Daniël Boer
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View article: Impact of the TMD shape function on matching the transverse momentum spectrum in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mi>J</mml:mi> <mml:mo>/</mml:mo> <mml:mi>ψ</mml:mi> </mml:math> production at the EIC
Impact of the TMD shape function on matching the transverse momentum spectrum in production at the EIC Open
The impact of the inclusion of transverse-momentum-dependent (TMD) shape functions on the transverse momentum spectrum in J / ψ production at the electron-ion collider (EIC) is investigated by considering the matching of the TMD factoriz…
View article: The impact of the TMD shape function on matching the transverse momentum spectrum in $J/ψ$ production at the EIC
The impact of the TMD shape function on matching the transverse momentum spectrum in $J/ψ$ production at the EIC Open
The impact of the inclusion of TMD shape functions on the transverse momentum spectrum in $J/ψ$ production at the EIC is investigated by considering the matching of the TMD factorization description at low transverse momentum with the coll…
View article: Azimuthal asymmetries in lepton and heavy-quark pair production in UPCs
Azimuthal asymmetries in lepton and heavy-quark pair production in UPCs Open
A bstract Azimuthal modulations in lepton and heavy-quark pair production in ultraperipheral collisions (UPCs) of highly charged ions are investigated. The modulations in the azimuthal angles of the sum and difference of the transverse mom…
View article: Azimuthal asymmetries in lepton and heavy-quark pair production in UPCs
Azimuthal asymmetries in lepton and heavy-quark pair production in UPCs Open
Azimuthal modulations in lepton and heavy-quark pair production in ultraperipheral collisions (UPCs) of highly charged ions are investigated. The modulations in the azimuthal angles of the sum and difference of the transverse momenta of th…
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: J/psi-pair production at NLL in TMD factorisation at the LHC
J/psi-pair production at NLL in TMD factorisation at the LHC Open
J/psi-pair production at the LHC is currently one of the few tools available to probe gluon transverse momentum distributions (TMDs). In this context, data from LHCb in the collider mode have the potential to probe the evolution of the unp…
View article: $J/\psi-$pair production at NLL in TMD factorisation at the LHC
$J/\psi-$pair production at NLL in TMD factorisation at the LHC Open
J/psi-pair production at the LHC is currently one of the few tools available\nto probe gluon transverse momentum distributions (TMDs). In this context, data\nfrom LHCb in the collider mode have the potential to probe the evolution of the\n…
View article: Probing gluon GTMDs through exclusive coherent diffractive processes
Probing gluon GTMDs through exclusive coherent diffractive processes Open
We extend a previous GTMD model to improve the description of the HERA data on diffractive dijet production, and include exclusive coherent diffractive $$J/\psi $$ production data. We find that within our gluon GTMD model context and …
View article: Transverse momentum dependent shape function for J/ψ production in SIDIS
Transverse momentum dependent shape function for J/ψ production in SIDIS Open
A bstract It has been shown previously that the transverse momentum dependent (TMD) factorization of heavy quarkonium production requires a TMD shape function. Its perturbative tail can be extracted by matching the cross sections valid at …
View article: The case for an EIC Theory Alliance: Theoretical Challenges of the EIC
The case for an EIC Theory Alliance: Theoretical Challenges of the EIC Open
We outline the physics opportunities provided by the Electron Ion Collider (EIC). These include the study of the parton structure of the nucleon and nuclei, the onset of gluon saturation, the production of jets and heavy flavor, hadron spe…
View article: Transverse momentum dependent shape function for $J/ψ$ production in SIDIS
Transverse momentum dependent shape function for $J/ψ$ production in SIDIS Open
It has been shown previously that the transverse momentum dependent (TMD) factorization of heavy quarkonium production requires a TMD shape function. Its perturbative tail can be extracted by matching the cross sections valid at low and hi…
View article: The Case for an EIC Theory Alliance
The Case for an EIC Theory Alliance Open
This documents outlines the case for the creation of an EIC Theory Alliance. The EIC will be a unique and versatile facility that will enable the understanding of some of the most compelling questions in the physics of the strong nuclear f…
View article: Probing gluon GTMDs through exclusive coherent diffractive processes
Probing gluon GTMDs through exclusive coherent diffractive processes Open
We extend a previous GTMD model to improve the description of the HERA data on diffractive dijet production, and include exclusive coherent diffractive $J/ψ$ production data. We find that within our gluon GTMD model context and assumptions…
View article: Competition between diffusion and rapid expansion andits impact on critical fluctuations in heavy-ion collisions.
