Jets produced in high energy collisions offer an excellent QCD laboratory. Jet substructure encodes QCD dynamics ranging from the initial partonic shower in the weakly coupled limit to hadronization in the strongly coupled, non-perturbative, regime. Energy correlators, which measure statistical correlations of the energy flux within a jet, are a means to separate the different scales. Defined...
A survey is given on the 3-loop unpolarized and polarized heavy flavor corrections to DIS with reference to the kinematics at HERA, LHC and EIC.
With the project to build a future Electron-Ion Collider (EIC) in the USA, equipped with a new state-of-the-art detector (ePIC), we are now preparing for the next step in precision studies of QCD.
The EIC will be the only new high-energy collider world-wide in the next twenty-thirty years. Electrons and ions, from p up to U, will collide at high luminosity on a large range of center-of-mass...
Precision physics, both at the LHC and at the EIC, requires to control the evolution of the Parton Distribution Functions to 1% accuracy. To achieve this target, we must compute the splitting kernels of the Dokshitzer-Gribov-Lipatov-Altarelli-Parisi equations to four loops in QCD. Recently, there has been significant progress towards this goal. I report the results obtained in the framework of...
We consider the extension of the MSHT20 PDFs to approximate N3LO order. We describe the inclusion of the known N3LO information and the parameterisation of the remaining missing N3LO contributions, as well as the determination of the theoretical uncertainties from missing pieces and their interpretation. We then examine the impact on the PDFs as well as on predicted cross-sections. Finally, if...
We extend the existing next-to-next-to-leading (NNLO) NNPDF sets of parton distributions to approximate next-to-next-to-next-to-leading N3LO, as required by the recent availability of an increasing number of computations of scattering processes at this order.
Given the lack of full knowledge of the N3LO splitting functions, we construct an approximation to them which includes all the...
J/ψ-pair production at the LHC is currently the most promising tool to probe the unknown gluon transverse momentum distributions. Data from LHCb at low transverse momenta was already available and recently more data has been released.
In this presentation, I will revise previous theoretical results by discussing predictions of transverse-momentum distributions at invariant J/ψ-pair masses...
Abstract
In this talk we discuss how multi parton interactions (MPI), usually studied in hadron-hadron collisions, e.g. at the LHC, could be observed also at the future Electron Ion Collider (EIC). As we will show, MPI studies could represent an additional ”synergy” between LHC and EIC aimed to investigate the partonic structure of hadrons. Our first
analysis [3] has been inspired by the...
Proton-proton collisions at the LHC generate a high-intensity collimated beam of neutrinos in the forward direction, up to energies of several TeV. The observation of these neutrinos by FASER$\nu$ and SND@LHC, and the proposal of a purpose-built Forward Physics Facility (FPF) for the High-Luminosity LHC (HL-LHC), motivate scientific inquiries of this hitherto unavailable particle beam. The...
The underlying event in photon-initiated processes has been investigated. This has been extensively studied in proton-proton ($pp$) and proton-antiproton ($p\bar{p}$) collisions where models of the underlying event can describe data in such collisions over a wide phase-space, including the large range in energy. This leads to a single set of parameters for a given model that can be used to...
ePIC is the EIC project detector designed to cope with the whole physics scope at EIC. It is the result of a more than ten year-long effort, which includes a set of preliminary detector concepts, a robust and articulated R&D program, two advanced detector architectures presented in 2021 as response to a call by the EIC hosting laboratories. More recently, a consolidation and optimization...
Forward pp and p+A measurements at the LHC probe the same QCD dipole scattering amplitudes as ep and e+A measurements at the EIC, and a comprehensive search for non-linear QCD evolution effects (“saturation”) requires extensive measurements at both facilities. The ALICE Forward Calorimeter upgrade (FoCal) provides a key element in this program. FoCal is a highly-granular forward calorimeter,...
In this contribution I would like to report on our recent computation [1,2] on exclusive C-even charmonia productions in high-energy electron-proton collisions. The C-even charmonia states serve as a probe of the odderon amplitude in the proton which is an off-forward generalized transverse momentum distribution formed by at least three gluons in a C-odd state. We are motivated by the odderon...
I am going to present phenomenological predictions for cross section for forward jest production within ITMD factorization both for future FoCal calorimeter as well as for EIC. Besides that, I will discuss the recent description of hadronic entropy in inclusive as well as diffractive DIS.
In this talk, I will present our recent results for the kinematic corrections beyond the twist-four accuracy to the
deeply-virtual Compton scattering (DVCS) of a spin-1/2 target. Phenomenologically, such corrections are crucial for
removing the reference frame dependence when extracting the generalized parton distribution (GPD) from experimental
data. Theoretically, the kinematic...
We give an overview of recent developments in the computation of the anomalous dimension matrix of composite operators in non-forward kinematics. The elements of this matrix determine the scale dependence of non-perturbative parton distributions, such as GPDs, and hence constitute important input for phenomenological studies of exclusive processes like deeply-virtual Compton scattering....
The measurement of coherent diffractive Vector-Meson (VM) production sheds light on the internal structure of nuclei - probing the gluon density and saturation phenomena. However, the incoherent VM photoprduction serves as a substantial background to these measurements. In my talk, I will discuss these challenges, emphasizing the parallels as they pertain to both the LHC and EIC.
The LHeC is the proposal of an energy recovery linac built at CERN to provide 30-50 GeV electrons to collide with the HL-LHC beams beyond LS5. It would study DIS in the TeV regime, with instantaneous luminosities around $10^{34}$ ($10^{33}$) in electron-proton (electron-nucleus) mode. The corresponding detector could be designed solely for the ep/eA modes or being able to study also pp/pA/AA...
