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Measurement of charged particle multiplicity distributions in DIS at HERA and its implication to entanglement entropy of partons

Vladimir AndreevLebedev Physical Institute, Moscow, RussiaA. BaghdasaryanYerevan Physics Institute, Yerevan, ArmeniaA. BatyRice University, Houston, USAK. BegzsurenInstitute of Physics and Technology of the Mongolian Academy of Sciences, Ulaanbaatar, MongoliaA. BelousovLebedev Physical Institute, Moscow, RussiaA. E. BolzPhysikalisches Institut, Universität Heidelberg, Heidelberg, GermanyV. BoudryLLR, Ecole Polytechnique, CNRS/IN2P3, Palaiseau, FranceO. BrandtII. Physikalisches Institut, Universität Göttingen, Göttingen, GermanyD. BritzgerMax-Planck-Institut für Physik, Munich, GermanyA. BuniatyanSchool of Physics and Astronomy, University of Birmingham, Birmingham, UKL. BystritskayaInstitute for Theoretical and Experimental Physics, Moscow, RussiaAlan CampbellK. B. Cantun AvilaDepartamento de Fisica Aplicada, CINVESTAV, Mérida, Yucatán, MexicoK. ČernýPalackỳ University Olomouc, Olomouc, Czech RepublicV. ChekelianMax-Planck-Institut für Physik, Munich, GermanyZ. ChenShandong University, Shandong, People’s Republic of ChinaJ. G. ContrerasDepartamento de Fisica Aplicada, CINVESTAV, Mérida, Yucatán, MexicoJ. CvachInstitute of Physics, Academy of Sciences of the Czech Republic, Praha, Czech RepublicJ.B. DaintonDepartment of Physics, University of Liverpool, Liverpool, UKK. DaumFachbereich C, Universität Wuppertal, Wuppertal, GermanyA. DeshpandeStony Brook University, Stony Brook, NY, 11794, USAC. DiaconuAix Marseille Université, CNRS/IN2P3, CPPM UMR 7346, 13288, Marseille, FranceG. EckerlinS. EgliPaul Scherrer Institut, Villigen, SwitzerlandE. ElsenNow at CERN, Geneva, SwitzerlandL. FavartInter-University Institute for High Energies ULB-VUB, Brussels and Universiteit Antwerpen, Antwerp, BelgiumA. FedotovInstitute for Theoretical and Experimental Physics, Moscow, RussiaJ. FeltesseIrfu/SPP, CE Saclay, Gif-sur-Yvette, FranceM. FleischerA. FomenkoLebedev Physical Institute, Moscow, RussiaC. GalStony Brook University, Stony Brook, NY, 11794, USAJ. GaylerL. GoerlichInstitute of Nuclear Physics Polish Academy of Sciences, 31342, Kraków, PolandN. GogitidzeLebedev Physical Institute, Moscow, RussiaM. GouzevitchUniversité Claude Bernard Lyon 1, CNRS/IN2P3, Villeurbanne, FranceC. GrabInstitut für Teilchenphysik, ETH, Zurich, SwitzerlandA. GrebenyukInter-University Institute for High Energies ULB-VUB, Brussels and Universiteit Antwerpen, Antwerp, BelgiumT. GreenshawDepartment of Physics, University of Liverpool, Liverpool, UKG. GrindhammerMax-Planck-Institut für Physik, Munich, GermanyD. HaidtR. C. W. HendersonDepartment of Physics, University of Lancaster, Lancaster, UKJ. HladkýInstitute of Physics, Academy of Sciences of the Czech Republic, Praha, Czech RepublicD. HoffmannAix Marseille Université, CNRS/IN2P3, CPPM UMR 7346, 13288, Marseille, FranceR. HorisbergerPaul Scherrer Institut, Villigen, SwitzerlandT. HreusInter-University Institute for High Energies ULB-VUB, Brussels and Universiteit Antwerpen, Antwerp, BelgiumF. HuberPhysikalisches Institut, Universität Heidelberg, Heidelberg, GermanyM. JacquetLAL, Université Paris-Sud, CNRS/IN2P3, Orsay, FranceX. JanssenInter-University Institute for High Energies ULB-VUB, Brussels and Universiteit Antwerpen, Antwerp, BelgiumA. W. JungDepartment of Physics and Astronomy, Purdue University, 525 Northwestern Ave, West Lafayette, IN, 47907, USAH. JungM. KapichineJoint Institute for Nuclear Research, Dubna, RussiaJ. KatzyC. KieslingMax-Planck-Institut für Physik, Munich, GermanyM. KleinDepartment of Physics, University of Liverpool, Liverpool, UKC. KleinwortR. KoglerInstitut für Experimentalphysik, Universität Hamburg, Hamburg, GermanyP. KostkaDepartment of Physics, University of Liverpool, Liverpool, UKJ. KretzschmarDepartment of Physics, University of Liverpool, Liverpool, UKD. KrückerK. KrügerM. P. J. LandonSchool of Physics and Astronomy, Queen Mary, University of London, London, UKW. LangeDESY, Zeuthen, GermanyP. LaycockDepartment of Physics, University of Liverpool, Liverpool, UKA. LebedevLebedev Physical Institute, Moscow, RussiaS. LevonianK. LipkaB. ListJ. ListW. LiRice University, Houston, USAB. ŁobodzińskiMax-Planck-Institut für Physik, Munich, GermanyE. MalinovskiLebedev Physical Institute, Moscow, RussiaH.-U. MartynI. Physikalisches Institut der RWTH, Aachen, GermanyS. J. MaxfieldDepartment of Physics, University of Liverpool, Liverpool, UKA. MehtaDepartment of Physics, University of Liverpool, Liverpool, UKA. MeyerH. MeyerFachbereich C, Universität Wuppertal, Wuppertal, GermanyJ. MeyerS. MikockiInstitute of Nuclear Physics Polish Academy of Sciences, 31342, Kraków, PolandM. M. MondalStony Brook University, Stony Brook, NY, 11794, USAA. MorozovJoint Institute for Nuclear Research, Dubna, RussiaK. MüllerPhysik-Institut der Universität Zürich, Zurich, SwitzerlandT. NaumannDESY, Zeuthen, GermanyP. R. NewmanSchool of Physics and Astronomy, University of Birmingham, Birmingham, UKC. NiebuhrG. NowakInstitute of Nuclear Physics Polish Academy of Sciences, 31342, Kraków, PolandJ. E. OlssonD. OzerovPaul Scherrer Institut, Villigen, SwitzerlandS. ParkStony Brook University, Stony Brook, NY, 11794, USAC. PascaudLAL, Université Paris-Sud, CNRS/IN2P3, Orsay, FranceG. D. PatelDepartment of Physics, University of Liverpool, Liverpool, UKE. PerezNow at CERN, Geneva, SwitzerlandA. PetrukhinUniversité Claude Bernard Lyon 1, CNRS/IN2P3, Villeurbanne, FranceI. PićurićFaculty of Science, University of Montenegro, Podgorica, MontenegroD. PitzlR. PolifkaFaculty of Mathematics and Physics, Charles University, Praha, Czech RepublicV. RadescuDepartment of Physics, Oxford University, Oxford, UKN. RaičevićFaculty of Science, University of Montenegro, Podgorica, MontenegroT. RavdandorjInstitute of Physics and Technology of the Mongolian Academy of Sciences, Ulaanbaatar, MongoliaP. ReimerInstitute of Physics, Academy of Sciences of the Czech Republic, Praha, Czech RepublicE. RizviSchool of Physics and Astronomy, Queen Mary, University of London, London, UK

