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Shu, Hai-Tao ; Schlemmer, Maximilian ; Sizmann, Tobias ; Vladimirov, Alexey ; Walter, Lisa ; Engelhardt, Michael ; Schäfer, Andreas ; Yang, Yi-Bo

Universality of the Collins-Soper kernel in lattice calculations

Shu, Hai-Tao , Schlemmer, Maximilian, Sizmann, Tobias, Vladimirov, Alexey , Walter, Lisa, Engelhardt, Michael, Schäfer, Andreas and Yang, Yi-Bo (2023) Universality of the Collins-Soper kernel in lattice calculations. Physical Review D 108 (7), 074519.

Date of publication of this fulltext: 08 Feb 2024 13:31
Article
DOI to cite this document: 10.5283/epub.55437


Abstract

The Collins-Soper (CS) kernel is a nonperturbative function that characterizes the rapidity evolution of transverse-momentum-dependent parton distribution functions (TMDPDFs) and wave functions. In this paper, we calculate the CS kernel for pion and proton targets and for quasi-TMDPDFs of leading and next-to-leading power. The calculations are carried out on the CLS ensemble H101 with dynamical ...

The Collins-Soper (CS) kernel is a nonperturbative function that characterizes the rapidity evolution of transverse-momentum-dependent parton distribution functions (TMDPDFs) and wave functions. In this paper, we calculate the CS kernel for pion and proton targets and for quasi-TMDPDFs of leading and next-to-leading power. The calculations are carried out on the CLS ensemble H101 with dynamical Nf=2+1 clover-improved Wilson fermions. Our analyses demonstrate the consistency of different lattice extractions of the CS kernel for mesons and baryons, as well as for twist-two and twist-three operators, even though lattice artifacts could be significant. This consistency corroborates the universality of the lattice-determined CS kernel and suggests that a high-precision determination of it is in reach.



Involved Institutions


Details

Item typeArticle
Journal or Publication TitlePhysical Review D
Publisher:American Physical Society
Open Access Type:SCOAP3
Volume:108
Number of Issue or Book Chapter:7
Page Range:074519
Date31 October 2023
InstitutionsPhysics > Institute of Theroretical Physics > Chair Professor Schäfer > Group Andreas Schäfer
Identification Number
ValueType
10.1103/PhysRevD.108.074519DOI
Dewey Decimal Classification500 Science > 530 Physics
StatusPublished
RefereedYes, this version has been refereed
Created at the University of RegensburgPartially
URN of the UB Regensburgurn:nbn:de:bvb:355-epub-554374
Item ID55437

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