Abstract
Scaled momentum distributions for the strange hadrons \( K_{\text{S}}^0 \) and \( \Lambda /\bar{\Lambda } \) 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 \( K_{\text{S}}^0 \) and \( \Lambda /\bar{\Lambda } \) strange hadrons.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
B. Andersson, G. Gustafson, G. Ingelman and T. Sjöstrand, Parton fragmentation and string dynamics, Phys. Rept. 97 (1983) 31 [INSPIRE].
G. Altarelli, R. Ellis, G. Martinelli and S.-Y. Pi, Processes involving fragmentation functions beyond the leading order in QCD, Nucl. Phys. B 160 (1979) 301 [INSPIRE].
W. Furmanski and R. Petronzio, Lepton-hadron processes beyond leading order in quantum chromodynamics, Z. Phys. C 11 (1982) 293 [INSPIRE].
P. Nason and B. Webber, Scaling violation in e + e − fragmentation functions: QCD evolution, hadronization and heavy quark mass effects, Nucl. Phys. B 421 (1994) 473 [Erratum ibid. B 480 (1996)755] [INSPIRE].
J.C. Collins and D.E. Soper, Back-to-back jets in QCD, Nucl. Phys. B 193 (1981) 381 [Erratum ibid. B 213 (1983) 545] [INSPIRE].
J.C. Collins and D.E. Soper, Parton distribution and decay functions, Nucl. Phys. B 194 (1982) 445 [INSPIRE].
ALEPH collaboration, R. Barate et al., Studies of quantum chromodynamics with the ALEPH detector, Phys. Rept. 294 (1998) 1 [INSPIRE].
ALEPH collaboration, A. Heister et al., Studies of QCD at e + e − centre-of-mass energies between 91 GeV and 209 GeV, Eur. Phys. J. C 35 (2004) 457 [INSPIRE].
AMY collaboration, Y. Li et al., Multi-hadron event properties in e + e − annihilation at \( \sqrt {s} = {52}\;GeV \) to 57GeV, Phys. Rev. D 41(1990) 2675 [INSPIRE].
DELPHI collaboration, P. Abreu et al., π± , K ± , p and p production in Z 0 → q q, Z 0 → bb, Z 0 →uu, d, ss, Eur. Phys. J. C 5 (1998) 585 [INSPIRE].
DELPHI collaboration, P. Abreu et al., Energy dependence of inclusive spectra in e + e − annihilation, Phys. Lett. B 459 (1999) 397 [INSPIRE].
DELPHI collaboration, P. Abreu et al., Charged and identified particles in the hadronic decay of W bosons and in e + e − → q q from 130 GeV to 200 GeV, Eur. Phys. J. C 18 (2000) 203 [Erratum ibid. C 25 (2002) 493] [hep-ex/0103031] [INSPIRE].
DELPHI collaboration, J. Abdallah et al., Study of leading hadrons in gluon and quark fragmentation, Phys. Lett. B 643 (2006) 147 [hep-ex/0610031] [INSPIRE].
L3 collaboration, P. Achard et al., Studies of hadronic event structure in e + e − annihilation from 30 GeV to 209 GeV with the L3 detector, Phys. Rept. 399 (2004) 71 [hep-ex/0406049] [INSPIRE].
MARK II collaboration, A. Petersen et al., Multi-hadronic events at E c.m. = 29 GeV and predictions of QCD models from E c.m. = 29 GeV to E c.m. = 93 GeV, Phys. Rev. D 37 (1988) 1 [INSPIRE].
OPAL collaboration, G. Alexander et al., QCD studies with e + e − annihilation data at 130 GeV and 136 GeV, Z. Phys. C 72 (1996) 191 [INSPIRE].
OPAL collaboration, G. Abbiendi et al., Leading particle production in light flavor jets, Eur. Phys. J. C 16 (2000) 407 [hep-ex/0001054] [INSPIRE].
TASSO collaboration, W. Braunschweig et al., Global jet properties at 14 GeV to 44 GeV center-of-mass energy in e + e − annihilation, Z. Phys. C 47 (1990) 187 [INSPIRE].
DELPHI collaboration, P. Abreu et al., Determination of αs from the scaling violation in the fragmentation functions in e + e − annihilation, Phys. Lett. B 311 (1993) 408 [INSPIRE].