2021en

ABI

Annotatsiya

Abstract Charged particle multiplicity distributions in positron-proton deep inelastic scattering at a centre-of-mass energy $$\sqrt{s}=319$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:msqrt> <mml:mi>s</mml:mi> </mml:msqrt> <mml:mo>=</mml:mo> <mml:mn>319</mml:mn> </mml:mrow> </mml:math> GeV are measured. The data are collected with the H1 detector at HERA corresponding to an integrated luminosity of 136 pb $$^{-1}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msup> <mml:mrow/> <mml:mrow> <mml:mo>-</mml:mo> <mml:mn>1</mml:mn> </mml:mrow> </mml:msup> </mml:math> . Charged particle multiplicities are measured as a function of photon virtuality $$Q^2$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msup> <mml:mi>Q</mml:mi> <mml:mn>2</mml:mn> </mml:msup> </mml:math> , inelasticity y and pseudorapidity $$\eta $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>η</mml:mi> </mml:math> in the laboratory and the hadronic centre-of-mass frames. Predictions from different Monte Carlo models are compared to the data. The first and second moments of the multiplicity distributions are determined and the KNO scaling behaviour is investigated. The multiplicity distributions as a function of $$Q^2$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msup> <mml:mi>Q</mml:mi> <mml:mn>2</mml:mn> </mml:msup> </mml:math> and the Bjorken variable $$x_{\mathrm{bj}}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub> <mml:mi>x</mml:mi> <mml:mi>bj</mml:mi> </mml:msub> </mml:math> are converted to the hadron entropy $$S_{\mathrm{hadron}}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub> <mml:mi>S</mml:mi> <mml:mi>hadron</mml:mi> </mml:msub> </mml:math> , and predictions from a quantum entanglement model are tested.

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DOI: 10.1140/epjc/s10052-021-08896-1

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