A perturbative QCD study of dijets in p+Pb collisions at the LHC

Eskola, Kari J.; Paukkunen, Hannu; Salgado, Carlos A.

doi:10.1007/jhep10(2013)213

Cited by 30 publications

(21 citation statements)

References 90 publications

(86 reference statements)

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“…In our calculations, this follows essentially from antishadowed gluons becoming divided by EMC-suppressed gluon distributions, see Ref. [67] for more detailed discussions. The PHENIX pion data [28] is also well consistent with EPPS16 though, for the more precise CMS dijet data, its role is no longer as essential as it was in the EPS09 analysis.…”

Section: Comparison With Datamentioning

confidence: 99%

EPPS16: nuclear parton distributions with LHC data

Eskola¹,

Paakkinen²,

Paukkunen³

et al. 2017

Eur. Phys. J. C

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586

737

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We introduce a global analysis of collinearly factorized nuclear parton distribution functions (PDFs) including, for the first time, data constraints from LHC proton–lead collisions. In comparison to our previous analysis, EPS09, where data only from charged-lepton–nucleus deep inelastic scattering (DIS), Drell–Yan (DY) dilepton production in proton–nucleus collisions and inclusive pion production in deuteron–nucleus collisions were the input, we now increase the variety of data constraints to cover also neutrino–nucleus DIS and low-mass DY production in pion–nucleus collisions. The new LHC data significantly extend the kinematic reach of the data constraints. We now allow much more freedom for the flavor dependence of nuclear effects than in other currently available analyses. As a result, especially the uncertainty estimates are more objective flavor by flavor. The neutrino DIS plays a pivotal role in obtaining a mutually consistent behavior for both up and down valence quarks, and the LHC dijet data clearly constrain gluons at large momentum fraction. Mainly for insufficient statistics, the pion–nucleus DY and heavy-gauge-boson production in proton–lead collisions impose less visible constraints. The outcome – a new set of next-to-leading order nuclear PDFs called EPPS16 – is made available for applications in high-energy nuclear collisions.

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Section: Comparison With Datamentioning

confidence: 99%

EPPS16: nuclear parton distributions with LHC data

Eskola¹,

Paakkinen²,

Paukkunen³

et al. 2017

Eur. Phys. J. C

Self Cite

586

737

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show abstract

“…This also means that the jets can be fairly fat and thus contributions of multi-parton interactions are potentially significant. Using inclusive jets as a probe for small-x structure of heavy ions is in contrast to the usual paradigm of using jets to probe the large-x parton content of nuclei [60,61].…”

Section: Introductionmentioning

confidence: 99%

Saturation and forward jets in proton-lead collisions at the LHC

Mäntysaari

Paukkunen

2019

Phys. Rev. D

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We investigate the forward-jet energy spectrum within the Color Glass Condensate framework at 5 TeV center-of-mass energy. In particular, we focus on the kinematic range covered by the CMS-CASTOR calorimeter. We show that our saturation-model calculations are compatible with the CASTOR measurements and that to optimally reproduce the data, effects of multi-parton interactions need to be included. We predict a significant nuclear suppression -reaching down to 50% at the lowest considered jet energies Ejet ∼ 500 GeV.

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“…In the near future, the most promising source for new nPDF constraints are the hard processes in p+Pb collisions at the LHC [20][21][22][23][24][25][26][27][28]. With the naive leading order (LO) 2 → 2 kinematics one can estimate the nuclear-side x (that is, x 2 ) from…”

Section: Introductionmentioning

confidence: 99%

Probing the small-x nuclear gluon distributions with isolated photons at forward rapidities in p+Pb collisions at the LHC

Helenius

Eskola

Paukkunen

2014

J. High Energ. Phys.

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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 nuclear gluon parton distribution functions (nPDFs) at small x. A comparison to the inclusive pion production reveals that from these two processes the photons carry more sensitivity to the small-x partons and that this sensitivity can be further increased by imposing an isolation cut for the photon events. The details of the isolation criteria, however, seem to make only a small difference to the studied x sensitivity and have practically no effect on the expected nuclear modifications. We consider also the yield asymmetry between forward and backward rapidities which can be used to probe the nPDFs irrespectively of whether an accurate p+p baseline is available.

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A perturbative QCD study of dijets in p+Pb collisions at the LHC

Cited by 30 publications

References 90 publications

EPPS16: nuclear parton distributions with LHC data

EPPS16: nuclear parton distributions with LHC data

Saturation and forward jets in proton-lead collisions at the LHC

Probing the small-x nuclear gluon distributions with isolated photons at forward rapidities in p+Pb collisions at the LHC

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