H1 Collaboration2021-06-102021-06-102021H1 Collaboration. "Measurement of charged particle multiplicity distributions in DIS at HERA and its implication to entanglement entropy of partons." <i>The European Physical Journal C,</i> 81, (2021) Springer Nature: https://doi.org/10.1140/epjc/s10052-021-08896-1.https://hdl.handle.net/1911/110711Charged particle multiplicity distributions in positron-proton deep inelastic scattering at a centre-of-mass energy s√=319 GeV are measured. The data are collected with the H1 detector at HERA corresponding to an integrated luminosity of 136 pb−1. Charged particle multiplicities are measured as a function of photon virtuality Q2, inelasticity y and pseudorapidity η 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 Q2 and the Bjorken variable xbj are converted to the hadron entropy Shadron, and predictions from a quantum entanglement model are tested.engThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder.Journal articleMeasurementOfChargedParticleMuhttps://doi.org/10.1140/epjc/s10052-021-08896-1