Special Challenges in Quantum Chromodynamics

8 Jan 2026, 13:30 → 9 Jan 2026, 14:30 Europe/Rome

Galileo Galilei Institute for Theoretical Physics

(Photo by Yuri Dokshitzer)

 

This workshop focuses on advanced topics in perturbative Quantum Chromodynamics (QCD), inspired by  the scientific legacy of Stefano Catani

The central theme of this year's edition is Sudakov resummation. We plan to critically compare different resummation approaches, calculations in direct and conjugate spaces, in Soft Collinear Effective Theory (SCET) and direct QCD, parton showers and automated resummation techniques. Additionally, we will discuss the impact of resummation on heavy-quark fragmentation and shape variables in e+e- annihilation, and its relevance for the accurate determination of the strong coupling.

 

 

Speakers:  U. Aglietti, T. Becher, M. Cacciari, S. Kluth, F. Krauss, G. Ridolfi, G. Zanderighi

 

Organizers:  R. Bonciani, L. Cieri, D. de Florian, P. K. Dhani, G. Ferrera, M. Grazzini,  G. Rodrigo

 

Previous meetings:

Stefano Catani Memorial Symposium 2025

 

 

 

This event is sponsored by:

National Institute for Nuclear Physics (INFN)

 

The Galileo Galilei Institute for Theoretical Physics

SCQCD26.png

Zoom LINK

Thursday 8 January

13:30 Welcome

Introduction

Afternoon session

1 Resummation ambiguities in SCET vs. direct QCD

Speaker: Giovanni Ridolfi (Istituto Nazionale di Fisica Nucleare)

ridolfi.pdf

2 Diagrammatic approaches, effective field theory, parton showers: Similarities and differences among resummation methods

Speaker: Thomas Becher (University of Bern)

becher_GGI.pdf

3 Discussion

16:30 Coffee Break

Afternoon session

4 Resummation for heavy-quark fragmentation in e+e- collisions

Speaker: Matteo Cacciari (LPTHE Paris)

ff.pdf

5 Parton Shower approach to Sudakov resummation

Speaker: Silvia Ferrario Ravasio (Istituto Nazionale di Fisica Nucleare)

2026_01_07_Catani_SudakovResummation_in_PanScales.pdf

6 Discussion

20:30 Social dinner

Friday 9 January

Morning session

7 Experimental determination of alpha_S from semi-inclusive hard processes

Speaker: Stefan Kluth (Max Planck Institute)

kluth.pdf

10:00 Coffee Break

10:30 Group photo

Morning session

8 Saddle-Point approximation in threshold resummation

Speaker: Ugo Giuseppe Aglietti (Istituto Nazionale di Fisica Nucleare)

aglietti-scqcd.pdf

9 Automated resummation for event-shape variables

Speaker: Giulia Marcella Maria Zanderighi

zanderighi.pdf

10 Discussion

Closing

13:00 Lunch