Chris A. Flett
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View article: Phenomenological studies of exclusive heavy-quarkonium electroproduction at NLO
Phenomenological studies of exclusive heavy-quarkonium electroproduction at NLO Open
Using the next-to-leading order (NLO) coefficient functions for exclusive electroproduction of heavy vector mesons derived in our previous work, we perform various phenomenological studies of exclusive electroproduction in $ep$ collisions …
View article: Transition Form-Factor for $η_Q$ at NNLO in the strong coupling $α_s$ and with all-order $v^2$ resummation
Transition Form-Factor for $η_Q$ at NNLO in the strong coupling $α_s$ and with all-order $v^2$ resummation Open
In this work, we discuss both relativistic and perturbative QCD corrections to the transition form-factor ${\cal F}_{η_Q}{(t_1,t_2)}$ for the process $γ^*(q_1) γ^*(q_2) \leftrightarrow η_Q(P)$ with dependencies on the normalised photon vir…
View article: Physics with high-luminosity proton-nucleus collisions at the LHC<sup>∗</sup>
Physics with high-luminosity proton-nucleus collisions at the LHC<sup>∗</sup> Open
The physics case for the operation of high-luminosity proton-nucleus ( pA ) collisions at the CERN LHC is reviewed. The collection of (1–10 pb −1 ) of proton-lead ( p Pb) collisions at the LHC will provide unique physics opportunities in…
View article: A method to include exclusive heavy vector-meson production data at small x in global parton analyses
A method to include exclusive heavy vector-meson production data at small x in global parton analyses Open
View article: Physics case for quarkonium studies at the Electron Ion Collider
Physics case for quarkonium studies at the Electron Ion Collider Open
View article: Complete 1-loop study of exclusive 𝑱/𝝍 and 𝚼 photoproduction with full GPD evolution
Complete 1-loop study of exclusive 𝑱/𝝍 and 𝚼 photoproduction with full GPD evolution Open
View article: Impact studies of the gluon PDF using exclusive heavy-quarkonium production data
Impact studies of the gluon PDF using exclusive heavy-quarkonium production data Open
View article: Prospective report of the French QCD community to the ESPPU 2025 with respect to the program of the LHC Run 5 and beyond and future colliders at CERN
Prospective report of the French QCD community to the ESPPU 2025 with respect to the program of the LHC Run 5 and beyond and future colliders at CERN Open
This document summarizes the prospective physics plans of the French QCD and Heavy-Ion community, including the experimental programs at the LHC Run 5 and beyond and future colliders at CERN, within the context of the French contribution t…
View article: Exclusive vector-quarkonium photoproduction at NLO in α in collinear factorisation with evolution of the generalised parton distributions and high-energy resummation
Exclusive vector-quarkonium photoproduction at NLO in α in collinear factorisation with evolution of the generalised parton distributions and high-energy resummation Open
International audience
View article: Complete 1-loop study of exclusive $ J/ψ$ and $ Υ$ photoproduction with full GPD evolution
Complete 1-loop study of exclusive $ J/ψ$ and $ Υ$ photoproduction with full GPD evolution Open
We discuss the exclusive photoproduction of a heavy vector quarkonium, namely $J/ψ$ and $Υ$ at 1-loop in $α_s$. In collinear factorisation (CF), the amplitude for such a process is obtained by the convolution of a hard partonic sub-amplitu…
View article: Exclusive vector-quarkonium photoproduction at NLO in alpha_s in collinear factorisation with evolution of the generalised parton distributions and high-energy resummation
Exclusive vector-quarkonium photoproduction at NLO in alpha_s in collinear factorisation with evolution of the generalised parton distributions and high-energy resummation Open
We perform the first complete one-loop study of exclusive photoproduction of vector quarkonia off protons in Collinear Factorisation (CF) including the scale evolution of the Generalised Parton Distributions (GPDs). We confirm the perturba…
View article: Physics case for quarkonium studies at the Electron Ion Collider
Physics case for quarkonium studies at the Electron Ion Collider Open
The physics case for quarkonium-production studies accessible at the US Electron Ion Collider is described.