BRAHMS collaboration, I. Arsene et al., Production of mesons and baryons at high rapidity and high p T in proton-proton collisions at \( \sqrt {s} = {2}00\;GeV \), Phys. Rev. Lett. 98 (2007) 252001 [hep-ex/0701041] [INSPIRE].
PHENIX collaboration, S. Adler et al., Mid-rapidity neutral pion production in proton proton collisions at \( \sqrt {s} = {2}00\;GeV \), Phys. Rev. Lett. 91 (2003) 241803 [hep-ex/0304038] [INSPIRE].
STAR collaboration, J. Adams et al., Forward neutral pion production in p + p and d + Au collisions at \( \sqrt {{{s_{N\;N}}}} = {2}00\;GeV \), Phys. Rev. Lett. 97 (2006) 152302 [nucl-ex/0602011] [INSPIRE].
STAR collaboration, B. Abelev et al., Strange particle production in p + p collisions at \( \sqrt {s} = {2}00\;GeV \), Phys. Rev. C 75(2007) 064901 [nucl-x/0607033][INSPIRE].
CDF collaboration, D. Acosta et al., \( K_S^0 \) and Λ0 production studies in pp collisions at \( \sqrt {\text{s}} = {18}00\;GeV \) and 630 GeV, Phys. Rev. D 72 (2005) 052001 [hep-ex/0504048] [INSPIRE].
ZEUS collaboration, M. Derrick et al., Measurement of multiplicity and momentum spectra in the current fragmentation region of the Breit frame at HERA, Z. Phys. C 67 (1995) 93 [hep-ex/9501012] [INSPIRE].
ZEUS collaboration, J. Breitweg et al., Observation of scaling violations in scaled momentum distributions at HERA, Phys. Lett. B 414 (1997) 428 [hep-ex/9710011] [INSPIRE].
ZEUS collaboration, J. Breitweg et al., Measurement of multiplicity and momentum spectra in the current and target regions of the Breit frame in deep inelastic scattering at HERA, Eur. Phys. J. C 11 (1999) 251 [hep-ex/9903056] [INSPIRE].
ZEUS collaboration, H. Abramowicz et al., Scaled momentum spectra in deep inelastic scattering at HERA, JHEP 06 (2010) 009 [Erratum ibid. 10 (2010) 030] [arXiv:1001.4026] [INSPIRE].
H1 collaboration, F. Aaron et al., Charged particle production in high Q 2 deep-inelastic scattering at HERA, Phys. Lett. B 654 (2007) 148 [arXiv:0706.2456] [INSPIRE].
H1 collaboration, S. Aid et al., A study of the fragmentation of quarks in e − p collisions at HERA, Nucl. Phys. B 445 (1995) 3 [hep-ex/9505003] [INSPIRE].
H1 collaboration, C. Adloff et al., Evolution of ep fragmentation and multiplicity distributions in the Breit frame, Nucl. Phys. B 504 (1997) 3 [hep-ex/9707005] [INSPIRE].
H1 collaboration, F. Aaron et al., Observation of the hadronic final state charge asymmetry in high Q 2 deep-inelastic scattering at HERA, Phys. Lett. B 681 (2009) 125 [arXiv:0907.2666] [INSPIRE].
H1 collaboration, F. Aaron et al., Strangeness production at low Q 2 in deep-inelastic ep scattering at HERA, Eur. Phys. J. C 61 (2009) 185 [arXiv:0810.4036] [INSPIRE].
S. Kretzer, Fragmentation functions from flavor inclusive and flavor tagged e + e − annihilations, Phys. Rev. D 62 (2000) 054001 [hep-ph/0003177] [INSPIRE].
B.A. Kniehl, G. Kramer and B. Pötter, Strong coupling constant from scaling violations in fragmentation functions, Phys. Rev. Lett. 85 (2000) 5288 [hep-ph/0003297] [INSPIRE].
S. Albino, B. Kniehl, G. Kramer and C. Sandoval, Confronting fragmentation function universality with single hadron inclusive production at HERA and e + e − colliders, Phys. Rev. D 75 (2007) 034018 [hep-ph/0611029] [INSPIRE].
S. Albino, B. Kniehl and G. Kramer, AKK update: improvements from new theoretical input and experimental data, Nucl. Phys. B 803 (2008) 42 [arXiv:0803.2768] [INSPIRE].
