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Nearly ten years ago, Kang, Ma, Qiu, and Sterman derived an evolution equation for a QQ¯ pair fragmenting into a quarkonium. In this study we explore the consequence of this evolution for the color-evaporation model, focusing on J/ψ transverse-momentum (pt) distributions in proton-proton collisions. We show that, as expected, it softens the spectrum obtained by fixed-order calculations.
Ambio, Mar 2023 This is a preview of a remote PDF: https://link.springer.com/content/pdf/10.1007/s13280-023-01835-2.pdf Waloven, Sydney, Kapsar, Kelly, Schwoerer, Tobias, Berman, Matthew, I. Schmidt, Jennifer, Viña, Andrés, Liu, Jianguo. , Ambio, 2023, pp. 1-16, DOI: 10.1007/s13280-023-01835-2
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