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Dr. Patrick Fritzsch

Assistant Professor (Pure & Applied Mathematics)
      
Profile Photo

Dr. Patrick Fritzsch

Assistant Professor (Pure & Applied Mathematics)

 fritzscp@tcd.ie

 


  Hadron and Flavour Physics   High Performance Computing   Lattice Field Theory   Master-field simulation
Project Title
 Physics from the master-field
From
April 2021
To
March 2022
Summary
We have been granted 38M core-h (operational price per core-h: 0.03 EUR) at the DiRAC facility (UK) to establish Lattice QCD calculations using the master-field approach.
Funding Agency
DiRAC, UK
Programme
13th call
Project Type
High-performance Computing
Person Months
1
Project Title
 QCD simulations with stabilised Wilson fermions, towards the physical pion mass at a fine lattice spacing
From
To
Summary
99 Million core-h on supercomputer Hawk@HLRS (Typical operational price tag: 0.05 Euro/core-h)
Funding Agency
Gauss Centre for Computing
Programme
309 Particles, Nulcei and Fields
Project Type
High-performance computing
Project Title
 Lattice QCD simulations with stabilised Wilson quarks for applications in heavy flavour physics
From
To
Summary
45 Million core-h per year on Noctura2@PC2 (Typical operational price tag: 0.05 Euro/core-h)
Funding Agency
German National HPC alliance network
Programme
High-energy physics
Project Type
High-performance computing
Project Title
 QCD simulations with stabilised Wilson quarks for flavour physics applications
From
To
Summary
90 Million core-h on SuperMUC-NG-phase1@LRZ (Typical operational price tag: 0.05 Euro/core-h)
Funding Agency
Gauss Centre for Computing, GCS
Programme
Tier 0 HPC access
Project Type
High-performance computing

Details Date
Expert for European Commission, mostly for EuroHPC activities
Co-founder of the OpenLat initiative (https://openlat1.gitlab.io), overseeing the gauge field generation and leader of the flavour physics & Symanzik improvement working group. Since 2020
External Examiner for Bachelor, Master and PhD thesis in my wider research area Since 2012
Referee for computing grant applications at the Swiss National Supercomputing Centre, Switzerland Since 2025
Language Skill Reading Skill Writing Skill Speaking
English Fluent Fluent Fluent
German Fluent Fluent Fluent
Details Date From Date To
Member of the German Physical Society (DPG) October 1999
Co-founder and leading member of the Open Lattice Initiative, an association of lattice scientists in the EU & US to promote new developments, young researchers and open science. 2019
Kuberski, Simon and Conigli, Alessandro and Fritzsch, Patrick and G{\'e}rardin, Antoine and Heitger, Jochen and Herdo{\'\i}za, Gregorio and Pena, Carlos and Simma, Hubert and Sommer, Rainer, Heavy quark masses from step-scaling, Proceedings of Science, 42th International Symposium on Lattice Field Theory, PoS(LATTICE2025)209, Sissa, 2026, Conference Paper, ACCEPTED
D'Anna, A. and Conigli, A. and Fritzsch, P. and G{\'e}rardin, A. and Heitger, J. and Herdo{\'\i}za, G. and Husung, N. and Kuberski, S. and Pena, C. and Simma, H., Ground-State Extraction of Heavy-Light Meson Semileptonic Decay Form Factors, The 42nd International Symposium on Lattice Field Theory (LATTICE2025), PoS(LATTICE2025)246, Sissa, 2026, Conference Paper, PUBLISHED
Francis, Anthony, Fritzsch, Patrick, Harlander, Robert V., Karur, Rohith, Kim, Jangho, Kohnen, Jonas T., Pederiva, Giovanni, Pefkou, Dimitra A., Rago, Antonio, Shindler, Andrea, Walker-Loud, André, Zafeiropoulos, Savvas, Gradient Flow for Parton Distribution Functions: First Application to the Pion, Physical Review Letters, 136, (17), 2026, Journal Article, PUBLISHED  DOI
Francis, Anthony, Fritzsch, Patrick, Karur, Rohith, Kim, Jangho, Pederiva, Giovanni, Pefkou, Dimitra A., Rago, Antonio, Shindler, Andrea, Walker-Loud, André, Zafeiropoulos, Savvas, Moments of parton distribution functions of the pion from lattice QCD using gradient flow, Physical Review D, 113, (7), 2026, Journal Article, PUBLISHED  DOI
Laurence Sebastian Bowes, Vincent Drach, Patrick Fritzsch, Sofie Martins, Antonio Rago, Fernando Romero-López, The singlet scalar state in a chiral ensemble in S U ( 2 ) SU(2) with two fundamental flavours, 41st International Symposium on Lattice Field Theory (Lattice 2024), Proceedings of Science, 2025, Conference Paper, PUBLISHED  DOI  URL
A. Francis, P. Fritzsch, R. Karur, J. Kim, G. Pederiva, D.A. Pefkou, A. Rago, A. Shindler, A. Walker-Loud, S. Zafeiropoulos, Probing higher moments of pion parton distribution functions, 41st International Symposium on Lattice Field Theory (Lattice 2024), Liverpool, Proceedings of Science, 2025, Conference Paper, PUBLISHED  DOI  URL
Justus T. Kuhlmann, Patrick Fritzsch, Jochen Heitger, Fabian Joswig, Towards charm physics with stabilised Wilson Fermions, 2024, p258 - 258, p258-258 , Journal Article, PUBLISHED  DOI
Rainer Sommer, Alessandro Conigli, Julien Frison, Patrick Fritzsch, Antoine Gérardin, Jochen Heitger, Gregorio Herdoíza, Simon Kuberski, Carlos Pena, Hubert Simma, A strategy for B-physics observables in the continuum limit, 2024, p268 - 268, p268-268 , Journal Article, PUBLISHED  DOI
Laurence Sebastian Bowes, Vincent Drach, Patrick Fritzsch, Antonio Rago, Fernando Romero-López, 2-flavour $SU(2)$ gauge theory with exponential clover Wilson fermions, 2024, p094 - 094, p094-094 , Journal Article, PUBLISHED  DOI
Alessandro Conigli, Julien Frison, Patrick Fritzsch, Antoine Gérardin, Jochen Heitger, Gregorio Herdoíza, Simon Kuberski, Carlos Pena, Hubert Simma, B-physics observables in the continuum from a combination of static and relativistic results, 2024, p005 - 005, p005-005 , Journal Article, PUBLISHED  DOI
  

