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We propose a new experimental method to probe the photon parton distribution function inside the proton (photon PDF) at LHC energies. The method is based on the measurement of dilepton production from the $\gamma p\rightarrow\ell^+\ell^-+X$…

High Energy Physics - Phenomenology · Physics 2019-06-19 Mateusz Dyndal , Alexander Glazov , Marta Luszczak , Renat Sadykov

We investigate the potential of inclusive-jet production in deep-inelastic scattering (DIS) at a future Electron-Ion Collider (EIC) to improve our current knowledge of nuclear parton density functions (PDFs). We demonstrate that the…

High Energy Physics - Phenomenology · Physics 2017-05-31 M. Klasen , K. Kovarik , J. Potthoff

The future Electron-Ion Collider (EIC) will explore several fundamental questions in a broad Bjorken-x ($x_{BJ}$) and $Q^{2}$ phase space. Heavy flavor and jet products are ideal probes to precisely study the tomography of nucleon/nuclei…

We investigate the substructure of jets produced in photoproduction events with center-of-mass energies $\sqrt{s} = 30\text{--}140$ GeV at the proposed Electron-Ion Collider (EIC). Events are generated using PYTHIA and contributions from…

High Energy Physics - Experiment · Physics 2026-03-11 Siddharth Narayan Singh , Ritu Aggarwal , Manjit Kaur

The future Electron-Ion Collider (EIC) will utilize a series of high-luminosity high-energy electron+proton ($e+p$) and electron+nucleus ($e+A$) collisions to explore the inner structure of nucleon and nucleus and the matter formation…

In this paper, we propose to test quantum entanglement and Bell nonlocality at an Electron-Ion Collider (EIC). By computing the spin correlations in quark-antiquark pairs produced via photon-gluon fusion, we find that longitudinally…

High Energy Physics - Phenomenology · Physics 2026-03-17 Wei Qi , Zijing Guo , Bo-Wen Xiao

It is demonstrated that measurements of the spin asymmetry for di-jet production at future polarized colliders appear to be particularly suited for a first determination of the so far unmeasured parton densities of circularly polarized…

High Energy Physics - Phenomenology · Physics 2007-05-23 M. Stratmann

In this thesis the polarized and unpolarized photon distributions of the nucleon (proton, neutron) $(\Delta)\gamma^N$, evaluated in the equivalent photon approximation (EPA), are computed theoretically and the possibility of their…

High Energy Physics - Phenomenology · Physics 2007-05-23 Cristian Pisano

We study the exclusive electroproduction process $e+p\to e'+p'+X$, with $X$ a single-particle final state, in the forward-proton kinematics relevant for the future Electron-Ion Collider (EIC). We develop a unified $2\to 3$ framework that…

High Energy Physics - Phenomenology · Physics 2026-04-13 Reuven Balkin , Ta'el Coren , Alexander Jentsch , Hongkai Liu , Maksym Ovchynnikov , Yotam Soreq , Sokratis Trifinopoulos

An empirical fit is described to measurements of inclusive inelastic electron-proton cross sections in the kinematic range of four-momentum transfer $0 \le Q^2<8$ GeV$^2$ and final state invariant mass $1.1<W<3.1$ GeV. The fit is…

High Energy Physics - Phenomenology · Physics 2014-11-18 M. E. Christy , P. B. Bosted

This article gives an overview of recent highlights from experimental measurements of heavy-ion collisions at ultra-relativistic energies: Measurements of electroweak probes constrain both the initial collision geometry and the nuclear…

Nuclear Experiment · Physics 2020-12-17 Yvonne Pachmayer

Generalized distribution amplitudes (GDAs) offer valuable insights into the three-dimensional structure of hadrons, delineating the amplitudes associated with the transition from a quark-antiquark pair to a hadron pair. Currently, hadron…

High Energy Physics - Phenomenology · Physics 2025-01-03 Bing'ang Guo , Jing Han , Ya-Ping Xie , Xurong Chen

A measurement of prompt photon-pair production in proton-proton collisions at $\sqrt{s}=13$ TeV is presented. The data were recorded by the ATLAS detector at the LHC with an integrated luminosity of 139 fb$^{-1}$. Events with two photons in…

High Energy Physics - Experiment · Physics 2021-12-08 ATLAS Collaboration

The Electron-ion collider in China (EicC) is a proposed future electron-ion collider designed to achieve a high luminosity, with a center-of-mass energy ranging from 15 to 20 GeV. Excellent particle identification (PID) with extensive…

Instrumentation and Detectors · Physics 2026-05-25 Xin Li , Yuxiang Zhao , Yutie Liang , Xu Sun

The Electron-Ion Collider (EIC) will be the next frontier project of nuclear physics in the United States. It is planned to be built in the Brookhaven National Laboratory (BNL) in close collaboration with Jefferson Lab. One of the key…

Instrumentation and Detectors · Physics 2022-02-15 Greg Kalicy

We compute the differential cross-section for inclusive prompt photon$+$quark production in deeply inelastic scattering of electrons off nuclei at small $x$ ($e+A$ DIS) in the framework of the Color Glass Condensate effective field theory.…

High Energy Physics - Phenomenology · Physics 2021-01-18 Isobel Kolbé , Kaushik Roy , Farid Salazar , Bjoern Schenke , Raju Venugopalan

We argue that existing measurements of ep collisions at HERA --in which an energetic photon is made via a QED `Compton' subprocess-- can provide rather detailed information on the photonic parton density of the proton. This function and its…

High Energy Physics - Phenomenology · Physics 2009-10-31 A. De Rujula , W. Vogelsang

Higgs boson production in partonic and electromagnetic (photon-photon) interactions of light- and heavy-ions (A-A) at the LHC and future colliders is summarized. Parton-induced cross sections --including gluon-gluon, vector-boson fusion,…

High Energy Physics - Experiment · Physics 2019-06-19 David d'Enterria

Measuring the pionic structure function is of high interests as it provides a new area for understanding the strong interaction among quarks and testing the QCD predictions. To this purpose, we investigate the feasibility and the expected…

High Energy Physics - Phenomenology · Physics 2021-04-20 Gang Xie , Mengyang Li , Chengdong Han , Rong Wang , Xurong Chen

One of the challenges of collider physics is to unambiguously associate detector based objects with the corresponding elementary physics objects. A particular example is the association of calorimeter-based objects such as "jets",…

High Energy Physics - Phenomenology · Physics 2013-05-30 Stephen D. Ellis , Tuhin S. Roy , Jakub Scholtz