Lepton flavour change in nuclei

14 Apr 2025, 08:30 → 18 Apr 2025, 19:00 Europe/Rome

Aula Renzo Leonardi (ECT*)

Karim Bennaceur (Université Claude Bernard Lyon 1, IP2I), Sacha Davidson (IN2P3, CNRS)

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Lepton flavour change is observed in neutrino oscillations, but not yet in contact interactions among charged leptons – despite decades of active searching and a plethora of models. However, this could change soon, as a huge leap in experimental reach is promised by upcoming searches for μ → e conversion in nuclei. 
The workshop aims to bring together lepton, χPT/nucleon and nuclear theorists, in order to improve the multi-scale theoretical
rate calculations, using state of the art mean-field or shell-model approaches, to the accuracy required by upcoming experiments. Also, in collaboration with experimentalists, we aim to explore feasible and complementary nuclear targets that could best identify the lepton flavour changing interactions.

 

Poster Bennaceur.pdf

Seminario A.Crivellin.pdf

Monday 14 April

08:30 → 08:45 Registration

08:45 → 09:00 Welcome by the ECT* Director

09:00 → 10:15 Introduction to muon -> electron conversion

Speaker: Yoshitaka KUNO (Osaka University)

ECT2025KUNO-2.pdf

10:15 → 10:30 Discussion and Questions

10:30 → 11:00 coffee

11:00 → 11:45 Density Functional Methods in Nuclear Physics

Speaker: Jacek Dobaczewski (University of York)

27Al.Dobaczewski.Trento2025.250414-09b.ppt

Dobaczewski.Trento2025.250414-09.pdf

Dobaczewski.Trento2025.250414-09.ppt

11:45 → 12:00 Discussion+Questions

12:00 → 12:20 tbc (?Self-consistent muon+nucleon wavefunctions)

Speaker: Jacek Dobaczewski (University of York)

12:20 → 12:30 Discussion and Questions

12:30 → 14:00 lunch

14:00 → 14:45 The effect of quadrupole deformation

Speaker: Andrzej Czarnecki (University of Alberta)

14:45 → 15:00 Discussion and Questions

15:00 → 15:45 mu^- to e^+ in nuclei

Speaker: Joe Sato

LNV ECT.pptx

15:45 → 16:00 Discussion and Questions

16:00 → 16:30 coffee

16:30 → 17:15 Search for mu->e conversion with COMET at J-PARC

Speaker: Cristina Carloganu

250414-ECT.pdf

17:15 → 17:30 Discussion and Questions

Tuesday 15 April

09:00 → 09:45 Introduction to chiPT

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

intro-chpt.pdf

09:45 → 10:00 Discussion and Questions

10:00 → 10:20 tbc

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

ECT*-LFV.pdf

10:20 → 10:30 Discussion and Questions

10:30 → 11:00 coffee

11:00 → 11:45 Introduction to Nuclear Effective Theory

Speaker: Ubirajara van Kolck (IJCLab Orsay & University of Arizona)

11:45 → 12:00 Discussion and Questions

12:00 → 12:20 Lepton Number Violation in Nuclear Effective Theory

Speaker: Ubirajara van Kolck (IJCLab Orsay & University of Arizona)

12:20 → 12:30 Discussion and Questions

12:30 → 13:45 lunch

13:45 → 14:15 What are we trying to calculate?

Speaker: Everyone

Trento1.pdf

14:15 → 15:00 Calculations of various muon decays in orbit

Speaker: Yuichi Uesaka

uesaka_20250415.pdf

15:00 → 15:15 Discussion and Questions

15:15 → 15:35 quick coffee

15:35 → 16:05 blackboard discussion: do muons think deformed nuclei are spherically symmetric?

16:05 → 16:50 mu-> e and g-2 in the context of vector-like leptons

Speaker: Kilian Möhling (TU Dresden)

CLFV25-moehling.pdf

16:50 → 17:05 Discussion and Questions

Wednesday 16 April

09:00 → 10:15 Ab initio methods for finite nuclei: an overview

Speaker: Pierre Arthuis (IJCLab Orsay, CNRS & U. Paris-Saclay, France)

Arthuis_Trento_Leptons_2025.pdf

10:15 → 10:30 Discussion and Questions

10:30 → 11:00 coffee

11:00 → 12:10 Iterative linear response methods for atomic nuclei

Speaker: Markus Kortelainen (University of Jyväskylä)

kortelainen.pdf

12:10 → 12:30 Discussion and Questions

12:30 → 14:00 lunch

14:00 → 14:45 Ab initio nuclear responses for mu-> e conversion

Speaker: Matthias Heinz (Oak Ridge National Laboratory)

2025.04.16_ECTstar.pdf

14:45 → 15:00 Discussion and Questions

15:00 → 15:45 Uncertainty quantification of overlap integrals in $\mu\to e$ conversion

Speaker: Frederic Noël (ITP, AEC, Uni Bern)

Presentation_Trento2025_Noel.pdf

15:45 → 16:00 Discussion and Questions

16:00 → 16:45 coffee

16:45 → 17:30 Tbc about 2 Higgs Doublet Models

Speaker: Andreas Crivellin (UZH & PSI)

17:30 → 17:45 Discussion and Questions

18:00 → 18:20 Conference Dinner Later Tonight

Thursday 17 April

09:00 → 09:45 Muon capture helping New Physics studies

Speaker: Lotta Jokiniemi (TRIUMF / TU Darmstadt)

ECTstar_April2025_Jokiniemi.pdf

09:45 → 10:00 Discussion and Questions

10:00 → 10:25 coffee

10:25 → 10:50 Flavour Observables in FlexibleSUSY

Speaker: Dominik Stoeckinger (TU Dresden)

2025AprilLFVWorkshop.pdf

10:50 → 11:00 Discussion and Questions

11:00 → 11:30 Charge distributions in nuclei from mean field calculations

Speaker: Karim Bennaceur (Université Claude Bernard Lyon 1, IP2I)

presentation.pdf

11:30 → 11:40 Discussion and Questions

11:40 → 12:00 Conclusion and Perspectives

Speaker: Sacha Davidson and Karim Bennaceur

Trento2.pdf