Page 1 of 11
Sofie Martins, Laurence Sebastian Bowes, Vincent Drach, Patrick Fritzsch, Antonio Rago, Fernando Romero-López, Determination of the pseudoscalar decay constant from SU(2) with two fundamental flavors, 41st International Symposium on Lattice Field Theory (Lattice 2024), Liverpool, Proceedings of Science, 2025, Notes: [https://doi.org/10.22323/1.466.0149], Conference Paper, PUBLISHED
Mattia Dalla Brida, Patrick Fritzsch, Tomasz Korzec, Alberto Ramos, Stefan Sint and Rainer Sommer, A status update on the determination of Λ(Nf=3, MSbar) by the ALPHA collaboration, Proceedings of Science, The 33rd International Symposium on Lattice Field Theory, Kobe International Conference Center, Kobe, Japan , July 14-18, 2015, , PoS(LATTICE 2015)248, 2015, pp1 - 7, Conference Paper, SUBMITTED
Mattia Dalla Brida, Patrick Fritzsch, Tomasz Korzec, Alberto Ramos, Stefan Sint and Rainer Sommer, Towards a new determination of the QCD Lambda parameter from running couplings in the three-flavour theory, Proceedings of Science, 32nd International Symposium on Lattice Field Theory (Lattice 2014), Columbia University, New York, USA, June 23-28, 2014, , PoS(LATTICE2014)291, 2014, pp7 , Conference Paper, PUBLISHED

  


Award Date
Postdoctoral Fellowship at CERN November 2016
Postdoctoral Fellowship in excellence grant SO(IFT) November 2014
Marie Curie Early Stage Researcher October 2008
The Standard Model (SM) of particle physics is a gauged quantum field theory containing the internal symmetries of the unitary product group SU(3)×SU(2)×U(1). The theory is commonly viewed as containing a fundamental set of particles - the leptons, quarks, gauge bosons and the Higgs boson. Within the SM, the SU(3)-color symmetry group is the building block for Quantum Chromodynamics (QCD), the theory of the strong interaction between quarks and gluons. These fundamental particles make up composite hadrons such as the proton, neutron and pion. The complicated nature of this interaction requires to formulate QCD on a space-time lattice in order to determine physical properties of hadrons measured in collider experiments around the world. In my research I employ such a lattice discretisation and high-performant supercomputers or clusters to determine how hadrons decay and interact with each other. Understanding their interaction with high accuracy informs ongoing searches for physics beyond the SM and sheds light on some important scientific questions of our times, e.g., about the baryon asymmetry of our universe or the origin of dark matter. The key tools of my research involve, e.g., programming and running large scale simulations, numerical analysis, flavour physics and effective field theories. I am working on reducing systematic effects in present day lattice QCD calculations with Wilson fermions to push their applicability to processes mainly addressed by other discretisation to date. Ultimately, I want to include electromagnetic (QED) and strong isospin-breaking effects, such that - just as in nature - u, d, s and c quarks are not identical and carry an electric charge. Most recently, I have been working on a better discretisation and establishing the master-field approach as a new way to determine hadron properties.