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Article
Report number arXiv:2003.11791 ; CERN-EP-2020-041
Title Antiproton over proton and K$^-$ over K$^+$ multiplicity ratios at high $z$ in DIS
Related titleAntiproton over proton and K$^-$ over K$^+$ multiplicity ratios at high $z$ in DIS
Author(s)

Alexeev, G.D. (Dubna, JINR) ; Alexeev, M. G. (Turin U. ; INFN, Turin) ; Amoroso, A. (Turin U. ; INFN, Turin) ; Andrieux, V. (CERN ; Illinois U., Urbana) ; Anosov, V. (Dubna, JINR) ; Antoshkin, A. (Dubna, JINR) ; Augsten, K. (Dubna, JINR ; Prague, Tech. U.) ; Augustyniak, W. (NCBJ, Warsaw) ; Azevedo, C.D.R. (U. Aveiro (main)) ; Badelek, B. (Warsaw U.) ; Balestra, F. (Turin U. ; INFN, Turin) ; Ball, M. (Bonn U., HISKP) ; Barth, J. (Bonn U., HISKP) ; Beck, R. (Bonn U., HISKP) ; Bedfer, Y. (IRFU, Saclay) ; Berenguer Antequera, J. (Turin U. ; INFN, Turin) ; Bernhard, J. (Mainz U., Inst. Kernphys. ; CERN) ; Bodlak, M. (Charles U.) ; Bradamante, F. (INFN, Trieste) ; Bressan, A. (Trieste U. ; INFN, Trieste) ; Buechele, M. (Freiburg U.) ; Burtsev, V.E. (Tomsk Polytechnic U.) ; Chang, W.-C. (Taiwan, Inst. Phys.) ; Chatterjee, C. (Trieste U. ; INFN, Trieste) ; Chiosso, M. (Turin U. ; INFN, Turin) ; Chumakov, A.G. (Tomsk Polytechnic U.) ; Chung, S.-U. (Munich, Tech. U.) ; Cicuttin, A. (INFN, Trieste) ; Correia, P.M.M. (U. Aveiro (main)) ; Crespo, M.L. (INFN, Trieste) ; D'Ago, D. (Trieste U. ; INFN, Trieste) ; Dalla Torre, S. (INFN, Trieste) ; Dasgupta, S.S. (Matrivani Inst., Calcutta) ; Dasgupta, S. (INFN, Trieste) ; Denisenko, I. (Dubna, JINR) ; Denisov, O.Yu. (INFN, Turin) ; Donskov, S.V. (Kurchatov Inst., Moscow) ; Doshita, N. (Yamagata U.) ; Dreisbach, Ch. (Munich, Tech. U.) ; Duennweber, W. ; Dusaev, R.R. (Tomsk Polytechnic U.) ; Efremov, A. (Dubna, JINR) ; Eversheim, P.D. (Bonn U., HISKP) ; Faccioli, P. (LIP, Lisbon) ; Faessler, M. ; Finger, M. (Charles U.) ; Finger jr., M. (Charles U.) ; Fischer, H. (Freiburg U.) ; Franco, C. (LIP, Lisbon) ; Friedrich, J.M. (Munich, Tech. U.) ; Frolov, V. (Dubna, JINR ; CERN) ; Gautheron, F. (Ruhr U., Bochum, Inst. Expt. Phys. ; Illinois U., Urbana) ; Gavrichtchouk, O.P. (Dubna, JINR) ; Gerassimov, S. (Lebedev Inst. ; Munich, Tech. U.) ; Giarra, J. (Mainz U., Inst. Kernphys.) ; Gnesi, I. (Turin U. ; INFN, Turin) ; Gorzellik, M. (Freiburg U.) ; Grasso, A. (Turin U. ; INFN, Turin) ; Gridin, A. (Dubna, JINR) ; Grosse Perdekamp, M. (Illinois U., Urbana) ; Grube, B. (Munich, Tech. U.) ; Guskov, A. (Dubna, JINR) ; von Harrach, D. (Mainz U., Inst. Kernphys.) ; Heitz, R. (Illinois U., Urbana) ; Herrmann, F. (Freiburg U.) ; Horikawa, N. (Nagoya U.) ; d'Hose, N. (IRFU, Saclay) ; Hsieh, C.-Y. (Taiwan, Inst. Phys.) ; Huber, S. (Munich, Tech. U.) ; Ishimoto, S. (Yamagata U.) ; Ivanov, A. (Dubna, JINR) ; Iwata, T. (Yamagata U.) ; Jandek, M. (Prague, Tech. U.) ; Jary, T. (Prague, Tech. U.) ; Joosten, R. (Bonn U., HISKP) ; Joerg, P. (Freiburg U.) ; Kabuss, E. (Mainz U., Inst. Kernphys.) ; Kaspar, F. (Munich, Tech. U.) ; Kerbizi, A. (Trieste U. ; INFN, Trieste) ; Ketzer, B. (Bonn U., HISKP) ; Khaustov, G.V. (Kurchatov Inst., Moscow) ; Khokhlov, Yu.A. (Kurchatov Inst., Moscow) ; Kisselev, Yu. (Dubna, JINR) ; Klein, F. (Bonn U.) ; Koivuniemi, J.H. (Ruhr U., Bochum, Inst. Expt. Phys. ; Illinois U., Urbana) ; Kolosov, V.N. (Kurchatov Inst., Moscow) ; Kondo Horikawa, K. (Yamagata U.) ; Konorov, I. (Lebedev Inst. ; Munich, Tech. U.) ; Konstantinov, V.F. (Kurchatov Inst., Moscow) ; Kotzinian, A.M. (INFN, Turin) ; Kouznetsov, O.M. (Dubna, JINR) ; Koval, A. (NCBJ, Warsaw) ; Kral, Z. (Charles U.) ; Krinner, F. (Munich, Tech. U.) ; Kulinich, Y. (Illinois U., Urbana) ; Kunne, F. (IRFU, Saclay) ; Kurek, K. (NCBJ, Warsaw) ; Kurjata, R.P. (Warsaw U., Inst. Radioelect.) ; Kveton, A. (Charles U.) ; Lavickova, K. (Prague, Tech. U.) ; Levorato, S. (INFN, Trieste ; CERN) ; Lian, Y.