Non-perturbative renormalization in fundamental and effective theories

Mar 30, 2026, 9:00 AM → Apr 3, 2026, 7:00 PM Europe/Rome

Aula Renzo Leonardi (ECT*)

Evgeny Epelbaum, Jambul Gegelia, Marc Schiffer, Phiala Shanahan, Vincenzo Cirigliano

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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Supporting institutions and projects

      

 

PosterGegelia-2026.pdf

Mon, March 30

9:00 AM → 9:45 AM Registration

9:45 AM → 10:20 AM Workshop introduction

Speakers: Evgeny Epelbaum (Ruhr University Bochum), Marc Shiffer

Introduction_Epelbaum_Schiffer.pdf

10:20 AM → 10:50 AM Coffee Break

10:50 AM → 11:40 AM Asymptotically Safe Quantum Gravity: from Fixed Points to the Standard Model

Speaker: Manuel Reichert (University of Sussex)

Talk-Trento.pdf

11:40 AM → 12:30 PM Analytic results in asymptotically safe quantum gravity

Speaker: Benjamin Knorr (Heidelberg University)

analytic_Trento.pdf

12:30 PM → 2:00 PM Lunch

2:00 PM → 2:30 PM Standard-Model like Weyl fermions in asymptotically safe gravity

Speaker: Moritz Gessner (Institute of theoretical physics, University of Heidelberg)

weyl-fermions.pdf

2:30 PM → 3:00 PM Quark and lepton mixing in the Asymptotically Safe Standard Model

Speaker: Zois Gyftopoulos (Heidelberg University)

CascadeTalk25mins.pdf

3:00 PM → 3:30 PM Coffee Break

3:30 PM → 4:00 PM 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

4:00 PM → 4:15 PM Welcome

Speaker: Ubirajara van Kolck (ECT*, Trento)

4:15 PM → 5:15 PM Discussion

Speaker: Marc Shiffer

Tue, March 31

9:30 AM → 10:20 AM Higher derivatives and higher energies

Speaker: John Donoghue (University of Massachusetts, Amherst)

Trento Donoghue.pdf

10:20 AM → 10:50 AM Coffee Break

10:50 AM → 11:40 AM 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

11:40 AM → 12:30 PM Tropical renormalization at 400 loops

Speaker: Paul-Hermann Balduf (University of Oxford)

2025_03_Balduf_ECTs.pdf

12:30 PM → 2:10 PM Lunch

2:10 PM → 3:00 PM Running couplings in a shift-invariant scalar theory

Speaker: Roberto Percacci (SISSA)

3:00 PM → 3:30 PM Coffee Break

3:30 PM → 4:00 PM Gauge-Invariant Flows in Asymptotically Safe Quantum Gravity

Speaker: Paul Sprenger (Institute for Theoretical Physics, Heidelberg University)

gauge_inv_flows_asqg.pdf

4:00 PM → 5:15 PM Discussion

Speaker: Michael Birse (University of Manchester)

Wed, April 1

9:30 AM → 10:20 AM Renormalization in short-range EFT

Speaker: Hans-Werner Hammer (TU Darmstadt)

ECT26HWH.pdf

10:20 AM → 10:50 AM Coffee Break

10:50 AM → 11:40 AM Dimer Effective Field theory

Speaker: David Kaplan (University of Washington)

Dimer EFT (arXiv:2603.28842)

DimerEFT.pdf

11:40 AM → 12:30 PM Chiral nuclear forces within gradient-flow regularization

Speaker: Hermann Krebs (Ruhr-University Bochum)

talk.pdf

12:30 PM → 2:10 PM Lunch

2:10 PM → 3:00 PM Nucleon-nucleon interaction from covariant chiral Lagrangians

Speaker: Xiu-Lei Ren (Shandong University)

2026_ECTstar_NN_covariant.pdf

3:00 PM → 3:30 PM Coffee Break

3:30 PM → 4:20 PM Uses of gradient flow renormalization group

Speaker: Gerrit Schierholz (DESY)

ectREN.pdf

4:20 PM → 5:15 PM Discussion

Speaker: Vincenzo Cirigliano (Institute for Nuclear Theory, University of Washington)

Thu, April 2

9:30 AM → 10:20 AM Renormalization in few-body systems with a cutoff

Speaker: Ashot Gasparyan (Ruhr-Universität Bochum)

Gasparyan.pdf

10:20 AM → 10:50 AM Coffee Break

10:50 AM → 11:40 AM Singular potentials from chiral EFT and their renormalization

Speaker: Bingwei Long (Sichuan University)

11:40 AM → 12:30 PM A new class of three nucleon forces and their implications

Speaker: Maria Dawid (Washington University in St. Louis)

ECTstar.pdf

12:30 PM → 2:10 PM Lunch

2:10 PM → 3:00 PM Unitarity with pions

Speaker: Harald Griesshammer (George Washington University)

griesshammer.unitaritylimit.pdf

3:00 PM → 3:30 PM Coffee Break

3:30 PM → 5:15 PM Discussion

Speaker: John Donoghue (University of Massachusetts, Amherst)

8:00 PM → 10:00 PM Social dinner at Orso Grigio restaurant, Via degli Orti, 19, 38122 Trento

Fri, April 3

9:30 AM → 10:20 AM Vacuum-Angle in the Hamiltonian Formulation beyond Semiclassics

Speaker: Uwe-Jens Wiese (University of Bern, Switzerland)

Trento2026.pdf

10:20 AM → 10:50 AM Coffee Break

10:50 AM → 11:40 AM Confinement without dynamical symmetry breaking in chiral gauge theories

Speaker: Alvaro Pastor Gutierrez (RIKEN iTHEMS)

AlvaroPastorGutierrez_Chiral-gauge_4_26.pdf

11:40 AM → 1:20 PM Lunch

1:20 PM → 2:10 PM Concluding remarks, future directions, etc

Speakers: Marc Shiffer, Vincenzo Cirigliano (Institute for Nuclear Theory, University of Washington)

Final-Discussion.pdf

2:10 PM → 2:30 PM End of the Workshop