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The parton distribution functions (PDFs) of the proton are one of the essential ingredients to describe physics processes at hadron colliders. The Z boson production data at the LHC have a potential to constrain PDFs, especially the gluon…

High Energy Physics - Phenomenology · Physics 2016-08-31 Rajdeep M Chatterjee , Monoranjan Guchait , Ringaile Placakyte

The central exclusive production of charged hadron pairs in pp collisions at a centre-of-mass energy of 13 TeV is examined, based on data collected in a special high-$\beta^*$ run of the LHC. Events are selected by requiring both scattered…

High Energy Physics - Experiment · Physics 2024-01-15 Ferenc Siklér

We discuss production of far-forward $D$ mesons/antimesons and neutrinos/antineutrinos from their semileptonic decays in pp-collisions at the LHC. We include the gluon-gluon fusion $gg \to c\bar{c}$, the intrinsic charm (IC) $gc \to gc$ as…

High Energy Physics - Phenomenology · Physics 2023-02-15 Rafal Maciula , Antoni Szczurek

We present the first study of rapidity-differential cross sections of coherent exclusive $J/\psi$ photoproduction in heavy-ion ultraperipheral collisions (UPCs) at the LHC, $\text{d}\sigma(\text{Pb}+\text{Pb}\rightarrow…

High Energy Physics - Phenomenology · Physics 2022-08-16 Kari J. Eskola , Chris A. Flett , Vadim Guzey , Topi Löytäinen , Hannu Paukkunen

The impact of isolated-photon data from proton-(anti)proton collisions at RHIC, SppbarS, Tevatron and LHC energies, on the parton distribution functions of the proton is studied using a recently developed Bayesian reweighting method. The…

High Energy Physics - Phenomenology · Physics 2012-03-23 David d'Enterria , Juan Rojo

Recent measurements of the inclusive top pair production at the Tevatron and LHC collider in the electron/muon final states are discussed. Measurements at the Tevatron use up to 9.7 /fb of data, and at the LHC up to 4.9 /fb of data at…

High Energy Physics - Experiment · Physics 2013-12-24 Andreas Werner Jung

We show that the production of J/psi or Upsilon pairs in unpolarised pp collisions is currently the best process to measure the momentum-distribution of linearly-polarised gluons inside unpolarised protons through the study of azimuthal…

High Energy Physics - Phenomenology · Physics 2019-01-30 Jean-Philippe Lansberg , Cristian Pisano , Florent Scarpa , Marc Schlegel

We study the unintegrated, or transverse momentum dependent (TMD) gluon distribution obtained from the best description of the LHC data on the inclusive spectra of hadrons produced in the mid-rapidity region and low transverse momenta at…

High Energy Physics - Phenomenology · Physics 2014-01-15 A. V. Lipatov , G. I. Lykasov , N. P. Zotov

Over the past years the LHC experiments have reported experimental evidences for processes associated to photon-photon and photon-hadron interactions, showing their potential to investigate the production of low- and high-mass systems in…

High Energy Physics - Phenomenology · Physics 2016-10-03 G. Gil da Silveira , V. P. Goncalves , M. M. Jaime

We present the first NLO pQCD study of coherent exclusive $J/\psi$ photoproduction in ultraperipheral heavy-ion collisions (UPCs) at the LHC. Taking the generalized parton distributions (GPDs) in their forward limit, as parton distribution…

High Energy Physics - Phenomenology · Physics 2022-09-20 K. J. Eskola , C. A. Flett , V. Guzey , T. Löytäinen , H. Paukkunen

The quantum statistical parton distributions approach proposed more than one decade ago is revisited by considering a larger set of recent and accurate Deep Inelastic Scattering experimental results. It enables us to improve the description…

High Energy Physics - Phenomenology · Physics 2015-12-09 Claude Bourrely , Jacques Soffer

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

In this letter we complement previous studies on exclusive vector meson photoproduction in hadronic collisions presenting a comprehensive analysis of the $t$ - spectrum measured in exclusive $\rho$ and $J/\Psi$ photoproduction in $pA$…

High Energy Physics - Phenomenology · Physics 2019-03-13 V. P. Goncalves , F. S. Navarra , D. Spiering

We estimate the value of the survival probability for central exclusive production, in a model, which is based on the CGC/saturation approach. Hard and soft processes are described in the same framework. At LHC energies, we obtain a small…

High Energy Physics - Phenomenology · Physics 2016-05-04 E. Gotsman , E. Levin , U. Maor

We found the parameterization of the unintegrated gluon distribution from the best description of the LHC data on the inclusive spectra of hadrons produced in $pp$ collisions at the mid-rapidity region and small transverse momenta. It is…

High Energy Physics - Phenomenology · Physics 2012-03-06 A. A. Grinyuk , H. Jung , G. I. Lykasov , A. V. Lipatov , N. P. Zotov

We discuss exclusive elastic double diffractive axial-vector $\chi_c(1^+)$ and tensor $\chi_c(2^+)$ mesons production for different meson polarisations in proton-(anti)proton collisions at the Tevatron energy. The amplitude for the process…

High Energy Physics - Phenomenology · Physics 2011-04-28 Roman Pasechnik , Antoni Szczurek , Oleg Teryaev

We present the study of accessing unpolarized and linearly polarized gluon TMDs in J/{\psi} and {\Upsilon}(1S) production in unpolarized proton-proton collision at LHC, RHIC and AFTER energies. Non- relativistic QCD based color octet model…

High Energy Physics - Phenomenology · Physics 2017-01-03 Asmita Mukherjee , Sangem Rajesh

The quantum statistical parton distributions approach proposed more than one decade ago is revisited by considering a larger set of recent and accurate Deep Inelastic Scattering experimental results. It enables us to improve the description…

High Energy Physics - Phenomenology · Physics 2017-04-05 Jacques Soffer , Claude Bourrely

We study the exclusive production of heavy flavors at central rapidities in hadron-hadron collisions within the kT factorisation formalism. Since this involves regions of small Bjorken x in the unintegrated gluon densities, we include the…

High Energy Physics - Phenomenology · Physics 2009-11-16 G. Chachamis , M. Hentschinski , A. Sabio Vera , C. Salas

Motivated by hints for a light Standard Model-like Higgs boson and a shift in experimental attention towards electroweak supersymmetry particle production at the CERN LHC, we update in this paper our precision predictions at next-to-leading…

High Energy Physics - Phenomenology · Physics 2013-10-11 Benjamin Fuks , Michael Klasen , David R. Lamprea , Marcel Rothering