Entanglement entropy, Monte Carlo event generators, and soft gluons DIScovery Article Swipe

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Martin Hentschinski , H. Jung , Krzysztof Kutak ·

YOU? · · 2025 · Open Access · · DOI: https://doi.org/10.48550/arxiv.2509.03400

We study entropy production in Deep Inelastic Scattering using Monte Carlo simulations. We show that the dominant contribution to entropy is due to soft gluons. This contribution is usually neglected in standard Monte Carlo approaches, since it does not affect hadronic spectra. However, it is relevant for entropy and multiplicity distributions, as we demonstrate with explicit calculations. We further show that, as one lowers the cutoff - i.e. includes soft gluons - thereby making the Monte Carlo parton distributions closer to inclusive PDFs, the resulting entropy is very close to that measured by the H1 collaboration, without the need to account for hadronization effects. This provides further evidence that the bulk of the measured entropy originates from initial-state effects.

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Type: preprint
Language: en
Landing Page: http://arxiv.org/abs/2509.03400
PDF: https://arxiv.org/pdf/2509.03400
OA Status: green
OpenAlex ID: https://openalex.org/W4414837745

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OpenAlex ID: https://openalex.org/W4414837745

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DOI: https://doi.org/10.48550/arxiv.2509.03400

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Title: Entanglement entropy, Monte Carlo event generators, and soft gluons DIScovery

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Type: preprint

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Language: en

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Publication year: 2025

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Publication date: 2025-09-03

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Authors: Martin Hentschinski, H. Jung, Krzysztof Kutak

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Landing page: https://arxiv.org/abs/2509.03400

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PDF URL: https://arxiv.org/pdf/2509.03400

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OA status: green

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Cited by: 0

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