QCDSF

QCDSF
Name	QCDSF
Type	Research collaboration
Field	Quantum chromodynamics
Established	1990s
Headquarters	DESY, University of Edinburgh, University of Regensburg
Countries	Germany, United Kingdom, Poland, Italy, Switzerland, Netherlands

QCDSF

QCDSF is an international research collaboration focused on lattice studies of quantum chromodynamics. The group brings together researchers from universities and laboratories across Europe and collaborates with computing centers and experimental facilities to study hadron structure, spectroscopy, and matrix elements. Its work intersects with efforts at major institutions and projects in theoretical and computational particle physics.

Overview

QCDSF investigates non-perturbative aspects of Quantum chromodynamics using lattice gauge theory techniques, aiming to compute properties of hadrons such as nucleons and mesons. The collaboration publishes lattice determinations of masses, form factors, parton distribution amplitudes, and low-energy constants relevant to comparisons with measurements from CERN, DESY, Jefferson Lab, J-PARC, and SLAC National Accelerator Laboratory. Members often coordinate with groups at Riken, INFN, Deutsches Elektronen-Synchrotron, and national laboratories in Poland and the Netherlands.

Collaboration and Participating Institutions

Participating institutions have included universities and research centers such as University of Edinburgh, Humboldt University of Berlin, University of Regensburg, University of Liverpool, University of Glasgow, University of Bonn, DESY, Rijnhuizen (NIKHEF), INFN Sezione di Milano, University of Wuppertal, Universität Mainz, and Cyprus Institute. The collaboration has ties with computing centers at Jülich Research Centre, Deutsches Klimarechenzentrum, Hartree Centre, and national supercomputing facilities tied to projects at PRACE. QCDSF members frequently coauthor papers with researchers from KEK, CERN Theory Department, Max Planck Institute for Physics, and Institute for Nuclear Physics (IKP) groups.

Research Focus and Methodology

QCDSF employs lattice discretizations such as Wilson, clover, and twisted mass fermions to study hadronic observables, often comparing results using nonperturbative renormalization and chiral extrapolation techniques. Methodological developments include algorithmic advances related to Hybrid Monte Carlo, deflation, multigrid solvers, and improved actions used in collaborations with teams at IBM Research, NVIDIA Research, and Intel Labs. Target observables include nucleon axial charge, electromagnetic form factors, meson spectroscopy, and matrix elements relevant to searches at LHCb, ATLAS, CMS, and flavor experiments like Belle II. The collaboration interfaces with phenomenology groups at Institute for Theoretical Physics, University of Regensburg, SISSA, CERN PH-TH, and lattice consortia such as ETM Collaboration and RBC-UKQCD.

Major Results and Publications

QCDSF has produced peer-reviewed determinations of hadron masses and form factors, contributions to the nucleon sigma term, and studies of flavor-singlet observables relevant to Dark Energy Survey-adjacent phenomenology and beyond-the-Standard-Model searches at Fermilab. Publications appear in journals where researchers from University of Southampton, University of Mainz, University of Pisa, University of Regensburg, and Hamburg University contribute. Results are often cited alongside work by MILC Collaboration, HPQCD Collaboration, BMW Collaboration, and JLQCD Collaboration in global averages compiled by panels associated with Particle Data Group and review articles from European Physical Journal C and Physical Review D.

Computing Infrastructure and Resources

Large-scale simulations by QCDSF rely on petascale and pre-exascale resources at centers including Jülich Research Centre, Deutsches Klimarechenzentrum, Hartree Centre, national infrastructures managed under PRACE, and regional clusters at participating universities such as University of Edinburgh and DESY. The collaboration utilizes software stacks and libraries developed in conjunction with projects like Chroma, DDalphaAMG, and community toolkits maintained by USQCD and ILDG. GPU-accelerated code leverages hardware from NVIDIA and CPU resources from vendors such as Intel Corporation in coordination with vendor-supported performance teams and benchmarking efforts at HPC Wales.

History and Development

Founded in the 1990s by researchers from several European laboratories, the collaboration evolved through phases of algorithmic innovation and expanding membership across Germany, the United Kingdom, Italy, Poland, and Switzerland. Early milestones include participations in workshops at CERN and symposia of the International Conference on High Energy Physics and Lattice Conference series. Over time the group established regular meetings at institutions like DESY and University of Edinburgh and formed working groups focused on renormalization, spectroscopy, and nucleon structure that mirror organizational approaches used by RBC Collaboration and ETMC. The collaboration continues to adapt to advances in hardware and methodology while contributing to coordinated European efforts in lattice field theory.

Category:Lattice QCD collaborations