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Determination of the Collins-Soper kernel from cross-sections ratios



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Bermúdez Martínez, Armando and Vladimirov, Alexey (2022) Determination of the Collins-Soper kernel from cross-sections ratios. Physical review D, 106 (9). ISSN 2470-0010

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Official URL: http://dx.doi.org/10.1103/PhysRevD.106.L091501


The Collins-Soper kernel is a powerful tool for studying the properties of the QCD vacuum and an essential component of the transverse momentum dependent (TMD) factorization theorem. In this paper, we present a novel method for determining the Collins-Soper kernel directly from the comparison of differential cross sections measured at different energies. The method relies solely on the structure of the TMD factorization theorem and thus also provides a direct test of the theorem validity. With minor modifications, the procedure can be applied to the real measured data for Drell-Yan and SIDIS processes. As a demonstration, we analyze the pseudodata generated by the CASCADE event generator and determine the Collins-Soper kernel suggested by the parton branching model.

Item Type:Article
Additional Information:

© 2002 Amer Physical Soc
We thank Hannes Jung and Francesco Hautmann for discussions, and also Qi-An Zhang and Alessandro Bacchetta for providing us with their extractions. A. V. is funded by the Atraccion de Talento Investigador program of the Comunidad de Madrid (Spain) No. 2020-T1/TIC -20204. This work was partially supported by DFG FOR 2926 Next Generation pQCD for Hadron Structure: Preparing for the EIC , Project No. 430824754

Uncontrolled Keywords:Astronomy & astrophysics; Physics, particles & fields
Subjects:Sciences > Physics
ID Code:76854
Deposited On:03 Mar 2023 18:26
Last Modified:03 Mar 2023 18:26

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