Unveiling the proton structure via transverse-momentum-dependent gluon distributions

Bacchetta, Alessandro; Celiberto, Francesco Giovanni; Radici, Marco

doi:10.31349/suplrevmexfis.3.0308108

Cited by 8 publications

(6 citation statements)

References 79 publications

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“…Then, as highlighted by model studies of leading-twist gluon TMD PDFs [241,418] (see also Refs. [419][420][421][422][423][424][425][426][427][428][429][430][431][432]), the distribution of linearly-polarized gluons can induce spin effects even in collisions of unpolarized hadrons. The latters, collectively known as the Boer-Mulders effect, were first observed in the case of quark polarization [433][434][435][436]).…”

Section: Toward Precision Studies Of High-energy Qcdmentioning

confidence: 99%

Forward & Far-Forward Heavy Hadrons with Jethad: A High-Energy Viewpoint

Celiberto

2024

Particles

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Inspired by recent findings that semi-inclusive detections of heavy hadrons exhibit fair stabilization patterns in high-energy resummed distributions against (missing) higher-order corrections, we review and extend our studies on the hadroproduction of light and heavy hadrons tagged in forward and far-forward rapidity ranges. We analyze the NLL/NLO+ behavior of rapidity rates and angular multiplicities via the Jethad method, where the resummation of next-to-leading energy logarithms and beyond is consistently embodied in the collinear picture. We explore kinematic regions that are within LHC typical acceptances, as well as novel sectors accessible thanks the combined tagging of a far-forward light or heavy hadron at future Forward Physics Facilities and a of central particle at LHC experiments via a precise timing-coincidence setup.

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Section: Toward Precision Studies Of High-energy Qcdmentioning

confidence: 99%

Forward & Far-Forward Heavy Hadrons with Jethad: A High-Energy Viewpoint

Celiberto

2024

Particles

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“…Gold-standard channels for the testing of the UGD are the exclusive light vector-meson leptoproduction at HERA [151][152][153][154][155][328][329][330][331] and the EIC [156,[332][333][334][335], the exclusive quarkonium photoemission [162,336,337], and the inclusive detection of Drell-Yan dilepton systems [157][158][159]338]. Then, the information on the gluon content at small x carried by the BFKL UGD has allowed us to enhance the collinear description via the first determination of small-x resummed PDFs [339][340][341], as well as to model low-x improved gluon TMD densities at leading twist, namely within the lowest level of the operator product expansion of the gluon correlator [342][343][344][345][346][347][348][349][350]. We refer to Refs.…”

Section: A Glance At High-energy Qcd Phenomenologymentioning

confidence: 99%

Vector Quarkonia at the LHC with Jethad: A High-Energy Viewpoint

Celiberto

2023

Universe

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In this review, we discuss and extend the study of the inclusive production of vector quarkonia, J/ψ and Υ, emitted with large transverse momenta and rapidities at the LHC. We adopt the novel ZCW19+ determination of fragmentation functions to depict the quarkonium production mechanism at the next-to-leading level of perturbative QCD. This approach is based on the nonrelativistic QCD formalism well adapted to describe the formation of a quarkonium state from the collinear fragmentation of a gluon or a constituent heavy quark at the lowest energy scale. We rely upon the NLL/NLO+ hybrid high-energy and collinear factorization for differential cross-sections, where the collinear formalism is enhanced by the BFKL resummation of next-to-leading energy logarithms arising in the t-channel. We employ the method to analyze the behavior of the rapidity distributions for double-inclusive vector quarkonium and inclusive vector quarkonium plus jet emissions. We discover that the natural stability of the high-energy series, previously seen in observables sensitive to the emission of hadrons with heavy flavor detected in the rapidity acceptance of LHC barrel calorimeters, becomes even more manifest when these particles are tagged in forward regions covered by endcaps. Our findings present the important message that vector quarkonia at the LHC via hybrid factorization offer a unique chance to perform precision studies of high-energy QCD, as well as an intriguing opportunity to shed light on the quarkonium production puzzle.

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“…Preliminary calculations of leading-twist T-odd functions were presented in Refs. [691][692][693][694].…”

Section: Gluon Tmd Pdfsmentioning

confidence: 99%

Snowmass 2021 Whitepaper: Proton Structure at the Precision Frontier

Amoroso¹,

Apyan²,

Armesto³

et al. 2022

Acta Phys. Pol. B

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An overwhelming number of theoretical predictions for hadron colliders require parton distribution functions (PDFs), which are an important ingredient of theory infrastructure for the next generation of high-energy experiments. This whitepaper summarizes the status and future prospects for determination of high-precision PDFs applicable in a wide range of energies and experiments, in particular in precision tests of the Standard Model and in new physics searches at the high-luminosity Large Hadron Collider and Electron-Ion Collider. We discuss the envisioned advancements in experimental measurements, QCD theory, global analysis methodology, and computing that are necessary to bring unpolarized PDFs in the nucleon to the N2LO and N3LO accuracy in the QCD coupling strength. Special attention is given to the new tasks that emerge in the era of the precision PDF analysis, such as those focusing on the robust control of systematic factors both in experimental measurements and theoretical computations. Various synergies between experimental and theoretical studies of the hadron structure are explored, including opportunities for studying PDFs for nuclear and meson targets, PDFs with electroweak contributions or dependence on the transverse momentum, for incisive comparisons between phenomenological models for the PDFs and computations on discrete lattice, and for cross-fertilization with machine learning/AI approaches.

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Unveiling the proton structure via transverse-momentum-dependent gluon distributions

Cited by 8 publications

References 79 publications

Forward & Far-Forward Heavy Hadrons with Jethad: A High-Energy Viewpoint

Forward & Far-Forward Heavy Hadrons with Jethad: A High-Energy Viewpoint

Vector Quarkonia at the LHC with Jethad: A High-Energy Viewpoint

Snowmass 2021 Whitepaper: Proton Structure at the Precision Frontier

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