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We study open heavy flavor meson production in proton-nucleus (pA) collisions at RHIC and LHC energies within the Color Glass Condensate framework. We use the unintegrated gluon distribution at small Bjorken's x in the proton obtained by…

High Energy Physics - Phenomenology · Physics 2015-06-16 Hirotsugu Fujii , Kazuhiro Watanabe

Experimental results obtained with the HERA collider and recent progress in their theoretical interpretation are reviewed. After a short introduction to HERA physics, deep inelastic scattering and photoproduction are discussed as (virtual)…

Astrophysics · Physics 2009-09-25 Ralph Engel

The information on the gluonic structure and its fluctuations is captured by the differential $|t|$ spectrum in diffractive events. The incoherent cross-section is sensitive to the fluctuations in the target wavefunction in such events. We…

High Energy Physics - Phenomenology · Physics 2022-07-28 Arjun Kumar

A model-independent search for deviations from the Standard Model prediction is performed in e-p collisions at HERA II using H1 data recorded during the years 2005 and 2006, corresponding to an integrated luminosity of 159 inv.pb. All event…

High Energy Physics - Experiment · Physics 2007-05-28 Martin Wessels

Large angle gluon radiations induced by multiple parton scatterings contribute to dijet production in deeply inelastic scattering off a large nucleus at the Electron-Ion Collider. Within the generalized high-twist approach to multiple…

High Energy Physics - Phenomenology · Physics 2022-03-22 Yuan-Yuan Zhang , Xin-Nian Wang

Forward two-particle angular correlations in $pA$ collisions have long been recognized as a particularly sensitive observable for exploring gluon saturation effects. In the back-to-back regime, two-particle correlations receive substantial…

High Energy Physics - Phenomenology · Physics 2026-05-05 Zhan Gao , Cyrille Marquet , Yu Shi , Bo-Wen Xiao

We investigate the energy dependence of the photo-production cross-section of vector mesons $J/\Psi$ and $\Upsilon$, measured by both HERA experiments H1 and ZEUS in electron-proton collisions and by LHC experiments ALICE, CMS and LHCb in…

High Energy Physics - Phenomenology · Physics 2019-08-12 Martin Hentschinski , Krzysztof Kutak

We demonstrate that hard dijet production via coherent inelastic diffraction is a promising channel for probing gluon saturation at the Electron-Ion Collider. By $inelastic$ diffraction we mean a process in which the two hard jets - a…

High Energy Physics - Phenomenology · Physics 2022-06-01 E. Iancu , A. H. Mueller , D. N. Triantafyllopoulos

We present a Monte-Carlo simulation of energy deposition process in relativistic heavy-ion collisions based on a new realization of the Interacting-Gluon-Model (IGM) for high energy $N-N$ collisions. In particular we show results for proton…

High Energy Physics - Phenomenology · Physics 2015-06-25 Q. J. Liu , W. Q. Chao , G. Wilk

We derive the semiclassical (instanton-induced) contribution to the inelastic cross section of two color dipoles at large $\sqrt{s}$. We study its dependence on the dipole sizes, orientations and, most importantly, the impact parameter. The…

High Energy Physics - Phenomenology · Physics 2009-11-10 Edward V. Shuryak , Ismail Zahed

Data on the hadronic final state of deep-inelastic events at the ep collider HERA are reviewed. Fragmentation properties in the current region extracted from charged particle spectra are compared to e+e- and fixed target experiments at…

High Energy Physics - Phenomenology · Physics 2007-05-23 Tancredi Carli

We analyse, within a dipole model, the inclusive DIS cross section data, obtained from the combination of the H1 and ZEUS HERA measurements. We show that these high precision data are very well described within the dipole model framework,…

High Energy Physics - Phenomenology · Physics 2019-11-20 Agnieszka Luszczak , Henri Kowalski

The strikingly different high energy behaviours of real photoabsorption cross-sections with Q^2 = 0 and the low x proton structure function at large Q^2 are studied from a laboratory frame viewpoint, in which the x and Q^2 dependence…

High Energy Physics - Phenomenology · Physics 2009-10-30 G. Kerley , G. Shaw

We review basic ideas related to saturation of parton densities at small value of the Bjorken variable x. A special emphasis is put on interpreting the results from the ep deep inelastic scattering experiments at HERA.

High Energy Physics - Phenomenology · Physics 2014-11-17 K. Golec-Biernat

We systematically compare an event-by-event heavy-ion collision model to data from the Large Hadron Collider. Using a general Bayesian method, we probe multiple model parameters including fundamental quark-gluon plasma properties such as…

We study single inclusive hadron production in proton-proton and proton-nucleus collisions in the CGC framework. The parameters in the calculation are determined solely by standard nuclear geometry and by electron-proton deep inelastic…

High Energy Physics - Phenomenology · Physics 2013-12-16 T. Lappi , H. Mäntysaari

Inclusive event shape variables have been measured in the Breit Frame for neutral current deep-inelastic positron-proton scattering using the H1 and ZEUS detectors at HERA. The variables thrust, jet broadening, C-parameter, jet mass and two…

High Energy Physics - Experiment · Physics 2007-05-23 G. J. McCance

We study saturation effects in the production of forward dijets in proton-lead collisions at the Large Hadron Collider, using the framework of High Energy Factorization. Such configurations, with both jets produced in the forward direction,…

High Energy Physics - Phenomenology · Physics 2014-06-19 A. van Hameren , P. Kotko , K. Kutak , C. Marquet , S. Sapeta

The coherent production of vector mesons in photon - hadron interactions is considered one of the most promising observables to probe the QCD dynamics at high energies and the transverse spatial distribution of the gluons in the hadron wave…

High Energy Physics - Phenomenology · Physics 2024-09-04 Victor P. Goncalves , Bruno D. Moreira , Luana Santana

We present a model based on the concept of saturation for small $Q^2$ and small $x$. With only three parameters we achieve a good description of all Deep Inelastic Scattering data below $x=0.01$. This includes a consistent treatment of…

High Energy Physics - Phenomenology · Physics 2010-05-12 K. Golec-Biernat , M. Wusthoff