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Article
Report number arXiv:1802.00584 ; CERN-EP-2018-012
Title K$^{-}$ over K$^{+}$ multiplicity ratio for kaons produced in DIS with a large fraction of the virtual-photon energy
Related titleK$^{-}$ over K$^{+}$ multiplicity ratio for kaons produced in DIS with a large fraction of the virtual-photon energy
Author(s)

Akhunzyanov, R. (Dubna, JINR) ; Alexeev, M.G. (Turin U.) ; Alexeev, G.D. (Dubna, JINR) ; Amoroso, A. (Turin U. ; INFN, Turin) ; Andrieux, V. (Illinois U., Urbana ; IRFU, Saclay) ; Anfimov, N.V. (Dubna, JINR) ; Anosov, V. (Dubna, JINR) ; Antoshkin, A. (Dubna, JINR) ; Augsten, K. (Dubna, JINR ; CTU, Prague) ; Augustyniak, W. (NCBJ, Swierk) ; Austregesilo, A. (Munich, Tech. U.) ; Azevedo, C.D.R. (Aveiro U.) ; Badełek, B. (Warsaw U.) ; Balestra, F. (Turin U. ; INFN, Turin) ; Ball, M. (Bonn U., HISKP) ; Barth, J. (Bonn U.) ; Beck, R. (Bonn U., HISKP) ; Bedfer, Y. (IRFU, Saclay) ; Bernhard, J. (Mainz U., Inst. Kernphys. ; CERN) ; Bicker, K. (Munich, Tech. U. ; CERN) ; Bielert, E.R. (CERN) ; Birsa, R. (INFN, Trieste) ; Bodlak, M. (Charles U., Prague (main)) ; Bordalo, P. (LIP, Lisbon ; Lisbon, CFTP) ; Bradamante, F. (Trieste U. ; INFN, Trieste) ; Bressan, A. (Trieste U. ; INFN, Trieste) ; Büchele, M. (Freiburg U.) ; Burtsev, V.E. (Tomsk Polytechnic U.) ; Capozza, L. (IRFU, Saclay) ; Chang, W.-C. (Taiwan, Inst. Phys.) ; Chatterjee, C. (Matrivani Inst., Calcutta) ; Chiosso, M. (Turin U. ; INFN, Turin) ; Chumakov, A.G. (Tomsk Polytechnic U.) ; Chung, S.-U. (Munich, Tech. U. ; Brookhaven ; Pusan Natl. U.) ; Cicuttin, A. (INFN, Trieste ; ICTP, Trieste) ; Crespo, M.L. (INFN, Trieste ; ICTP, Trieste) ; Curiel, Q. (IRFU, Saclay) ; Dalla Torre, S. (INFN, Trieste) ; Dasgupta, S.S. (Matrivani Inst., Calcutta) ; Dasgupta, S. (Trieste U. ; INFN, Trieste) ; Denisov, O.Yu. (INFN, Turin) ; Dhara, L. (Matrivani Inst., Calcutta) ; Donskov, S.V. (Serpukhov, IHEP) ; Doshita, N. (Yamagata U.) ; Dreisbach, Ch. (Munich, Tech. U.) ; Dünnweber, W. (Heidelberg U.) ; Dusaev, R.R. (Tomsk Polytechnic U.) ; Dziewiecki, M. (Warsaw U. of Tech.) ; Efremov, A. (Dubna, JINR ; Unlisted) ; Eversheim, P.D. (Bonn U., HISKP) ; Faessler, M. (Heidelberg U.) ; Ferrero, A. (IRFU, Saclay) ; Finger, M. (Charles U., Prague (main)) ; Finger, Michael, Jr. (Charles U., Prague (main)) ; Fischer, H. (Freiburg U.) ; Franco, C. (LIP, Lisbon) ; du Fresne von Hohenesche, N. (Mainz U., Inst. Kernphys. ; CERN) ; Friedrich, J.M. (Munich, Tech. U.) ; Frolov, V. (Dubna, JINR ; CERN) ; Gautheron, F. (Ruhr U., Bochum) ; 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. ; Heidelberg 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) ; Hahne, D. (Bonn U.) ; Hamar, G. (INFN, Trieste) ; von Harrach, D. (Mainz U., Inst. Kernphys.) ; Heitz, R. (Illinois U., Urbana) ; Herrmann, F. (Freiburg U.) ; Horikawa, N. (Nagoya U. ; Chubu U.) ; d'Hose, N. (IRFU, Saclay) ; Hsieh, C.