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The Lorentz contraction of ultrarelativistic nuclei entails a spatial overlap and fusion (recombination, saturation) of partons belonging to different nucleons at the same impact parameter. In these lectures we present a consistent…

High Energy Physics - Phenomenology · Physics 2007-05-23 I. P. Ivanov , N. N. Nikolaev , W. Schäfer , B. G. Zakharov , V. R. Zoller

We formulate the perturbative QCD approach to coherent diffractive dijet production in pion-nucleon and pion-nucleus collisions at high energy. For hard dijets the Pomeron splitting mechanism in which both helicity amplitudes are…

High Energy Physics - Phenomenology · Physics 2009-08-25 N. N. Nikolaev , W. Schäfer , G. Schwiete

We argue that semi-inclusive photo-production of a pair of hard jets via coherent diffraction in nucleus-nucleus ultra-peripheral collisions at high energy is a golden channel to study gluon saturation. The dominant contribution is the…

High Energy Physics - Phenomenology · Physics 2023-04-26 E. Iancu , A. H. Mueller , D. N. Triantafyllopoulos , S. Y. Wei

We review the description of high energy diffraction from both the s and t channel viewpoints, and demonstrate their consistency. We emphasize the role played by s channel unitarity and multi-Pomeron exchanges. We explain how these effects…

High Energy Physics - Phenomenology · Physics 2014-11-17 A. B. Kaidalov , V. A. Khoze , A. D. Martin , M. G. Ryskin

The determination of the parton distribution functions (PDFs) is crucial for a complete understanding of the protons and neutrons that make most of the visible matter in the universe. Years of dedicated studies have yielded a quite precise…

High Energy Physics - Phenomenology · Physics 2018-10-02 Pia Zurita

We derive the two-plateau momentum distribution of final state (FS) quarks produced in deep inelastic scattering (DIS) off nuclei in the saturation regime. The diffractive plateau which dominates for small transverse momentum p measures…

High Energy Physics - Phenomenology · Physics 2009-11-07 N. N. Nikolaev , W. Schäfer , B. G. Zakharov , V. R. Zoller

We compute cross sections for incoherent diffractive J/Psi production in lepton-nucleus deep inelastic scattering. The cross section is proportional to A in the dilute limit and to A^(1/3) in the black disc limit, with a large nuclear…

High Energy Physics - Phenomenology · Physics 2015-03-17 T. Lappi , H. Mäntysaari

Neutrino Deep Inelastic Scattering on nuclei is an essential process to constrain the strange quark parton distribution functions in the proton. The critical component on the way to using the neutrino DIS data in a proton PDF analysis is…

High Energy Physics - Phenomenology · Physics 2011-07-18 K. Kovarik

The effect of multiple scatterings on the propagation of hard partonic jets in a dense nuclear medium is studied in the framework of deep-inelastic scattering (DIS) off a large nucleus. Power counting arguments based on the Glauber improved…

High Energy Physics - Phenomenology · Physics 2015-06-05 Guang-You Qin , Abhijit Majumder

Parton distributions given by deep inelastic lepton scattering (DIS) are not equal to the probabilities of finding those partons in the parent wave function. Soft rescattering of the struck parton within the coherence length of the hard…

High Energy Physics - Phenomenology · Physics 2009-11-07 Paul Hoyer

We review a consistent description of the fusion and saturation of partons in the Lorentz-contracted ultrarelativistic nuclei in terms of a nuclear attenuation of color dipole states of the photon and collective Weizs\"acker-Williams (WW)…

High Energy Physics - Phenomenology · Physics 2017-08-23 I. P. Ivanov , N. N. Nikolaev , W. Schäfer , B. G. Zakharov , V. R. Zoller

We calculate the cross section for diffractive hadron production in deep inelastic scattering off heavy nuclei in the framework of gluon saturation/color glass condensate. We analyze the kinematic region of the future Electron-Ion Collider.…

High Energy Physics - Phenomenology · Physics 2015-03-17 Kirill Tuchin , Dajing Wu

We review the recent finding of the two-plateau momentum distribution of sea quarks in deep inelastic scattering off nuclei in the saturation regime. The diffractive plateau which dominates for small $\bp$ measures precisely the momentum…

High Energy Physics - Phenomenology · Physics 2009-11-07 I. P. Ivanov , N. N. Nikolaev , W. Schäfer , B. G. Zakharov , V. R. Zoller

We use the Glauber-Gribov multiple scattering formalism and the theory of leading twist nuclear shadowing to develop a method for the calculation of leading twist hard coherent diffraction in hadron-nucleus processes. We demonstrate that…

High Energy Physics - Phenomenology · Physics 2008-11-26 V. Guzey , M. Strikman

We study incoherent diffractive production of two and three jets in electron-nucleus deep inelastic scattering (DIS) at small $x_{\scriptscriptstyle \rm Bj}$ using the color dipole picture and the effective theory of the Color Glass…

High Energy Physics - Phenomenology · Physics 2024-07-26 Benjamin Rodriguez-Aguilar , D. N. Triantafyllopoulos , S. Y. Wei

Diffraction is an old subject which has received much interest in recent years due to the advent of diffractive hard scattering. We discuss some theoretical models and experimental results that have shown new striking effects, e.g. rapidity…

High Energy Physics - Phenomenology · Physics 2007-05-23 Gunnar Ingelman

Semi-inclusive deep inelastic scattering off nuclei is a unique process to study the parton propagation mechanism and its modification induced by the presence of the nuclear medium. It allows us to probe the medium properties, particularly…

High Energy Physics - Phenomenology · Physics 2024-09-20 Raphaël Dupré , Federico Ceccopieri

We study incoherent diffractive dijet production in electron-nucleus deep inelastic scattering at small $x_{\rm \scriptscriptstyle Bj}$ within the Color Glass Condensate. We follow the general approach of [1] but we focus on the correlation…

High Energy Physics - Phenomenology · Physics 2023-06-21 Benjamin Rodriguez-Aguilar , D. N. Triantafyllopoulos , S. Y. Wei

Hard processes in diffractive deep-inelastic scattering can be described by a factorisation into parton-level subprocesses and diffractive parton distributions. In this framework, cross sections for inclusive dijet production in diffractive…

High Energy Physics - Phenomenology · Physics 2018-08-01 D. Britzger , J. Currie , T. Gehrmann , A. Huss , J. Niehues , R. Žlebčík

Inclusive jet cross sections for events with a large rapidity gap with respect to the proton direction from the reaction $ep \rightarrow jet \; + \; X$ with quasi-real photons have been measured with the ZEUS detector. The cross sections…

High Energy Physics - Experiment · Physics 2012-08-27 ZEUS Collaboration
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