View article: A method to include exclusive heavy vector-meson production data at small $x$ in global parton analyses
A method to include exclusive heavy vector-meson production data at small $x$ in global parton analyses Open
We propose a method which allows the inclusion of exclusive heavy vector-meson production data at low $x$ in future global parton analyses. As an example we perform a study within xFitter to determine the gluon parton distribution function…
View article: QCD challenges from pp to AA collisions: 4th edition
QCD challenges from pp to AA collisions: 4th edition Open
View article: Implications of exclusive J/$\psi$ photoproduction in a tamed collinear factorisation approach to NLO
Implications of exclusive J/$\psi$ photoproduction in a tamed collinear factorisation approach to NLO Open
We discuss exclusive J/ \psi photoproduction, initially in conventional collinear factorisation at NLO and then subsequently in a refined approach with a programme of low x resummation and implementation of a crucial low Q_0 subtract…
View article: Exclusive quarkonium photoproduction in $A$+$A$ UPCs at the LHC in NLO pQCD
Exclusive quarkonium photoproduction in $A$+$A$ UPCs at the LHC in NLO pQCD Open
We present the first study of coherent exclusive quarkonium (J/ψ, Υ) photoproduction in ultraperipheral nucleus-nucleus collisions (UPCs) at the LHC in the framework of collinear factorization and next-to-leading order (NLO) perturbative Q…
View article: QCD challenges from pp to AA collisions -- 4th edition
QCD challenges from pp to AA collisions -- 4th edition Open
This paper is a write-up of the ideas that were presented, developed and discussed at the fourth International Workshop on QCD Challenges from pp to AA, which took place in February 2023 in Padua, Italy. The goal of the workshop was to foc…
View article: Erratum: Next-to-leading order perturbative QCD predictions for exclusive <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>J</mml:mi><mml:mo>/</mml:mo><mml:mi>ψ</mml:mi></mml:mrow></mml:math> photoproduction in oxygen-oxygen and lead-lead collisions at energies available at the CERN Large Hadron Collider [Phys. Rev. C <b>107</b>, 044912 (2023)]
Erratum: Next-to-leading order perturbative QCD predictions for exclusive photoproduction in oxygen-oxygen and lead-lead collisions at energies available at the CERN Large Hadron Collider [Phys. Rev. C <b>107</b>, 044912 (2023)] Open
Received 19 October 2023DOI:https://doi.org/10.1103/PhysRevC.108.069901Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintai…
View article: Predictions for exclusive $$\varUpsilon $$ photoproduction in ultraperipheral $${\textrm{Pb}}+{\textrm{Pb}}$$ collisions at the LHC at next-to-leading order in perturbative QCD
Predictions for exclusive $$\varUpsilon $$ photoproduction in ultraperipheral $${\textrm{Pb}}+{\textrm{Pb}}$$ collisions at the LHC at next-to-leading order in perturbative QCD Open
We present predictions for the rapidity-differential cross sections of exclusive $$\varUpsilon $$ photoproduction in ultraperipheral collisions (UPCs) of lead ions at the Large Hadron Collider (LHC). We work in the framework of collinear…
View article: Next-to-leading order perturbative QCD predictions for exclusive <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>J</mml:mi><mml:mo>/</mml:mo><mml:mi>ψ</mml:mi></mml:mrow></mml:math> photoproduction in oxygen-oxygen and lead-lead collisions at energies available at the CERN Large Hadron Collider
Next-to-leading order perturbative QCD predictions for exclusive photoproduction in oxygen-oxygen and lead-lead collisions at energies available at the CERN Large Hadron Collider Open
International audience
View article: Exclusive heavy vector meson photoproduction on nuclei in NLO perturbative QCD
Exclusive heavy vector meson photoproduction on nuclei in NLO perturbative QCD Open
We make predictions for the cross section of coherent $J/ψ$ photoproduction in Pb-Pb and O-O ultraperipheral collisions (UPCs) at the LHC as a function of the $J/ψ$ rapidity $y$ in the framework of collinear factorization and next-to-leadi…
