Charming Lattice QCD @ CERN 2025

23 Jun 2025, 09:00 → 25 Jun 2025, 15:30 Europe/Zurich

4/3-006 - TH Conference Room (CERN)

Matteo Di Carlo (CERN), Felix Benjamin Erben (CERN), Jacob Friedrich Finkenrath (CERN), Vera Gülpers (University of Edinburgh), Etsuko Itou (Kyoto U.), Andreas Jüttner (CERN), Simon Kuberski (CERN), Laurent Lellouch (CNRS and Aix-Marseille U.), Saša Prelovšek Komelj (Ljubljana U.), Tobias Tsang (CERN)

Charm-quark physics is emerging as an exciting frontier for discovering new physics. Experiments like LHCb are measuring charm quantities with unprecedented precision, while phenomenology offers powerful tests of the Standard Model, making first-principles results in charm physics timely and essential.

Lattice Quantum Field Theories offer a systematically improvable framework for predicting non-perturbative observables from first principles. Lattice QCD has achieved significant consensus on various observables, such as decay constants and quark masses. Applying Lattice QCD to charm physics holds great potential for uncovering new physics, including insights into CP violation.

The Charming Lattice QCD @ CERN 2025 Theory Institute will bring together experts to discuss the latest advances in charm-quark physics, including hadronic D-decays, D-meson mixing and long-distance effects, inclusive semileptonic decays, radiative charm decays, and charm spectroscopy. The goal is to foster collaboration and develop strategies to improve the precision of theoretical predictions, ensuring synergy between lattice QCD, phenomenology, and experiment.


Confirmed speakers:

- Matthew Black (University of Edinburgh)
- Sebastian Dawid (University of Washington)
- Alessandro De Santis (Helmholtz-Institut Mainz and JGU Mainz)
- Matteo Di Carlo (CERN)
- Giuseppe Gagliardi (Università di Roma Tre and INFN sezione di Roma Tre)
- Maxwell T. Hansen (University of Edinburgh)
- Gregorio Herdoiza (Universidad Autónoma de Madrid)
- Gudrun Hiller (Technische Universität Dortmund) 
- Liuming Liu (Institute of Modern Physics, Chinese Academy of Sciences)
- Yan Lyu (RIKEN iTHEMS) 
- Dominik Mitzel (Technische Universität Dortmund)
- Rajnandini Mukherjee (University of Edinburgh)
- Juan Andrés Urrea-Niño (Trinity College Dublin)
- David Wilson (University of Cambridge)

map.pdf

Monday 23 June

09:20 → 09:30 Welcome

charm_intro.pdf

09:30 → 10:30 Charm physics experimentally - selected highlights

Speaker: Dominik Stefan Mitzel (Technische Universitaet Dortmund (DE))

CharmLattice25.pdf

10:30 → 11:00 Coffee break

11:00 → 12:00 Spectroscopy overview

Speaker: David Wilson (University of Cambridge)

charming_lattice_david_wilson_final.pdf

12:00 → 14:00 Lunch break

14:00 → 15:00 Scattering with charmed mesons and baryons

Speaker: Liuming Liu (Institute of Modern Physics, Chinese Academy of Sciences)

CharmScattering.pdf

15:00 → 15:30 Coffee break

15:30 → 16:30 $T_{cc}$

16:30 → 17:30 Discussion session

Speaker: Sasa Prelovsek Komelj

discussion-mon.pdf

18:00 → 20:00 Reception

Tuesday 24 June

09:00 → 10:00 Theory perspective on rare charm decays

Speaker: Gudrun Hiller (Technische Universitaet Dortmund (DE))

10:00 → 10:30 Coffee break

10:30 → 11:30 Inclusive semileptonic decays from lattice QCD: recent developments

Speaker: Alessandro De Santis (Helmholtz-Institut Mainz and Johannes Gutenberg-Universität Mainz)

11:30 → 12:00 Long distance contributions to D-meson mixing

Speaker: Matteo Di Carlo

12:00 → 14:00 Lunch break

14:00 → 15:00 Radiative decays of charmed mesons from lattice QCD: status and future perspectives

Speaker: Giuseppe Gagliardi

15:00 → 15:30 Coffee break

15:30 → 16:30 Hadronic $D$-decays

16:30 → 17:30 Discussion session

Speaker: Shoji Hashimoto (KEK)

Wednesday 25 June

09:30 → 10:30 Precision charm physics

Speaker: Gregorio Herdoiza

10:30 → 11:00 Coffee break

11:00 → 12:00 Recent developments of distillation techniques

Speaker: Juan Andres Urrea Nino

12:00 → 14:00 Lunch break

14:00 → 15:30 Predicting multi-hadron electroweak processes from the QCD path integral (Theory Colloquium)

I will discuss recent progress and open challenges in computing multi-hadron electroweak amplitudes from lattice QCD, a Euclidean, finite-volume, discretised formulation of quantum chromodynamics. Starting from the underlying quarks and gluons, QCD predicts a spectrum of hadrons—such as the pion, kaon, and D meson—whose masses and matrix elements can now be computed with sub-percent precision using numerical lattice QCD. Looking beyond this, an important frontier involves scattering processes with multiple hadrons, including πK → πK, ππK, electroweak transitions such as πγ → ππ, K → ππ, D → ππ, and B → K*, and neutral-meson mixing amplitudes, as well as other long-distance matrix elements. Such observables are essential for interpreting experiments in flavour physics and testing the Standard Model. In this colloquium, I will aim to outline the key theoretical challenges in such calculations, review the methods developed to address them, and highlight a selection of recent results.

Speaker: Max Hansen