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Modification of Quark-Gluon Distributions in Nuclei by Correlated Nucleon Pairs.
Phys Rev Lett
October 2024
Laboratoire de Physique Subatomique et de Cosmologie, Université Grenoble-Alpes, CNRS/IN2P3, 53 avenue des Martyrs, 38026 Grenoble, France.
We extend the QCD Parton Model analysis using a factorized nuclear structure model incorporating individual nucleons and pairs of correlated nucleons. Our analysis of high-energy data from lepton deep-inelastic scattering, Drell-Yan, and W and Z boson production simultaneously extracts the universal effective distribution of quarks and gluons inside correlated nucleon pairs, and their nucleus-specific fractions. Such successful extraction of these universal distributions marks a significant advance in our understanding of nuclear structure properties connecting nucleon- and parton-level quantities.
View Article and Find Full Text PDFW-boson production in TMD factorization.
Eur Phys J C Part Fields
May 2021
Departamento de Física Teórica and IPARCOS, Universidad Complutense de Madrid (UCM), Plaza Ciencias 1, 28040 Madrid, Spain.
At hadron colliders, the differential cross section for production can be factorized and it is sensitive transverse momentum dependent distributions (TMD) for low boson transverse momentum. While, often, the corresponding non-perturbative QCD contributions are extrapolated from boson production, here we use an existing extraction (based on the code Artemide) of TMD which includes data coming from Drell-Yan and semi-inclusive deep inelastic scattering, to provide checks and predictions for the case. Including fiducial cuts with different configurations and kinematical power corrections, we consider transverse momentum dependent cross sections within several intervals of the vector boson transverse mass.
View Article and Find Full Text PDFRapidity distribution at soft-virtual and beyond for -colorless particles to LO in QCD.
Eur Phys J C Part Fields
October 2021
The Institute of Mathematical Sciences, HBNI, IV Cross Road, Taramani, Chennai, 600113 India.
We present a systematic framework to study the threshold contributions of the differential rapidity distribution for the production of any number of colorless particles in the hadronic colliders. This has been achieved based on the universality structure of the soft enhancements associated with the real emissions, along with the factorization property of the differential cross section and the renormalization group invariance. In this formalism, we present a universal soft-collinear operator to compute the soft virtual differential cross section for a generic scattering process up to next-to-next-to-next-to-next-to-leading order ( LO) in perturbative QCD.
View Article and Find Full Text PDFExtraction of the Sivers Function from SIDIS, Drell-Yan, and W^{±}/Z Data at Next-to-Next-to-Next-to Leading Order.
Phys Rev Lett
March 2021
Institut für Theoretische Physik, Universität Regensburg, D-93040 Regensburg, Germany.
We perform the global analysis of polarized semi-inclusive deep inelastic scattering (SIDIS), pion-induced polarized Drell-Yan (DY) process, and W^{±}/Z boson production data and extract the Sivers function for u, d, s and for sea quarks. We use the framework of transverse momentum dependent factorization at next-to-next-to-next-to leading order (N^{3}LO) accuracy. The Qiu-Sterman function is determined in a model independent way from the extracted Sivers function.
View Article and Find Full Text PDFLattice QCD Calculations of Transverse-Momentum-Dependent Soft Function through Large-Momentum Effective Theory.
Phys Rev Lett
November 2020
CAS Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190, China.
The transverse-momentum-dependent (TMD) soft function is a key ingredient in QCD factorization of Drell-Yan and other processes with relatively small transverse momentum. We present a lattice QCD study of this function at moderately large rapidity on a 2+1 flavor CLS dynamic ensemble with a=0.098 fm.
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