Charged Particle Multiplicities and Quantum Entanglement in DIS

Reference July 2020
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Contact Zhoudunming Tu
Abstract New experimental data on charged particle multiplicity distributions are presented, covering the kinematic ranges in momentum transfer 5< Q^2< 100 GeV^2 and inelasticity 0.0375< y< 0.6. The data were recorded with the H1 experiment at the HERA collider in positron-proton collisions at a centre-of-mass energy of 320 GeV. Charged particles are counted with transverse momenta P_T>150 MeV and pseudorapidity -1.6< eta_lab<1.6 in the laboratory frame, corresponding to high acceptance in the current hemisphere of the hadronic centre-of-mass frame. Charged particle multiplicities are reported on a two-dimensional grid of Q^2, $y$ and on a three-dimensional grid of Q^2, y, eta. The observable is the probability P(N) to observe N particles in the given eta region. The data are confronted with predictions from Monte Carlo generators, and with a simplistic model based on quantum entanglement and strict parton-hadron duality.
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