020

First Department

Physics

Recommended Citation

Abramowicz, H.; Abt, I.; Adamczyk, L.; Adamus, M.; Aggarwal, R.; Antonelli, S.; Antonioli, P.; Antonov, A.; Arneodo, M.; Aushev, V.; Aushev, Y.; Bachynska, O.; Bamberger, A.; Barakbaev, A. N.; Barbagli, G.; Bari, G.; Barreiro, F.; Bartosik, N.; Bartsch, D.; Basile, M.; Behnke, O.; Behr, J.; Behrens, U.; Bellagamba, L.; Bertolin, A.; Bhadra, S.; Bindi, M.; Blohm, C.; Bokhonov, V.; Bold, T.; Bondarenko, K.; and Mattingly, Margarita C. K., "Scaled Momentum Distributions for K _S⁰ and ∧/∧ in DIS at HERA" (2012). Faculty Publications. 1650.
https://digitalcommons.andrews.edu/pubs/1650

Acknowledgements

Retrieved January 29, 2021 from https://link.springer.com/article/10.1007/JHEP03(2012)020