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ePIC Early Science Report
Authors:
D. Abbott,
N. Abdelrahman,
S. Abhijit,
I. Abualrob,
R. B. Achari,
J. Adam,
L. Adamczyk,
K. Adkins,
A. Affolder,
K. Agarwal,
J. Agarwala,
N. Agrawal,
C. A. Aidala,
W. Akers,
A. Al-bataineh,
S. N. Alam,
M. Alekseev,
P. R. Altieri,
J. -S. Alvarado Gallenao,
S. B. L. Amar,
R. Ammendola,
I. Amos Cali,
G. An,
D. Anderson,
E. Anderssen
, et al. (774 additional authors not shown)
Abstract:
This Early Science Report from the ePIC Collaboration outlines the compelling physics program achievable during the first years of operation of the Electron-Ion Collider (EIC), prior to the establishment of the full design luminosity and energy range. The analyses are based on realistic early-running beam configurations and detailed Geant4 ePIC detector simulations, hit digitization and data recon…
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This Early Science Report from the ePIC Collaboration outlines the compelling physics program achievable during the first years of operation of the Electron-Ion Collider (EIC), prior to the establishment of the full design luminosity and energy range. The analyses are based on realistic early-running beam configurations and detailed Geant4 ePIC detector simulations, hit digitization and data reconstruction. The projected studies from the physics working groups of ePIC span inclusive, semi-inclusive, exclusive, diffractive and tagging, as well as jet and heavy flavor measurements in both electron-proton and electron-ion collisions. Even before the collider reaches its full design performance, these measurements will constrain parton distribution functions in nucleons and nuclei, access transverse-momentum-dependent and spin-dependent observables, probe gluon dynamics in nuclei, and initiate a program of imaging of quarks and gluons. Each measurement is directly connected to the core science pillars of the EIC, identified in the 2018 report by the National Academy of Sciences: understanding the origin of the nucleon mass, unraveling the spin structure of the nucleon, and exploring the emergent properties of dense gluonic matter. The results presented here provide examples that demonstrate that the early years of EIC running with ePIC will deliver novel world-leading insights into Quantum Chromodynamics. In addition, the early science program will establish measurement and analysis methodologies that will pave the way to the subsequent full EIC physics program.
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Submitted 5 August, 2026;
originally announced August 2026.
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ATHENA Detector Proposal -- A Totally Hermetic Electron Nucleus Apparatus proposed for IP6 at the Electron-Ion Collider
Authors:
ATHENA Collaboration,
J. Adam,
L. Adamczyk,
N. Agrawal,
C. Aidala,
W. Akers,
M. Alekseev,
M. M. Allen,
F. Ameli,
A. Angerami,
P. Antonioli,
N. J. Apadula,
A. Aprahamian,
W. Armstrong,
M. Arratia,
J. R. Arrington,
A. Asaturyan,
E. C. Aschenauer,
K. Augsten,
S. Aune,
K. Bailey,
C. Baldanza,
M. Bansal,
F. Barbosa,
L. Barion
, et al. (415 additional authors not shown)
Abstract:
ATHENA has been designed as a general purpose detector capable of delivering the full scientific scope of the Electron-Ion Collider. Careful technology choices provide fine tracking and momentum resolution, high performance electromagnetic and hadronic calorimetry, hadron identification over a wide kinematic range, and near-complete hermeticity. This article describes the detector design and its e…
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ATHENA has been designed as a general purpose detector capable of delivering the full scientific scope of the Electron-Ion Collider. Careful technology choices provide fine tracking and momentum resolution, high performance electromagnetic and hadronic calorimetry, hadron identification over a wide kinematic range, and near-complete hermeticity. This article describes the detector design and its expected performance in the most relevant physics channels. It includes an evaluation of detector technology choices, the technical challenges to realizing the detector and the R&D required to meet those challenges.
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Submitted 13 October, 2022;
originally announced October 2022.
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Science Requirements and Detector Concepts for the Electron-Ion Collider: EIC Yellow Report
Authors:
R. Abdul Khalek,
A. Accardi,
J. Adam,
D. Adamiak,
W. Akers,
M. Albaladejo,
A. Al-bataineh,
M. G. Alexeev,
F. Ameli,
P. Antonioli,
N. Armesto,
W. R. Armstrong,
M. Arratia,
J. Arrington,
A. Asaturyan,
M. Asai,
E. C. Aschenauer,
S. Aune,
H. Avagyan,
C. Ayerbe Gayoso,
B. Azmoun,
A. Bacchetta,
M. D. Baker,
F. Barbosa,
L. Barion
, et al. (390 additional authors not shown)
Abstract:
This report describes the physics case, the resulting detector requirements, and the evolving detector concepts for the experimental program at the Electron-Ion Collider (EIC). The EIC will be a powerful new high-luminosity facility in the United States with the capability to collide high-energy electron beams with high-energy proton and ion beams, providing access to those regions in the nucleon…
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This report describes the physics case, the resulting detector requirements, and the evolving detector concepts for the experimental program at the Electron-Ion Collider (EIC). The EIC will be a powerful new high-luminosity facility in the United States with the capability to collide high-energy electron beams with high-energy proton and ion beams, providing access to those regions in the nucleon and nuclei where their structure is dominated by gluons. Moreover, polarized beams in the EIC will give unprecedented access to the spatial and spin structure of the proton, neutron, and light ions. The studies leading to this document were commissioned and organized by the EIC User Group with the objective of advancing the state and detail of the physics program and developing detector concepts that meet the emerging requirements in preparation for the realization of the EIC. The effort aims to provide the basis for further development of concepts for experimental equipment best suited for the science needs, including the importance of two complementary detectors and interaction regions.
This report consists of three volumes. Volume I is an executive summary of our findings and developed concepts. In Volume II we describe studies of a wide range of physics measurements and the emerging requirements on detector acceptance and performance. Volume III discusses general-purpose detector concepts and the underlying technologies to meet the physics requirements. These considerations will form the basis for a world-class experimental program that aims to increase our understanding of the fundamental structure of all visible matter
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Submitted 26 October, 2021; v1 submitted 8 March, 2021;
originally announced March 2021.
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Physics development of web-based tools for use in hardware clusters doing lattice physics
Authors:
P. Dreher,
W. Akers,
J. Chen,
Y. Chen,
C. Watson
Abstract:
Jefferson Lab and MIT are developing a set of web-based tools within the Lattice Hadron Physics Collaboration to allow lattice QCD theorists to treat the computational facilities located at the two sites as a single meta-facility. The prototype Lattice Portal provides researchers the ability to submit jobs to the cluster, browse data caches, and transfer files between cache and off-line storage.…
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Jefferson Lab and MIT are developing a set of web-based tools within the Lattice Hadron Physics Collaboration to allow lattice QCD theorists to treat the computational facilities located at the two sites as a single meta-facility. The prototype Lattice Portal provides researchers the ability to submit jobs to the cluster, browse data caches, and transfer files between cache and off-line storage. The user can view the configuration of the PBS servers and to monitor both the status of all batch queues as well as the jobs in each queue. Work is starting on expanding the present system to include job submissions at the meta-facility level (shared queue), as well as multi-site file transfers and enhanced policy-based data management capabilities.
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Submitted 8 November, 2001;
originally announced November 2001.