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Unveiling the Collins-Soper kernel in inclusive DIS at threshold

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arxiv 2502.15033 v1 pith:U2YNM52W submitted 2025-02-20 hep-ph hep-exhep-lathep-th

Andrea Simonelli , Alberto Accardi , Matteo Cerutti , Caroline S. R. Costa , Andrea Signori This is my paper · ORCID
classification hep-phhep-exhep-lathep-th
keywords collins-soperkernelinclusiverapiditythresholdaroundcalculateclarify
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We revisit the factorization of inclusive deep inelastic scattering near the kinematic threshold to explicitly track off-lightcone effects. Particle production develops around two opposite near-lightcone directions like in transverse-momentum-dependent processes, and the Collins-Soper kernel emerges as a universal function in the rapidity evolution of the relevant parton correlators. We clarify outstanding issues regarding soft radiation and rapidity divergences, and uncover a new way to calculate the Collins-Soper kernel on the lattice with collinear operators.

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  1. Systematic uncertainties from higher-twist corrections in DIS at large x

    hep-ph 2025-01 conditional novelty 6.0 of 10

    Isospin-dependent higher-twist corrections remove a systematic bias in large-x DIS global fits that otherwise distorts the n/p ratio and the deuteron off-shell function.

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