-Y. (Taiwan, Inst. Phys. ; Taiwan, Natl. Central U.) ; Huber, S. (Munich, Tech. U.) ; Ishimoto, S. (Yamagata U. ; KEK, Tsukuba) ; Ivanov, A. (Turin U. ; INFN, Turin) ; Ivanshin, Yu. (Dubna, JINR) ; Iwata, T. (Yamagata U.) ; Jary, V. (CTU, Prague) ; Joosten, R. (Bonn U., HISKP) ; Jörg, P. (Freiburg U.) ; Kabuß, E. (Mainz U., Inst. Kernphys.) ; Kerbizi, A. (Trieste U. ; INFN, Trieste) ; Ketzer, B. (Bonn U., HISKP) ; Khaustov, G.V. (Serpukhov, IHEP) ; Khokhlov, Yu.A. (Serpukhov, IHEP ; Moscow, MIPT) ; Kisselev, Yu. (Dubna, JINR) ; Klein, F. (Bonn U.) ; Koivuniemi, J.H. (Ruhr U., Bochum ; Illinois U., Urbana) ; Kolosov, V.N. (Serpukhov, IHEP) ; Kondo, K. (Yamagata U.) ; Konorov, I. (Lebedev Inst. ; Munich, Tech. U.) ; Konstantinov, V.F. (Serpukhov, IHEP) ; Kotzinian, A.M. (INFN, Turin ; Yerevan Phys. Inst.) ; Kouznetsov, O.M. (Dubna, JINR) ; Kral, Z. (CTU, Prague) ; Krämer, M. (Munich, Tech. U.) ; Krinner, F. (Munich, Tech. U.) ; Kroumchtein, Z.V. (Dubna, JINR) ; Kulinich, Y. (Illinois U., Urbana) ; Kunne, F. (IRFU, Saclay) ; Kurek, K. (NCBJ, Swierk) ; Kurjata, R.P. (Warsaw U. of Tech.) ; Kuznetsov, I.I. (Tomsk Polytechnic U.) ; Kveton, A. (CTU, Prague) ; Lednev, A.A. (Serpukhov, IHEP) ; Levchenko, E.A. (Tomsk Polytechnic U.) ; Levorato, S. (INFN, Trieste) ; Lian, Y.-S. (Taiwan, Inst. Phys. ; Taiwan, Natl. Kaohsiung Normal U.) ; Lichtenstadt, J. (Tel Aviv U.) ; Longo, R. (Turin U. ; INFN, Turin) ; Lyubovitskij, V.E. (Tomsk Polytechnic U.) ; Maggiora, A. (INFN, Turin) ; Magnon, A. (Illinois U., Urbana) ; Makins, N. (Illinois U., Urbana) ; Makke, N. (INFN, Trieste ; ICTP, Trieste) ; Mallot, G.K. (CERN) ; Mamon, S.A. (Tomsk Polytechnic U.) ; Marchand, C. (IRFU, Saclay) ; Marianski, B. (NCBJ, Swierk) ; Martin, A. (Trieste U. ; INFN, Trieste) ; Marzec, J. (Warsaw U. of Tech.) ; Matoušek, J. (Trieste U.) ; Matsuda, H. (Yamagata U.) ; Matsuda, T. (Miyazaki U.) ; Meshcheryakov, G.V. (Dubna, JINR) ; Meyer, M. (Illinois U., Urbana ; IRFU, Saclay) ; Meyer, W. (Ruhr U., Bochum) ; Mikhailov, Yu.V. (Serpukhov, IHEP) ; Mikhasenko, M. (Bonn U., HISKP) ; Mitrofanov, E. (Dubna, JINR) ; Mitrofanov, N. (Dubna, JINR) ; Miyachi, Y. (Yamagata U.) ; Moretti, A. (Trieste U.) ; Nagaytsev, A. (Dubna, JINR) ; Nerling, F. (Mainz U., Inst. Kernphys.) ; Neyret, D. (IRFU, Saclay) ; Nový, J. (CTU, Prague ; CERN) ; Nowak, W.-D. (Mainz U., Inst. Kernphys.) ; Nukazuka, G. (Yamagata U.) ; Nunes, A.S. (LIP, Lisbon) ; Olshevsky, A.G. (Dubna, JINR) ; Orlov, I. (Dubna, JINR) ; Ostrick, M. (Mainz U., Inst. Kernphys.) ; Panzieri, D. (INFN, Turin ; Turin U.) ; Parsamyan, B. (Turin U. ; INFN, Turin) ; Paul, S. (Munich, Tech. U.) ; Peng, J.-C. (Illinois U., Urbana) ; Pereira, F. (Aveiro U.) ; Pesaro, G. (Trieste U. ; INFN, Trieste) ; Pešek, M. (Charles U., Prague (main)) ; Pešková, M. (Charles U., Prague (main)) ; Peshekhonov, D.V. (Dubna, JINR) ; Pierre, N. (Mainz U., Inst. Kernphys. ; IRFU, Saclay) ; Platchkov, S. (IRFU, Saclay) ; Pochodzalla, J. (Mainz U., Inst. Kernphys.) ; Polyakov, V.A. (Serpukhov, IHEP) ; Pretz, J. (Bonn U. ; Aachen, Tech. Hochsch.) ; Quaresma, M. (LIP, Lisbon) ; Quintans, C. (LIP, Lisbon) ; Ramos, S. (LIP, Lisbon ; Lisbon, CFTP) ; Regali, C. (Freiburg U.) ; Reicherz, G. (Ruhr U., Bochum) ; Riedl, C. (Illinois U., Urbana) ; Ryabchikov, D.I. (Serpukhov, IHEP ; Munich, Tech. U.) ; Rybnikov, A. (Dubna, JINR) ; Rychter, A. (Warsaw