View article: Report on 2209.15277v1
Report on 2209.15277v1 Open
We discuss exclusive J/ψ photoproduction, initially in conventional collinear factorisation at NLO and then subsequently in a refined approach with a programme of low x resummation and implementation of a crucial low Q 0 subtraction includ…
View article: Exclusive Heavy Vector Meson Photoproduction on Nuclei in NLO Perturbative QCD
Exclusive Heavy Vector Meson Photoproduction on Nuclei in NLO Perturbative QCD Open
We make predictions for the cross section of coherent J/ψ photoproduction in Pb–Pb and O–O ultraperipheral collisions (UPCs) at the LHC as a function of the J/ψ rapidity y in the framework of collinear factorization and next-to-leading ord…
View article: Towards the phenomenological implications of the Physical Scheme in PDF fits
Towards the phenomenological implications of the Physical Scheme in PDF fits Open
Proceedings for DIS2022
View article: Exclusive <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>J</mml:mi><mml:mo>/</mml:mo><mml:mi>ψ</mml:mi></mml:mrow></mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi mathvariant="normal">ϒ</mml:mi></mml:mrow></mml:math> production in high-energy <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>p</mml:mi><mml:mi>p</mml:mi></mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>p</mml:mi></mml:math>-Pb collisions
Exclusive and production in high-energy and -Pb collisions Open
We present a formalism for determining the cross section for exclusive heavy vector meson production (J/psi, gamma) as a function of rapidity, in both high-energy proton-proton and proton-heavy ion collisions, at next-to-leading order in Q…
View article: Implications of exclusive $J/ψ$ photoproduction in a tamed collinear factorisation approach to NLO
Implications of exclusive $J/ψ$ photoproduction in a tamed collinear factorisation approach to NLO Open
We discuss exclusive $J/ψ$ photoproduction, initially in conventional collinear factorisation at NLO and then subsequently in a refined approach with a programme of low $x$ resummation and implementation of a crucial low $Q_0$ subtraction …
View article: Exclusive J/Psi photoproduction in ultraperipheral Pb+Pb collisions to NLO pQCD
Exclusive J/Psi photoproduction in ultraperipheral Pb+Pb collisions to NLO pQCD Open
Proceedings of DIS2022.
View article: Exclusive <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>J</mml:mi><mml:mo>/</mml:mo><mml:mi>ψ</mml:mi></mml:mrow></mml:math> photoproduction in ultraperipheral Pb+Pb collisions at the CERN Large Hadron Collider calculated at next-to-leading order perturbative QCD
Exclusive photoproduction in ultraperipheral Pb+Pb collisions at the CERN Large Hadron Collider calculated at next-to-leading order perturbative QCD Open
We present the first next-to-leading-order (NLO) perturbative QCD (pQCD) study of rapidity-differential cross sections of coherent exclusive photoproduction of J/psi mesons in heavy-ion ultraperipheral collisions (UPCs) at the CERN Large H…
View article: Towards the phenomenological implications of the Physical Scheme in PDF fits
Towards the phenomenological implications of the Physical Scheme in PDF fits Open
We describe the impact on PDF extractions of the 'Physical Scheme', a heavy-quark mass scheme that accounts for the effects of intrinsic heavy-quarks and provides a way to smoothly transition over the heavy-quark thresholds. The modificati…
View article: Next-to-leading order QCD predictions for exclusive $J/ψ$ photoproduction in ultraperipheral Pb+Pb collisions at the LHC
Next-to-leading order QCD predictions for exclusive $J/ψ$ photoproduction in ultraperipheral Pb+Pb collisions at the LHC Open
We present the first study of rapidity-differential cross sections of coherent exclusive $J/ψ$ photoproduction in heavy-ion ultraperipheral collisions (UPCs) at the LHC, $\text{d}σ(\text{Pb}+\text{Pb}\rightarrow \text{Pb}+J/ψ+\text{Pb})/\t…