D. de Florian, R. Sassot and M. Stratmann, Global analysis of fragmentation functions for pions and kaons and their uncertainties, Phys. Rev. D 75 (2007) 114010 [hep-ph/0703242] [INSPIRE].
D. de Florian, R. Sassot and M. Stratmann, Global analysis of fragmentation functions for protons and charged hadrons, Phys. Rev. D 76 (2007) 074033 [arXiv:0707.1506] [INSPIRE].
S. Albino, B. Kniehl and G. Kramer, Fragmentation functions for K S and Λ with complete quark flavor separation, Nucl. Phys. B 734 (2006) 50 [hep-ph/0510173] [INSPIRE].
F. Arleo, (Medium-modified) fragmentation functions, Eur. Phys. J. C 61 (2009) 603 [arXiv:0810.1193] [INSPIRE].
R.P. Feynman, Photon-hadron interactions, Benjamin, New York U.S.A. (1972).
K. Streng, T. Walsh and P. Zerwas, Quark and gluon jets in the Breit frame of lepton-nucleon scattering, Z. Phys. C 2 (1979) 237 [INSPIRE].
A. Hillenbrand, Measurement and simulation of the fragmentation process at HERMES, Ph.D. thesis, report DESY-THESIS-2005-035, Erlangen University, Erlangen Germany (2005) [ISSN:1435-8085] [INSPIRE].
ZEUS collaboration, M. Derrick et al., A measurement of σtot(γp) at \( \sqrt {s} = {21}0\;GeV \), Phys. Lett. B 293 (1992) 465 [INSPIRE].
ZEUS collaboration, U. Holm ed., The ZEUS detector, status report, unpublished, available on http://www-zeus.desy.de/bluebook/bluebook.html, DESY, Germany (1993).
N. Harnew et al., Vertex triggering using time difference measurements in the ZEUS central tracking detector, Nucl. Instrum. Meth. A 279 (1989) 290 [INSPIRE].
B. Foster et al., The performance of the ZEUS central tracking detector z-by-timing electronics in a transputer based data acquisition system, Nucl. Phys. Proc. Suppl. B 32 (1993) 181 [INSPIRE].
B. Foster et al., The design and construction of the ZEUS central tracking detector, Nucl. Instrum. Meth. A 338 (1994) 254 [INSPIRE].
A. Polini et al., The design and performance of the ZEUS micro vertex detector, Nucl. Instrum. Meth. A 581 (2007) 656 [arXiv:0708.3011] [INSPIRE].
S. Fourletov et al., Straw Tube Tracking detector (STT) for ZEUS, Nucl. Instrum. Meth. A 535 (2004) 191 [INSPIRE].
M. Derrick et al., Design and construction of the ZEUS barrel calorimeter, Nucl. Instrum. Meth. A 309 (1991) 77 [INSPIRE].
A. Andresen et al., Construction and beam test of the ZEUS forward and rear calorimeter, Nucl. Instrum. Meth. A 309 (1991) 101 [INSPIRE].
A. Caldwell et al., Design and implementation of a high precision readout system for the ZEUS calorimeter, Nucl. Instrum. Meth. A 321 (1992) 356 [INSPIRE].
A. Bernstein et al., Beam tests of the ZEUS barrel calorimeter, Nucl. Instrum. Meth. A 336 (1993) 23 [INSPIRE].
ZEUS collaboration, S. Chekanov et al., Measurement of the neutral current cross-section and F 2 structure function for deep inelastic e + p scattering at HERA, Eur. Phys. J. C 21 (2001) 443 [hep-ex/0105090] [INSPIRE].
A. Bamberger et al., The small angle rear tracking detector of ZEUS, Nucl. Instrum. Meth. A 401 (1997) 63 [INSPIRE].
A. Bamberger et al., The presampler for the forward and rear calorimeter in the ZEUS detector, Nucl. Instrum. Meth. A 382 (1996) 419 [hep-ex/9609006] [INSPIRE].
J. Andruszków et al., First measurement of HERA luminosity by ZEUS lumi monitor, preprint DESY-92-066, DESY, Germany (1992) [INSPIRE].
ZEUS collaboration, M. Derrick et al., Measurement of total and partial photon proton cross-sections at 180 GeV center-of-mass energy, Z. Phys. C 63 (1994) 391 [INSPIRE].
