Transverse momentum dependence of the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>T</mml:mi></mml:math>-even hadronic structure functions in the Drell-Yan process

We present detailed analysis of the <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mi>T</a:mi></a:math>-even lepton angular distribution in the Drell-Yan process including <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:mi>γ</c:mi><c:mo>/</c:mo><c:msup><c:mi>Z</c:mi><c:mn>0</c:mn></c:msup></c:math> gauge boson exchange and using perturbative QCD based on the collinear factorization scheme at leading order in the <e:math xmlns:e="http://www.w3.org/1998/Math/MathML" display="inline"><e:msub><e:mi>α</e:mi><e:mi>s</e:mi></e:msub></e:math> expansion. We focus on the study of the transverse momentum <g:math xmlns:g="http://www.w3.org/1998/Math/MathML" display="inline"><g:msub><g:mi>Q</g:mi><g:mi>T</g:mi></g:msub></g:math> dependence of the corresponding hadronic structure functions and angular coefficients up to next-to-next-to-leading order in the <i:math xmlns:i="http://www.w3.org/1998/Math/MathML" display="inline"><i:msubsup><i:mi>Q</i:mi><i:mi>T</i:mi><i:mn>2</i:mn></i:msubsup><i:mo>/</i:mo><i:msup><i:mi>Q</i:mi><i:mn>2</i:mn></i:msup></i:math> expansion. We analyze <k:math xmlns:k="http://www.w3.org/1998/Math/MathML" display="inline"><k:msub><k:mi>Q</k:mi><k:mi>T</k:mi></k:msub></k:math> dependence numerically and compare <m:math xmlns:m="http://www.w3.org/1998/Math/MathML" display="inline"><m:mi>T</m:mi></m:math>-even angular coefficients integrated over rapidity with available data of the ATLAS Collaboration at LHC. Additionally, we present our results for the forward-backward asymmetry and compare it with data. Published by the American Physical Society 2024