-S. (Taiwan, Inst. Phys.) ; Lichtenstadt, J. (Tel Aviv U.) ; Lin, P.-J. (IRFU, Saclay) ; Longo, R. (Illinois U., Urbana) ; Lyubovitskij, V.E. (Tomsk Polytechnic U.) ; Maggiora, A. (INFN, Turin) ; Magnon, A. ; Makins, N. (Illinois U., Urbana) ; Makke, N. (INFN, Trieste) ; Mallot, G.K. (CERN ; Freiburg U.) ; Maltsev, A. (Dubna, JINR) ; Mamon, S.A. (Tomsk Polytechnic U.) ; Marianski, B. (NCBJ, Warsaw) ; Martin, A. (Trieste U. ; INFN, Trieste) ; Marzec, J. (Warsaw U., Inst. Radioelect.) ; Matousek, J. (Trieste U. ; INFN, Trieste) ; Matsuda, T. (Miyazaki U.) ; Mattson, G. (Illinois U., Urbana) ; Meshcheryakov, G.V. (Dubna, JINR) ; Meyer, M. (Illinois U., Urbana ; IRFU, Saclay) ; Meyer, W. (Ruhr U., Bochum, Inst. Expt. Phys.) ; Mikhailov, Yu.V. (Kurchatov Inst., Moscow) ; Mikhasenko, M. (Bonn U., HISKP ; CERN) ; Mitrofanov, E. (Dubna, JINR) ; Mitrofanov, N. (Dubna, JINR) ; Miyachi, Y. (Yamagata U.) ; Moretti, A. (Trieste U. ; INFN, Trieste) ; Nagaytsev, A. (Dubna, JINR) ; Naim, C. (IRFU, Saclay) ; Neyret, D. (IRFU, Saclay) ; Novy, J. (Prague, Tech. U.) ; Nowak, W.-D. (Mainz U., Inst. Kernphys.) ; Nukazuka, G. (Yamagata U.) ; Nunes, A.S. (LIP, Lisbon) ; Olshevskiy, A.G. (Dubna, JINR) ; Ostrick, M. (Mainz U., Inst. Kernphys.) ; Panzieri, D. (INFN, Turin) ; Parsamyan, B. (Turin U. ; INFN, Turin) ; Paul, S. (Munich, Tech. U.) ; Pekeler, H. (Bonn U., HISKP) ; Peng, J.-C. (Illinois U., Urbana) ; Pesek, M. (Charles U.) ; Peshekhonov, D.V. (Dubna, JINR) ; Peskova, M. (Charles U.) ; Pierre, N. (Mainz U., Inst. Kernphys. ; IRFU, Saclay) ; Platchkov, S. (IRFU, Saclay) ; Pochodzalla, J. (Mainz U., Inst. Kernphys.) ; Polyakov, V.A. (Kurchatov Inst., Moscow) ; Pretz, J. (Bonn U.) ; Quaresma, M. (Taiwan, Inst. Phys. ; LIP, Lisbon) ; Quintans, C. (LIP, Lisbon) ; Reicherz, G. (Ruhr U., Bochum, Inst. Expt. Phys.) ; Riedl, C. (Illinois U., Urbana) ; Rudnicki, T. (Warsaw U.) ; Ryabchikov, D.I. (Kurchatov Inst., Moscow ; Munich, Tech. U.) ; Rybnikov, A. (Dubna, JINR) ; Rychter, A. (Warsaw U., Inst. Radioelect.) ; Samoylenko, V.D. (Kurchatov Inst., Moscow) ; Sandacz, A. (NCBJ, Warsaw) ; Sarkar, S. (Matrivani Inst., Calcutta) ; Savin, I.A. (Dubna, JINR) ; Sbrizzai, G. (INFN, Trieste) ; Schmieden, H. (Bonn U.) ; Selyunin, A. (Dubna, JINR) ; Sinha, L. (Matrivani Inst., Calcutta) ; Slunecka, M. (Dubna, JINR ; Charles U.) ; Smolik, J. (Dubna, JINR) ; Srnka, A. (Inst. Sci. Instruments, Brno) ; Steffen, D. (CERN ; Munich, Tech. U.) ; Stolarski, M. (LIP, Lisbon) ; Subrt, O. (CERN ; Prague, Tech. U.) ; Sulc, M. (Liberec Tech. U.) ; Suzuki, H. (Yamagata U.) ; Sznajder, P. (NCBJ, Warsaw) ; Tessaro, S. (INFN, Trieste) ; Tessarotto, F. (INFN, Trieste ; CERN) ; Thiel, A. (Bonn U., HISKP) ; Tomsa, J. (Charles U.) ; Tosello, F. (INFN, Turin) ; Townsend, A. (Illinois U., Urbana) ; Tskhay, V. (Lebedev Inst.) ; Uhl, S. (Munich, Tech. U.) ; Vasilishin, B.I. (Tomsk Polytechnic U.) ; Vauth, A. (Bonn U. ; CERN) ; Veit, B.M. (Mainz U., Inst. Kernphys. ; CERN) ; Veloso, J. (U. Aveiro (main)) ; Ventura, B. (IRFU, Saclay) ; Vidon, A. (IRFU, Saclay) ; Virius, M. (Prague, Tech. U.) ; Wagner, M. (Bonn U., HISKP) ; Wallner, S. (Munich, Tech. U.) ; Zaremba, K. (Warsaw U., Inst. Radioelect.) ; Zavada, P. (Dubna, JINR) ; Zavertyaev, M. (Lebedev Inst.) ; Zemko, M. (Charles U.) ; Zemlyanichkina, E. (Dubna, JINR) ; Zhao, Y. (INFN, Trieste) ; Ziembicki, M. (Warsaw U., Inst. Radioelect.)