J. Andruszków et al., Luminosity measurement in the ZEUS experiment, Acta Phys. Polon. B 32 (2001) 2025 [INSPIRE].
M. Helbich et al., The spectrometer system for measuring ZEUS luminosity at HERA, Nucl. Instrum. Meth. A 565 (2006) 572 [physics/0512153] [INSPIRE].
W.H. Smith, K. Tokushuku and L.W. Wiggers, The ZEUS trigger system, in Proc. Computing in High-Energy Physics (CHEP), Annecy, France, Sept. 1992, C. Verkerk and W. Wojcik eds., CERN, Geneva Switzerland (1992), pg. 222 [DESY-92-150B] [INSPIRE].
H. Abramowicz, A. Caldwell and R. Sinkus, Neural network based electron identification in the ZEUS calorimeter, Nucl. Instrum. Meth. A 365 (1995) 508 [hep-ex/9505004] [INSPIRE].
S. Bentvelsen, J. Engelen and P. Kooijman, Reconstruction of (x, Q 2) and extraction of structure functions in neutral current scattering at HERA, in Proc. of the Workshop on Physics at HERA, volume 1, W. Buchmüller and G. Ingelman eds., DESY, Hamburg Germany (1992), pg. 23 [INSPIRE].
F. Jacquet and A. Blondel, Detection of the charged current event — method II, in Proc. of the Study for an ep Facility for Europe, U. Amaldi ed., Hamburg Germany (1979), pg. 391 [DESY-79-48] [INSPIRE].
ZEUS collaboration, S. Chekanov et al., Bose-Einstein correlations of charged and neutral kaons in deep inelastic scattering at HERA, Phys. Lett. B 652 (2007) 1 [arXiv:0706.2538] [INSPIRE].
J. Podolanski and R. Armenteros, Analysis of V-events, Phil. Mag. 45 (1954) 13.
R. Brun et al., Geant3, technical report CERN-DD-EE-84-1, CERN, Geneva Switzerland (1987) [INSPIRE].
G. Ingelman, A. Edin and J. Rathsman, LEPTO 6.5: a Monte Carlo generator for deep inelastic lepton-nucleon scattering, Comput. Phys. Commun. 101 (1997) 108 [hep-ph/9605286] [INSPIRE].
A. Kwiatkowski, H. Spiesberger and H. Möhring, HERACLES: an event generator for ep interactions at HERA energies including radiative processes: version 1.0, Comput. Phys. Commun. 69 (1992) 155 [INSPIRE].
H. Spiesberger, An event generator for ep interactions at HERA including radiative processes (version 4.6), available on http://www.desy.de/~hspiesb/heracles.html, DESY, Germany (1996).
K. Charchula, G. Schuler and H. Spiesberger, Combined QED and QCD radiative effects in deep inelastic lepton-proton scattering: the Monte Carlo generator DJANGO6, Comput. Phys. Commun. 81 (1994) 381 [INSPIRE].
H. Spiesberger, heracles and djangoh: event generation for ep interactions at HERA including radiative processes, available on http://wwwthep.physik.uni-mainz.de/~hspiesb/djangoh/djangoh.html, DESY, Germany (1998).
Y.I. Azimov, Y.L. Dokshitzer, V.A. Khoze and S. Troian, The string effect and QCD coherence, Phys. Lett. B 165 (1985) 147 [INSPIRE].
G. Gustafson, Dual description of a confined color field, Phys. Lett. B 175 (1986) 453 [INSPIRE].
G. Gustafson and U. Pettersson, Dipole formulation of QCD cascades, Nucl. Phys. B 306 (1988) 746 [INSPIRE].
B. Andersson, G. Gustafson, L. Lönnblad and U. Pettersson, Coherence effects in deep inelastic scattering, Z. Phys. C 43 (1989) 625 [INSPIRE].
L. Lönnblad, ARIADNE version 4: a program for simulation of QCD cascades implementing the color dipole model, Comput. Phys. Commun. 71 (1992) 15 [INSPIRE].
L. Lönnblad, Rapidity gaps and other final state properties in the color dipole model for deep inelastic scattering, Z. Phys. C 65 (1995) 285 [INSPIRE].
T. Sjöstrand, High-energy physics event generation with PYTHIA 5.7 and JETSET 7.4, Comput. Phys. Commun. 82 (1994) 74 [INSPIRE].
