Abstract
We present a brief review of results of chiral quark models for soft matrix elements in the pion state, appearing in high-energy processes as well as accessible in present and future lattice studies. A particular attention is paid to the recently explored double parton distribution functions of the pion.
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Dedicated to David Blaschke on the occasion of his 60th birthday. Presented by WB at The 40th Max Born Symposium Three Days on Strong Correlations in Dense Matter, 9-12 October 2019, Wrocław, Poland.
Supported by the Polish National Science Centre (NCN) Grant 2018/31/B/ST2/01022, the Spanish Ministerio de Economia y Competitividad and European FEDER funds Grant FIS2017-85053-C2-1-P, and Junta de Andaluca Grant FQM-225.
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Broniowski, W., Arriola, E.R. Applications of the Nambu–Jona-Lasinio model to the partonic structure of the pion. Eur. Phys. J. Spec. Top. 229, 3341–3349 (2020). https://doi.org/10.1140/epjst/e2020-000046-8
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DOI: https://doi.org/10.1140/epjst/e2020-000046-8