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Related papers: Dijets in p+Pb collisions and their quantitative c…

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Inspired by the recent measurements of the CMS collaboration, we report a QCD study of dijet production in proton+lead collisions at the LHC involving large-transverse-momentum jets, $p_T \gtrsim 100$ GeV. Examining the inherent…

High Energy Physics - Phenomenology · Physics 2015-06-17 Kari J. Eskola , Hannu Paukkunen , Carlos A. Salgado

As the current nuclear PDF analyses are mainly constrained by fixed-target Drell-Yan and deeply inelastic scattering data only the quark nuclear modifications at fairly large $x$ values are in a good control. Inclusive pion production in…

High Energy Physics - Phenomenology · Physics 2015-10-02 Ilkka Helenius , Hannu Paukkunen , Kari J. Eskola

We quantify the impact of LHC dijet production measurements on the nNNPDF2.0 nuclear PDFs in twofold. First, from a proton baseline based on NNPDF3.1 and augmented by pp dijet production measurements from ATLAS and CMS at 7 and 8 TeV.…

High Energy Physics - Phenomenology · Physics 2022-03-21 Rabah Abdul Khalek

The CMS measurement of dijet pseudorapidity distributions in pPb versus pp collisions at 5.02 TeV provides a direct probe on nuclear gluon PDFs. We show that while the predicted pPb pseudorapidity distributions suffer from sizable…

High Energy Physics - Phenomenology · Physics 2018-12-14 Kari J. Eskola , Petja Paakkinen , Hannu Paukkunen

The pseudorapidity distributions of dijets as a function of their average transverse momentum ($p_\mathrm{T}^\text{ave}$) are measured in proton-lead (pPb) and proton-proton (pp) collisions. The data samples were collected by the CMS…

High Energy Physics - Experiment · Physics 2018-08-15 CMS Collaboration

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 dijet (CMS) and $D^0$-meson (LHCb) nuclear modification…

High Energy Physics - Phenomenology · Physics 2021-02-03 Kari J. Eskola , Ilkka Helenius , Petja Paakkinen , Hannu Paukkunen

We compute the cross section of inclusive dijet photoproduction in ultraperipheral Pb-Pb collisions at the LHC using next-to-leading order perturbative QCD. We demonstrate that our theoretical calculations provide a good description of…

High Energy Physics - Phenomenology · Physics 2019-07-08 V. Guzey , M. Klasen

In this talk we apply the photoproduction framework recently implemented into the Pythia 8 Monte Carlo event generator to study the potential of photo-nuclear dijets in ultra-peripheral Pb+Pb collisions at the LHC to further constrain the…

High Energy Physics - Phenomenology · Physics 2018-12-03 Ilkka Helenius

Dijet production in proton-nucleus ($p$A) collisions at the LHC provides invaluable information on the underlying parton distributions in nuclei, especially the gluon distributions. Triple-differential dijet cross sections enable a…

High Energy Physics - Phenomenology · Physics 2022-06-08 Shuwan Shen , Peng Ru , Ben-Wei Zhang

We update our previous studies of nuclear-matter effects on J/Psi production in proton-nucleus for the recent LHC pPb runs at sqrt(s_NN)=5 TeV. We have analysed the effects of the modification of the gluon PDFs in nucleus, using an exact…

High Energy Physics - Phenomenology · Physics 2013-10-14 E. G. Ferreiro , F. Fleuret , J. P. Lansberg , A. Rakotozafindrabe

We discuss the implications of the preliminary CMS dijet data from 5.02 TeV pp and pPb collisions for gluon PDFs of the proton and nuclei. The preliminary pp data show a discrepancy with NLO predictions using for example the CT14 PDFs. We…

High Energy Physics - Phenomenology · Physics 2018-06-22 Kari J. Eskola , Petja Paakkinen , Hannu Paukkunen

We present our results on open beauty production in proton-nucleus collisions for the recent LHC $p$Pb run at $\sqrt{s_{NN}}$=5 TeV. We have analysed the effect of the modification of the gluon PDFs in nucleus at the level of the nuclear…

High Energy Physics - Phenomenology · Physics 2014-09-03 Z. Conesa del Valle , E. G. Ferreiro , F. Fleuret , J. P. Lansberg , A. Rakotozafindrabe

We scrutinize the recent LHCb data for D$^0$-meson production in p+Pb collisions within a next-to-leading order QCD framework. Our calculations are performed in the SACOT-$m_{\rm T}$ variant of the general-mass variable-flavour-number…

High Energy Physics - Phenomenology · Physics 2020-06-24 Kari J. Eskola , Ilkka Helenius , Petja Paakkinen , Hannu Paukkunen

We discuss the recent CMS Collaboration measurement of $W^\pm$ boson production in p+Pb collisions at 8.16 TeV in terms of the constraining power on nuclear parton distribution functions (PDFs). The impact of the free-proton PDF…

High Energy Physics - Phenomenology · Physics 2022-04-13 Kari J. Eskola , Petja Paakkinen , Hannu Paukkunen , Carlos A. Salgado

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 previous fit, EPPS16, the present analysis includes more data…

High Energy Physics - Phenomenology · Physics 2022-05-25 Kari J. Eskola , Petja Paakkinen , Hannu Paukkunen , Carlos A. Salgado

We present results of our recent EPPS16 global analysis of NLO nuclear parton distribution functions (nPDFs). For the first time, dijet and heavy gauge boson production data from LHC proton-lead collisions have been included in a global…

High Energy Physics - Phenomenology · Physics 2017-10-17 Kari J. Eskola , Petja Paakkinen , Hannu Paukkunen , Carlos A. Salgado

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 perturbative QCD predictions. With reasonable experimental cuts…

High Energy Physics - Phenomenology · Physics 2022-03-02 Petja Paakkinen

Inclusive direct photon production in p+Pb collisions at the LHC is studied within the NLO perturbative QCD. Our aim is to quantify the dominant $x$ regions probed at different rapidities and to identify the best conditions for testing the…

High Energy Physics - Phenomenology · Physics 2015-06-19 Ilkka Helenius , Kari J. Eskola , Hannu Paukkunen

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 of both the photon-emitting and the target nucleus, estimated…

High Energy Physics - Phenomenology · Physics 2024-05-07 Kari J. Eskola , Vadim Guzey , Ilkka Helenius , Petja Paakkinen , Hannu Paukkunen

We present a systematic investigation of jet production at hadron colliders from a phenomenological point of view, with the dual aim of providing a validation of theoretical calculations and guidance to future determinations of parton…

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