T. Sjöstrand et al., High-energy physics event generation with PYTHIA 6.1, Comput. Phys. Commun. 135 (2001) 238 [hep-ph/0010017] [INSPIRE].
T. Sjöstrand, The Lund Monte Carlo for jet fragmentation and e + e − physics: JETSET version 6.2, Comput. Phys. Commun. 39 (1986) 347 [INSPIRE].
T. Sjöstrand and M. Bengtsson, The Lund Monte Carlo for jet fragmentation and e + e − physics. JETSET version 6.3: an update, Comput. Phys. Commun. 43 (1987) 367 [INSPIRE].
European Muon collaboration, M. Arneodo et al., Comparison between hadronic final states produced in μp and e + e − interactions, Z. Phys. C 35 (1987) 417 [INSPIRE].
CTEQ collaboration, H. Lai et al., Global QCD analysis of parton structure of the nucleon: CTEQ5 parton distributions, Eur. Phys. J. C 12 (2000) 375 [hep-ph/9903282] [INSPIRE].
D. Graudenz, Charged meson production and scaling violations of fragmentation functions in deeply inelastic scattering at HERA, Phys. Lett. B 406 (1997) 178 [hep-ph/9606470] [INSPIRE].
J. Pumplin et al., New generation of parton distributions with uncertainties from global QCD analysis, JHEP 07 (2002) 012 [hep-ph/0201195] [INSPIRE].
S. Albino, B. Kniehl, G. Kramer and W. Ochs, Generalizing the DGLAP evolution of fragmentation functions to the smallest x values, Phys. Rev. Lett. 95 (2005) 232002 [hep-ph/0503170] [INSPIRE].
A. Martin, R. Roberts, W. Stirling and R. Thorne, NNLO global parton analysis, Phys. Lett. B 531 (2002) 216 [hep-ph/0201127] [INSPIRE].
R. Sassot, private communication.
Author information
Authors and Affiliations
Consortia
Additional information
ArXiv ePrint: 1111.3526
Deceased (B. A. Dolgoshein, P. F. Ermolov, A. Eskreys)
supported by the US Department of Energy. (Argonne National Laboratory, Argonne, Illinois 60439-4815, U.S.A; Physics Department, Ohio State University, Columbus, Ohio 43210, U.S.A; Department of Physics, University of Wisconsin, Madison, Wisconsin 53706, U.S.A)
supported by the Italian National Institute for Nuclear Physics (INFN). (INFN Bologna, Bologna, Italy; University and INFN Bologna, Bologna, Italy; Calabria University, Physics Department and INFN, Cosenza, Italy; INFN Florence, Florence, Italy; INFN Padova, Padova, Italy; Dipartimento di Fisica dell’ Università and INFN, Padova, Italy; Dipartimento di Fisica, Università ’La Sapienza’ and INFN, Rome, Italy; Università di Torino and INFN, Torino, Italy; Università del Piemonte Orientale, Novara, and INFN, Torino, Italy)
supported by the German Federal Ministry for Education and Research (BMBF), under contract No. 05 H09PDF. (Physikalisches Institut der Universität Bonn, Bonn, Germany)
supported by the Science and Technology Facilities Council, UK. (H.H. Wills Physics Laboratory, University of Bristol, Bristol, U.K; School of Physics and Astronomy, University of Glasgow, Glasgow, U.K; Imperial College London, High Energy Nuclear Physics Group, London, U.K; Department of Physics, University of Oxford, Oxford, U.K; Rutherford Appleton Laboratory, Chilton, Didcot, Oxon, U.K)
supported by an FRGS grant from the Malaysian government. (Jabatan Fizik, Universiti Malaya, 50603 Kuala Lumpur, Malaysia)
supported by the US National Science Foundation. Any opinion, findings and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation. (Nevis Laboratories, Columbia University, Irvington on Hudson, New York 10027, U.S.A; Department of Physics, Pennsylvania State University, University Park, Pennsylvania 16802, U.S.A)
supported by the Polish Ministry of Science and Higher Education as a scientific project No. DPN/N188/DESY/2009. (The Henryk Niewodniczanski Institute of Nuclear Physics, Polish Academy of Sciences, Krakow, Poland)
supported by the Polish Ministry of Science and Higher Education and its grants for Scientific Research. (AGH-University of Science and Technology, Faculty of Physics and Applied Computer Science, Krakow, Poland)
