535 citations · 682 across the 32 of their papers we have counts for
33 papers
Theory updates for parton distributions in Hessian formalism
Petja Paakkinen, Hannu Paukkunen, Sami Yrjänheikki
We present a new extension to the toolbox of parton-distribution reweighting methods, which enables a general user to study the impact of an updated theory prediction on the result…
Nuclear parton distributions and nuclear shadowing
Petja Paakkinen, Vadim Guzey
In this contribution, we review the physics and phenomenology of nuclear parton distribution functions (PDFs), with a particular focus on the small-x region of nuclear shadowing. W…
A compendium of cold-nuclear matter baseline predictions in light-ion collisions
Florian Jonas, Constantin Loizides, Aleksas Mazeliauskas +2
The recent light-ion collision programme at RHIC and the LHC provides a unique opportunity to investigate the onset of quark-gluon plasma formation and parton energy loss in small…
Scaling properties of nuclear parton distributions in short-range-correlation motivated two-component parametrization
Petja Paakkinen
We provide some critical remarks on the recently proposed two-component parametrization of nuclear parton distribution functions, which was motivated by the apparent correlation be…
Road map for the tuning of hadronic interaction models with accelerator-based and astroparticle data
Johannes Albrecht, Julia Becker Tjus, Noah Behling +52
In high-energy and astroparticle physics, event generators play an essential role, even in the simplest data analyses. As analysis techniques become more sophisticated, e.g. based…
Hard probes and nuclear PDFs
Petja Paakkinen
A mini-review on the status of global analyses of nuclear parton distribution functions is given, focusing on the most relevant constraints for the hard-probes phenomenology in ult…
The ECFA Early-Career Researchers Panel: Report for the year 2023
Julia Allen, Bruno Alves, Jan-Hendrik Arling +67
The European Committee for Future Accelerators (ECFA) Early-Career Researcher (ECR) panel, which represents the interests of the ECR community to ECFA, presents in this document it…
Dijet photoproduction and transverse-plane geometry in ultra-peripheral nucleus-nucleus collisions
Kari J. Eskola, Vadim Guzey, Ilkka Helenius +2
We present new NLO pQCD predictions for the inclusive photoproduction of dijets in ultra-peripheral (UPC) lead-lead collisions at 5.02 TeV with a realistic impact-parameter depende…
Collision geometry in UPC dijet production
Kari J. Eskola, Vadim Guzey, Ilkka Helenius +2
We present a comprehensive NLO pQCD study on inclusive dijet photoproduction in ultraperipheral nucleus-nucleus collisions (UPCs). Our analysis takes into account the finite size o…
Spatial resolution of dijet photoproduction in near-encounter ultraperipheral nuclear collisions
Kari J. Eskola, Vadim Guzey, Ilkka Helenius +2
We present next-to-leading order perturbative QCD predictions for inclusive dijet photoproduction in ultra-peripheral nucleus-nucleus collisions (UPCs) within the impact-parameter…
QCD challenges from pp to AA collisions -- 4th edition
Javira Altmann, Carlota Andres, Anton Andronic +57
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 Februar…
Illuminating the impact-parameter dependence of UPC dijet photoproduction
Kari J. Eskola, Vadim Guzey, Ilkka Helenius +2
We present new NLO pQCD predictions for photoproduction of dijets in ultraperipheral PbPb collisions at 5.02 TeV with a realistic photon flux and up-to-date nuclear PDFs. Our calcu…
Nuclear PDFs at the beginning of LHC Run 3
Petja Paakkinen
Nuclear parton distribution functions (nuclear PDFs), collinearly factorizable in perturbative QCD (pQCD), are currently extracted most reliably from global analyses of experimenta…
Constraining PDFs and nPDFs with recent data
Petja Paakkinen
The progress in constraining proton and nuclear parton distribution functions is briefly summarised. Some persistent uncertainties are pointed out and recent experimental advanceme…
Proton-PDF uncertainties in extracting nuclear PDFs from production in p+Pb collisions
Kari J. Eskola, Petja Paakkinen, Hannu Paukkunen +1
We discuss the recent CMS Collaboration measurement of boson production in p+Pb collisions at 8.16 TeV in terms of the constraining power on nuclear parton distribution fun…
EPPS21: A global QCD analysis of nuclear PDFs
Kari J. Eskola, Petja Paakkinen, Hannu Paukkunen +1
We present an updated global analysis of collinearly factorized nuclear parton distribution functions (PDFs) at next-to-leading order in perturbative QCD. In comparison to our prev…
Light-nuclei gluons from dijet production in proton-oxygen collisions
Petja Paakkinen
The prospects of measuring a single-differential dijet cross section during the proposed short proton-oxygen data taking at LHC Run 3 are studied using next-to-leading-order pertur…
Towards EPPS21 nuclear PDFs
Kari J. Eskola, Petja Paakkinen, Hannu Paukkunen +1
We report on the progress in updating our global analysis of nuclear PDFs. In particular, we will discuss the inclusion of double differential 5.02 TeV dijet and D-meson measuremen…
Impact of dijet and D-meson data from 5.02 TeV p+Pb collisions on nuclear PDFs
Kari J. Eskola, Ilkka Helenius, Petja Paakkinen +1
We discuss the new constraints on gluon parton distribution function (PDF) in lead nucleus, derivable with the Hessian PDF reweighting method from the 5.02 TeV p+Pb measurements of…
New constraints for nuclear parton distribution functions from hadron-nucleus collision processes
Petja Paakkinen
This work studies collinearly factorizable nuclear parton distribution functions (nPDFs) in perturbative Quantum Chromodynamics (QCD) at next-to-leading order in the light of hadro…
Constraints for nuclear PDFs from the LHCb D-meson data
Kari J. Eskola, Ilkka Helenius, Petja Paakkinen +1
We quantify the impact of LHCb D-meson measurements at on the EPPS16 and nCTEQ15 nuclear PDFs. In our study, the theoretical description of D-meson produc…
A QCD analysis of LHCb D-meson data in p+Pb collisions
Kari J. Eskola, Ilkka Helenius, Petja Paakkinen +1
We scrutinize the recent LHCb data for D-meson production in p+Pb collisions within a next-to-leading order QCD framework. Our calculations are performed in the SACOT-$m_{\rm T…
Nuclear gluons at RHIC in a multi-observable approach
Ilkka Helenius, John Lajoie, Joseph D. Osborn +2
We explore the possibility of measuring nuclear gluon distributions at the Relativistic Heavy-Ion Collider (RHIC) with proton-nucleus collisions. In add…
Non-quadratic improved Hessian PDF reweighting and application to CMS dijet measurements at 5.02 TeV
Kari J. Eskola, Petja Paakkinen, Hannu Paukkunen
Hessian PDF reweighting, or "profiling", has become a widely used way to study the impact of a new data set on parton distribution functions (PDFs) with Hessian error sets. The ava…