Article
Physics, Particles & Fields
Marcin Bury, Alexei Prokudin, Alexey Vladimirov
Summary: A global fit was performed to extract the Sivers function for u, d, s, and sea quarks, as well as determine the Qiu-Sterman function in a model-independent way. The study also included additional aspects such as estimating applicability region, impact of unpolarized distributions' uncertainties, universality of Sivers functions, and comparing with existing extractions.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Paul Caucal, Farid Salazar, Raju Venugopalan
Summary: In this study, the next-to-leading order impact factor for inclusive dijet production in deeply inelastic electron-nucleus scattering at small x(Bj) is computed within the framework of the Color Glass Condensate effective field theory, improving the accuracy of the cross-section. These results are crucial for evaluating the discovery potential of inclusive dijets to reveal the physics of gluon saturation at the Electron-Ion Collider.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
V. M. Braun, K. G. Chetyrkin, B. A. Kniehl
Summary: In this study, the short-distance expansion of the product of two gluon field strength tensors connected by a straight-line-ordered Wilson line is considered. The three-loop coefficient functions of the scalar operators in the operator product expansion up to dimension four are calculated, and the three-loop anomalous dimension of the nonlocal two-gluon operator is obtained as a by-product.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Renaud Boussarie, Heikki Mantysaari, Farid Salazar, Bjorn Schenke
Summary: This study focuses on computing the differential yield for quark anti-quark dijet production in high-energy electron-proton and electron-nucleus collisions at small x. It compares results between the Color Glass Condensate (CGC) and the improved TMD (ITMD) frameworks, highlighting genuine higher saturation contributions. The study provides numerical estimates for inclusive dijet production at the future Electron-Ion Collider, aiming to allow detailed experimental study of kinematic power corrections and genuine gluon saturation effects.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Zhong-Bo Kang, Jared Reiten, Ding Yu Shao, John Terry
Summary: Using Soft-Collinear Effective Theory, this study develops a transverse-momentum-dependent factorization formalism for heavy flavor dijet production in polarized-proton-electron collisions. By considering heavy flavor mass corrections and comparing theoretical predictions with and without finite quark masses, it is found that heavy flavor mass effects can significantly impact the predicted asymmetry for gluon Sivers asymmetry in charm and bottom dijet production at the future Electron-Ion Collider.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Astronomy & Astrophysics
Miguel Arratia, Zhong-Bo Kang, Sebouh J. Paul, Alexei Prokudin, Felix Ringer, Fanyi Zhao
Summary: We investigate the potential of jet observables in charged-current deep inelastic scattering events at the future Electron-Ion Collider. By tagging jets with a recoiling neutrino and identifying it through the event's missing transverse momentum, we can make flavor-sensitive measurements of transverse momentum dependent parton distribution functions. We present the first predictions for transverse-spin asymmetries in azimuthal neutrino-jet correlations and hadron-in-jet measurements.
Article
Astronomy & Astrophysics
Maral Salajegheh, Hamzeh Khanpour, Ulf-G. Meissner, Hadi Hashamipour, Maryam Soleymaninia
Summary: This study presents an updated set of SKMHS diffractive parton distribution functions (PDFs), including the recent diffractive dijet cross-section measurement. The new sets, SKMHS23 and SKMHS23-dijet, are presented at NLO and NNLO accuracy in perturbative QCD. The effect of diffractive dijet data and higher-order QCD corrections on the extracted PDFs and data/theory agreements are clearly examined and discussed.
Article
Astronomy & Astrophysics
Lei Wang, Zhong-Bo Kang, Hongxi Xing, Ben-Wei Zhang
Summary: This study calculates semi-inclusive jet functions and fragmenting jet functions at next-to-leading order within the framework of soft collinear effective theory. The results are compared for different jet algorithms and new results are obtained for fragmenting jet functions. Renormalization-group equations are derived and shown to follow evolution equations independent of specific jet algorithms, with potential applications for highly collimated jets.
Article
Astronomy & Astrophysics
S. I. Alekhin, S. A. Kulagin, R. Petti
Summary: We present the findings of a global QCD analysis that incorporates deep-inelastic scattering data from 1H, 2H, 3H, and 3He targets. We account for nuclear corrections using a nuclear convolution approach with off-shell bound nucleons, including the off-shell corrections responsible for the modification of the bound nucleons' structure functions (SFs). These corrections are determined in a global fit, along with the proton parton distribution functions (PDFs) and higher-twist terms. We examine the differences between protons and neutrons in terms of the off-shell correction and discuss our predictions for the ratio of the SFs Fn2/Fp2 and the corresponding PDF ratio d/u in the proton, as well as their correlations with the treatment of higher-twist terms and off-shell corrections. Notably, we find that the recent MARATHON data support equal relative off-shell corrections for both protons and neutrons.
Article
Physics, Particles & Fields
Enrico Lunghi, Nathan Sherrill, Adam Szczepaniak, Alexandre Vieira
Summary: The study investigates quark-sector Lorentz violation in Drell-Yan dilepton production with Z-boson exchange, demonstrating how the chiral nature of weak interactions allows for the study of parity-violating and spin-dependent effects using unpolarized initial states. Constraints on Lorentz violation coefficients for the first two generations of quarks are established based on measurements from the Large Hadron Collider.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
S. Kumano, Qin-Tao Song
Summary: This work explores the twist-2 relation and sum rule for tensor-polarized parton distribution functions, providing valuable insights for studying spin-1 hadrons and separating twist-2 components from higher-twist terms. The existence of twist-3 multiparton distribution functions for tensor-polarized spin-1 hadrons is also highlighted, showcasing the potential for probing multiparton correlations in these particles. Furthermore, upcoming experimental projects focusing on spin-1 hadrons' spin structure indicate a growing interest in this area of physics.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Hong-Fei Zhang, Xue-Mei Mo
Summary: The study calculates eta(c) meson leptoproduction for the first time within the nonrelativistic QCD framework and finds that the color-singlet channel contributes significantly to experimental conditions despite being suppressed relative to the color-octet channels. Differential cross section data is provided as a reference for future studies, and the study also investigates scale dependence and long-distance-matrix-element dependence.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Tianbo Liu, W. Melnitchouk, Jian-Wei Qiu, N. Sato
Summary: This paper introduces a new factorized approach to semi-inclusive deep-inelastic scattering, treating QED and QCD radiation equally, and providing a systematically improvable approximation to the extraction of transverse momentum dependent parton distributions. It demonstrates the approximation of QED contributions through collinear factorization, and illustrates its application in inclusive scattering, as well as how radiation effects impact the photon-nucleon frame in semi-inclusive processes. The utility of the new method is illustrated through explicit application to spin-dependent Sivers and Collins asymmetries.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
S. Bastami, L. Gamberg, B. Parsamyan, B. Pasquini, A. Prokudin, P. Schweitzer
Summary: The study calculates structure functions for the pion-induced Drell-Yan process, using inputs from the light-front constituent quark model and the spectator model. The implementation of TMD evolution for all asymmetries at Next-to-Leading Logarithmic precision is a first in this field. Results are in line with experimental data, aiding in data interpretation and future model assessment.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
B. I. Ermolaev, S. I. Troyan
Summary: The calculation of F-L in the double-logarithmic approximation demonstrates the synergic effect of the factor 1/x from the alpha s2-order and the steep x-dependence of the totally resummed double logarithmic contributions, ensuring the power-like rise of F-L at small x and arbitrary Q(2).
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