supported by the German Federal Ministry for Education and Research (BMBF), under contract No. 05h09GUF, and the SFB 676 of the Deutsche Forschungsgemeinschaft (DFG). (Hamburg University, Institute of Experimental Physics, Hamburg, Germany)
supported by the Japanese Ministry of Education, Culture, Sports, Science and Technology (MEXT) and its grants for Scientific Research. (Institute of Particle and Nuclear Studies, KEK, Tsukuba, Japan; Meiji Gakuin University, Faculty of General Education, Yokohama, Japan; Polytechnic University, Sagamihara, Japan; Department of Physics, Tokyo Institute of Technology, Tokyo, Japan; Department of Physics, University of Tokyo, Tokyo, Japan; Tokyo Metropolitan University, Department of Physics, Tokyo, Japan)
supported by the Korean Ministry of Education and Korea Science and Engineering Foundation. (Kyungpook National University, Center for High Energy Physics, Daegu, South Korea)
supported by FNRS and its associated funds (IISN and FRIA) and by an Inter-University Attraction Poles Programme subsidised by the Belgian Federal Science Policy Office. (Institut de Physique Nucléaire, Université Catholique de Louvain, Louvain-la-Neuve, Belgium)
supported by the Spanish Ministry of Education and Science through funds provided by CICYT. (Departamento de F´ısica Teórica, Universidad Autónoma de Madrid, Madrid, Spain)
supported by the Natural Sciences and Engineering Research Council of Canada (NSERC). (Department of Physics, McGill University, Montréal, Québec, Canada H3A 2T8; Department of Physics, University of Toronto, Toronto, Ontario, Canada M5S 1A7; Department of Physics, York University, Ontario, Canada M3J 1P3)
partially supported by the German Federal Ministry for Education and Research (BMBF). (Moscow Engineering Physics Institute, Moscow, Russia)
supported by RF Presidential grant N 4142.2010.2 for Leading Scientific Schools, by the Russian Ministry of Education and Science through its grant for Scientific Research on High Energy Physics and under contract No.02.740.11.0244. (Moscow State University, Institute of Nuclear Physics, Moscow, Russia)
supported by the Netherlands Foundation for Research on Matter (FOM). (NIKHEF and University of Amsterdam, Amsterdam, Netherlands)
supported by the Israel Science Foundation. (Raymond and Beverly Sackler Faculty of Exact Sciences, School of Physics, Tel Aviv University, Tel Aviv, Israel)
also funded by Max Planck Institute for Physics, Munich, Germany. (R. Aggarwal, P. Kaur, I. Singh)
supported by the research grant No. 1 P03B 04529 (2005-2008). (A. Kotanski)
now at DESY group FS-CFEL-1. (N. Coppola)
partially supported by Warsaw University, Poland. (J. Tomaszewska)
supported by DESY, Germany. (V. Aushev, Y. Aushev, V. Bokhonov, N. Zhmak)
member of National Technical University of Ukraine, Kyiv Polytechnic Institute, Kyiv, Ukraine. (Y. Aushev)
member of National University of Kyiv - Mohyla Academy, Kyiv, Ukraine. (N. Bartosik)
partly supported by the Russian Foundation for Basic Research, grant 11-02-91345-DFG_a. (L. K. Gladilin, I. A. Korzhavina)
Alexander von Humboldt Professor; also at DESY and University of Oxford. (B. Foster)
STFC Advanced Fellow. (C. Gwenlan)
nee Korcsak-Gorzo. (K. Horton)
This material was based on work supported by the National Science Foundation, while working at the Foundation. (J. J. Whitmore)
member of Lódz University, Poland. (W. Perlanski)
Max Planck Institute for Physics, Munich, Germany, External Scientific Member. (H. Abramowicz)
Rights and permissions
Open Access This article is distributed under the terms of the Creative Commons Attribution 2.0 International License ( https://creativecommons.org/licenses/by/2.0 ), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
About this article
Cite this article
The ZEUS collaboration., Abramowicz, H., Abt, I. et al. Scaled momentum distributions for \( K_S^0 \)KS and \( \Lambda /\bar{\Lambda } \) in DIS at HERA. J. High Energ. Phys. 2012, 20 (2012). https://doi.org/10.1007/JHEP03(2012)020
Received:
Revised:
Accepted:
Published:
DOI: https://doi.org/10.1007/JHEP03(2012)020