Competition between diffusion and rapid expansion andits impact on critical fluctuations in heavy-ion collisions. Open
We study the impact of the competition between the expansion of the medium\ncreated in heavy-ion collisions and its diffusive properties on the critical\nfluctuations of the net-baryon density. As the relaxation time of the\nfluctuations i…
View article: Scale evolution of T-odd gluon TMDs at small <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>x</mml:mi></mml:math>
Scale evolution of T-odd gluon TMDs at small Open
We study the transverse momentum dependent (TMD) evolution of the three leading twist dipole type T-odd gluon TMDs inside a transversely polarized nucleon, all of which at small x dynamically originate from the spin dependent odderon. Thei…
View article: TMD Evolution Study of the $\\cos 2 \\phi$ Azimuthal Asymmetry in\n Unpolarized $J/\\psi$ Production at EIC
TMD Evolution Study of the $\\cos 2 \\phi$ Azimuthal Asymmetry in\n Unpolarized $J/\\psi$ Production at EIC Open
Semi-inclusive $J/\\psi$ production in electron-proton collisions is a\npromising process to study gluon transverse momentum distributions (TMDs) at\nthe future Electron-Ion Collider. In this article, we improve on previous\nstudies of the…
View article: Energy evolution of T-odd gluon TMDs at small $x$
Energy evolution of T-odd gluon TMDs at small $x$ Open
We study the energy or TMD evolution of the three leading twist dipole type T-odd gluon TMDs inside a transversely polarized nucleon, all of which at small $x$ dynamically originate from the spin dependent odderon. Their energy dependence …
View article: A Unified View on Geometric Phases and Exceptional Points in Adiabatic Quantum Mechanics
A Unified View on Geometric Phases and Exceptional Points in Adiabatic Quantum Mechanics Open
We present a formal geometric framework for the study of adiabatic quantum mechanics for arbitrary finite-dimensional non-degenerate Hamiltonians. This framework generalizes earlier holonomy interpretations of the geometric phase to non-cy…
View article: GTMD model predictions for diffractive dijet production at EIC
GTMD model predictions for diffractive dijet production at EIC Open
In this paper we consider a small-$x$ model for gluon GTMDs that we fit to data on diffractive dijet production in electron-proton collisions obtained by HERA's H1 Collaboration. Assuming a small number of free parameters, each with a phys…
View article: Hierarchy problem and fine-tuning in a decoupling approach to multiscale effective potentials
Hierarchy problem and fine-tuning in a decoupling approach to multiscale effective potentials Open
In many realizations of beyond the Standard Model theories, new massive particles are introduced, leading to a multiscale system with widely separated energy scales. In this setting the Coleman-Weinberg effective potential, which describes…
View article: Extracting color octet NRQCD matrix elements from <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>J</mml:mi><mml:mo stretchy="false">/</mml:mo><mml:mi>ψ</mml:mi></mml:math> production at the EIC
Extracting color octet NRQCD matrix elements from production at the EIC Open
Recently unpolarized and polarized J/ψ(Y) production at the Electron-Ion Collider (EIC) has been proposed as a new way to extract two poorly known color-octet NRQCD long-distance matrix elements: 〈0|O8J/ψ(S01)|0〉 and 〈0|O8J/ψ(P03)|0〉. The …
View article: Science Requirements and Detector Concepts for the Electron-Ion Collider: EIC Yellow Report
Science Requirements and Detector Concepts for the Electron-Ion Collider: EIC Yellow Report Open
This report describes the physics case, the resulting detector requirements,\nand the evolving detector concepts for the experimental program at the\nElectron-Ion Collider (EIC). The EIC will be a powerful new high-luminosity\nfacility in …
View article: J/ψ meson production in SIDIS: matching high and low transverse momentum
J/ψ meson production in SIDIS: matching high and low transverse momentum Open
A bstract We consider the transverse momentum spectrum and the cos 2 ϕ azimuthal distribution of J / ψ mesons produced in semi-inclusive, deep-inelastic electron-proton scattering, where the electron and the proton are unpolarized. At low …
View article: $J/\psi$ meson production in SIDIS: matching high and low transverse momentum
$J/\psi$ meson production in SIDIS: matching high and low transverse momentum Open
We consider the transverse momentum spectrum and the $\cos 2\phi$ azimuthal distribution of $J/\psi$ mesons produced in semi-inclusive, deep-inelastic electron-proton scattering, where the electron and the proton are unpolarized. At low tr…