Corporate author(s) The COMPASS collaboration
Publication 2020-07-02
Imprint 20 Mar 2020
Number of pages 19
Note 19 pages, 7 figures, 3 tables
Published in: Phys. Lett. B 807 (2020) 135600
DOI 10.1016/j.physletb.2020.135600
Subject category Particle Physics - Experiment ; hep-ex
Accelerator/Facility, Experiment CERN SPS ; COMPASS
Keywords QCD ; experimental results ; SIDIS ; Multiplicities ; Kaon ; Antiproton
Abstract The $\bar{\rm p} $ over p multiplicity ratio is measured in deep-inelastic scattering for the first time using (anti-) protons carrying a large fraction of the virtual-photon energy, $z>0.5$. The data were obtained by the COMPASS Collaboration using a 160 GeV muon beam impinging on an isoscalar $^6$LiD target. The regime of deep-inelastic scattering is ensured by requiring $Q^2$ > 1 (GeV/$c$)$^2$ for the photon virtuality and $W > 5$ GeV/$c^2$ for the invariant mass of the produced hadronic system. The range in Bjorken-$x$ is restricted to $0.01 < x < 0.40$. Protons and antiprotons are identified in the momentum range $20 \div 60$ GeV/$c$. In the whole studied $z$-region, the $\bar{\rm p}$ over p multiplicity ratio is found to be below the lower limit expected from calculations based on leading-order perturbative Quantum Chromodynamics (pQCD). Extending our earlier analysis of the K$^-$ over K$^+$ multiplicity ratio by including now events with larger virtual-photon energies, this ratio becomes closer to the expectation of next-to-leading order pQCD. The results of both analyses strengthen our earlier conclusion that the phase space available for hadronisation should be taken into account in the pQCD formalism.
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Copyright/License publication: © 2020 Published by Elsevier B.V. (License: CC-BY-4.0), sponsored by SCOAP³
preprint: © 2020-2024 CERN (License: arXiv nonexclusive-distrib 1.0)
Submitted by oleg.denisov@cern.ch



 


 Record created 2020-03-20, last modified 2024-07-20


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