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Non-perturbative renormalization in fundamental and effective theories

→ Europe/Rome
Aula Renzo Leonardi (ECT*)

Aula Renzo Leonardi

ECT*

Strada delle Tabarelle 286, I-38123 Villazzano (Trento)
Evgeny Epelbaum, Jambul Gegelia, Marc Schiffer, Phiala Shanahan, Vincenzo Cirigliano
Description

The renormalization group plays a fundamental role in many areas of physics. Various aspects of perturbative and non-perturbative renormalization have been extensively investigated for decades in different physics contexts. Yet, knowledge gained in one area is often not completely appreciated by experts working on other topics. Bringing together scientists studying various aspects of perturbative and non-perturbative renormalization in fundamental (like quantum gravity and QCD) and effective theories (like chiral perturbation/effective field theory) is expected to be beneficial for all parties.

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PosterGegelia-2026.pdf
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Participants
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  • Mon, March 30
    • 9:00 AM
      Registration
    • 1
      Workshop introduction
      Speakers: Evgeny Epelbaum (Ruhr University Bochum), Marc Shiffer
      Introduction_Epelbaum_Schiffer.pdf
    • 10:20 AM
      Coffee Break
    • 2
      Asymptotically Safe Quantum Gravity: from Fixed Points to the Standard Model
      Speaker: Manuel Reichert (University of Sussex)
      Talk-Trento.pdf
    • 3
      Analytic results in asymptotically safe quantum gravity
      Speaker: Benjamin Knorr (Heidelberg University)
      analytic_Trento.pdf
    • 12:30 PM
      Lunch
    • 4
      Standard-Model like Weyl fermions in asymptotically safe gravity
      Speaker: Moritz Gessner (Institute of theoretical physics, University of Heidelberg)
      weyl-fermions.pdf
    • 5
      Quark and lepton mixing in the Asymptotically Safe Standard Model
      Speaker: Zois Gyftopoulos (Heidelberg University)
      CascadeTalk25mins.pdf
    • 3:00 PM
      Coffee Break
    • 6
      Unitarity at all scales: Towards 2-to-2 scattering of scalars in Asymptotically Safe Quantum Gravity
      Speaker: Angelo Portas Chiesa
      scalar-grav-trento-26.pdf
    • 7
      Welcome
      Speaker: Ubirajara van Kolck (ECT*, Trento)
    • 8
      Discussion
      Speaker: Marc Shiffer
  • Tue, March 31
    • 9
      Higher derivatives and higher energies
      Speaker: John Donoghue (University of Massachusetts, Amherst)
      Trento Donoghue.pdf
    • 10:20 AM
      Coffee Break
    • 10
      PIRGs & PIKs or Physics-Informed Renormalisation: From the reparametrisation of quantum effective actions to the sampling of theories with sign problems
      Speaker: Jan M. Pawlowski (University of Heidelberg)
      talkRGTrento2026_Pawlowski.pdf
    • 11
      Tropical renormalization at 400 loops
      Speaker: Paul-Hermann Balduf (University of Oxford)
      2025_03_Balduf_ECTs.pdf
    • 12:30 PM
      Lunch
    • 12
      Running couplings in a shift-invariant scalar theory
      Speaker: Roberto Percacci (SISSA)
    • 3:00 PM
      Coffee Break
    • 13
      Gauge-Invariant Flows in Asymptotically Safe Quantum Gravity
      Speaker: Paul Sprenger (Institute for Theoretical Physics, Heidelberg University)
      gauge_inv_flows_asqg.pdf
    • 14
      Discussion
      Speaker: Michael Birse (University of Manchester)
  • Wed, April 1
    • 15
      Renormalization in short-range EFT
      Speaker: Hans-Werner Hammer (TU Darmstadt)
      ECT26HWH.pdf
    • 10:20 AM
      Coffee Break
    • 16
      Dimer Effective Field theory
      Speaker: David Kaplan (University of Washington)
      Dimer EFT (arXiv:2603.28842)
      DimerEFT.pdf
    • 17
      Chiral nuclear forces within gradient-flow regularization
      Speaker: Hermann Krebs (Ruhr-University Bochum)
      talk.pdf
    • 12:30 PM
      Lunch
    • 18
      Nucleon-nucleon interaction from covariant chiral Lagrangians
      Speaker: Xiu-Lei Ren (Shandong University)
      2026_ECTstar_NN_covariant.pdf
    • 3:00 PM
      Coffee Break
    • 19
      Uses of gradient flow renormalization group
      Speaker: Gerrit Schierholz (DESY)
      ectREN.pdf
    • 20
      Discussion
      Speaker: Vincenzo Cirigliano (Institute for Nuclear Theory, University of Washington)
  • Thu, April 2
    • 21
      Renormalization in few-body systems with a cutoff
      Speaker: Ashot Gasparyan (Ruhr-Universität Bochum)
      Gasparyan.pdf
    • 10:20 AM
      Coffee Break
    • 22
      Singular potentials from chiral EFT and their renormalization
      Speaker: Bingwei Long (Sichuan University)
    • 23
      A new class of three nucleon forces and their implications
      Speaker: Maria Dawid (Washington University in St. Louis)
      ECTstar.pdf
    • 12:30 PM
      Lunch
    • 24
      Unitarity with pions
      Speaker: Harald Griesshammer (George Washington University)
      griesshammer.unitaritylimit.pdf
    • 3:00 PM
      Coffee Break
    • 25
      Discussion
      Speaker: John Donoghue (University of Massachusetts, Amherst)
    • 8:00 PM
      Social dinner at Orso Grigio restaurant, Via degli Orti, 19, 38122 Trento
  • Fri, April 3
    • 26
      Vacuum-Angle in the Hamiltonian Formulation beyond Semiclassics
      Speaker: Uwe-Jens Wiese (University of Bern, Switzerland)
      Trento2026.pdf
    • 10:20 AM
      Coffee Break
    • 27
      Confinement without dynamical symmetry breaking in chiral gauge theories
      Speaker: Alvaro Pastor Gutierrez (RIKEN iTHEMS)
      AlvaroPastorGutierrez_Chiral-gauge_4_26.pdf
    • 11:40 AM
      Lunch
    • 28
      Concluding remarks, future directions, etc
      Speakers: Marc Shiffer, Vincenzo Cirigliano (Institute for Nuclear Theory, University of Washington)
      Final-Discussion.pdf
    • 2:10 PM
      End of the Workshop