U. of Tech.) ; Salac, R. (CTU, Prague) ; Samoylenko, V.D. (Serpukhov, IHEP) ; Sandacz, A. (NCBJ, Swierk) ; Sarkar, S. (Matrivani Inst., Calcutta) ; Savin, I.A. (Dubna, JINR ; Unlisted) ; Sawada, T. (Taiwan, Inst. Phys.) ; Sbrizzai, G. (Trieste U. ; INFN, Trieste) ; Schiavon, P. (Trieste U. ; INFN, Trieste) ; Schmieden, H. (Bonn U.) ; Seder, E. (IRFU, Saclay) ; Selyunin, A. (Dubna, JINR) ; Silva, L. (LIP, Lisbon) ; Sinha, L. (Matrivani Inst., Calcutta) ; Sirtl, S. (Freiburg U.) ; Slunecka, M. (Dubna, JINR) ; Sozzi, F. (INFN, Trieste) ; Smolik, J. (Dubna, JINR) ; Srnka, A. (Inst. Sci. Instruments, Brno) ; Steffen, D. (CERN ; Munich, Tech. U.) ; Stolarski, M. (LIP, Lisbon) ; Subrt, O. (CERN ; CTU, Prague) ; Sulc, M. (Liberec Tech. U.) ; Suzuki, H. (Yamagata U. ; Chubu U.) ; Szabelski, A. (Trieste U.) ; Szameitat, T. (Freiburg U. ; Heidelberg U.) ; Sznajder, P. (NCBJ, Swierk) ; Tasevsky, M. (Dubna, JINR) ; Tessaro, S. (INFN, Trieste) ; Tessarotto, F. (INFN, Trieste) ; Thiel, A. (Bonn U., HISKP) ; Tomsa, J. (Charles U., Prague (main)) ; Tosello, F. (INFN, Turin) ; Tskhay, V. (Lebedev Inst.) ; Uhl, S. (Munich, Tech. U.) ; Vasilishin, B.I. (Tomsk Polytechnic U.) ; Vauth, A. (CERN) ; Veit, B.M. (Mainz U., Inst. Kernphys.) ; Veloso, J. (Aveiro U.) ; Vidon, A. (IRFU, Saclay) ; Virius, M. (CTU, Prague) ; Wallner, S. (Munich, Tech. U.) ; Wilfert, M. (Mainz U., Inst. Kernphys.) ; Windmolders, R. (Bonn U.) ; Zaremba, K. (Warsaw U. of Tech.) ; Zavada, P. (Dubna, JINR) ; Zavertyaev, M. (Lebedev Inst.) ; Zemlyanichkina, E. (Dubna, JINR ; Unlisted) ; Zhuravlev, N. (Dubna, JINR) ; Ziembicki, M. (Warsaw U. of Tech.)

Publication 2018-11-10
Imprint 06 Oct 2018
Number of pages 9
Note 16 pages, 7 figures
Published in: Phys. Lett. B 786 (2018) 390-398
DOI 10.1016/j.physletb.2018.09.052
Subject category Particle Physics - Experiment ; hep-ph ; Particle Physics - Phenomenology ; hep-ex
Accelerator/Facility, Experiment CERN SPS ; NA58
Keywords QCD ; hard scattering ; experimental results ; Multiplicities ; Kaons ; SIDIS ; Large z
Abstract The K$^{-}$ over K$^{+}$ multiplicity ratio is measured in deep-inelastic scattering, for the first time for kaons carrying a large fraction $z$ of the virtual-photon energy. The data were obtained by the COMPASS collaboration using a 160 GeV muon beam and 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. Kaons are identified in the momentum range from 12 GeV/$c$ to 40 GeV/$c$, thereby restricting the range in Bjorken-$x$ to $0.010.75$. For very large values of $z$, $i.e.$ $z>0.8$, the results contradict expectations obtained using the formalism of (next-to-)leading order perturbative quantum chromodynamics. This may imply that cross-section factorisation or/and universality of (kaon) fragmentation functions do not hold. Our studies suggest that within this formalism an additional correction may be required, which takes into account the phase space available for hadronisation.
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Copyright/License Preprint: © 2018-2025 CERN (License: arXiv nonexclusive-distrib. 1.0)
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