Bridging TMD Frameworks: Intersections, Tensions, and Applications

Mar 9, 2026, 9:00 AM → Mar 13, 2026, 7:00 PM Europe/Rome

Aula Renzo Leonardi (ECT*)

Aleksandra Lelek, Alexey Vladimirov, Giovanni Antonio Chirilli, Maria Zurita (Complutense University of Madrid - IPARCOS)

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The Electron-Ion Collider (EIC) will open a new frontier in exploring the internal dynamics of hadrons and nucl , offering precision access to the three-dimensional structure of matter. Transverse Momentum Dependent (TMD) distributions are essential tools for interpreting EIC observables, but the theoretical landscape behind them remains fragmented. Multiple formalisms—including SCET-based factorization, CSS resummation, small-x evolution, and parton branching approaches—offer different definitions, evolution equations, and assumptions.

This event brings together experts from these distinct frameworks to confront foundational differences and assess their phenomenological implications. Key goals include clarifying the compatibility of non-linear small-x dynamics with perturbative resummation, understanding scheme dependence in evolution kernels, and identifying observables sensitive to these theoretical distinctions.

The program is expected to yield a roadmap for harmonizing or delineating the domains of existing approaches, define benchmark processes relevant to EIC phenomenology, and initiate collaborative work toward a unified QCD description of transverse momentum dynamics. By bridging methodological boundaries, this meeting supports the development of a coherent theory toolkit for the EIC and strengthens the theoretical foundations of QCD analysis.

Poster_CHIRILLI.pdf

Mon, March 9

9:00 AM → 10:00 AM Registration

10:00 AM → 11:00 AM Welcome and Introduction

Introduction.pdf

11:00 AM → 11:45 AM Coffe Break

11:45 AM → 12:45 PM Beyond twist-2 TMDs: Generalized TMDs, NLP TMDs, quasiTMDs

Speaker: Simone Rodini (Pavia U & INFN Pavia)

rodini_trento.pdf

12:45 PM → 2:30 PM Lunch

2:30 PM → 3:30 PM Towards Global TMD fits with Neural Networks

Speaker: Matteo Cerutti (CEA Paris-Saclay)

Cerutti_Trento.pdf

3:30 PM → 4:00 PM Coffe break

4:00 PM → 4:40 PM Transverse Spin Effects at NLO Accuracy in Semi-Inclusive Deep Inelastic Scattering

Speaker: Diego Scantamburlo (University of Tübingen - University of Trento)

Scantamburlo_ECT.pdf

4:40 PM → 5:20 PM Matching relations for gluon TMDs up to one-loop accuracy

Speaker: Alessio Carmelo Alvaro (Università di Pavia e INFN)

Alvaro_Trento.pdf

8:00 PM → 10:00 PM Dinner Restaurant Green Tower

Tue, March 10

9:00 AM → 10:00 AM Helicity TMDs at small x: exact results at large Nc&Nf

Speaker: Prof. Yuri Kovchegov (The Ohio State University)

Trento_2026.pdf

Trento_2026.pptx

10:00 AM → 10:45 AM Coffe break

10:45 AM → 11:45 AM TBA

11:45 AM → 12:45 PM Diffractive TMDs and their evolution

Speaker: Dionysios Triantafyllopoulos (ECT*, Italy)

Dionisi.pdf

12:45 PM → 2:30 PM Lunch

2:30 PM → 3:30 PM High-Energy factorisation at NLO from collinear factorisation and connections to TMD-evolution

Speaker: Maksim Nefedov (Ben Gurion University)

Nefedov_HEF-NLO_Trento.pdf

3:30 PM → 4:00 PM Coffe break

4:00 PM → 5:00 PM Gluon splitting at small x: a unified derivation for the JIMWLK, DGLAP and CSS equations

Speaker: Paul Caucal (Subatech)

caucal_trento_2026.pdf

5:00 PM → 6:00 PM Discussion session

Wed, March 11

9:00 AM → 10:00 AM Quark TMD in SIDIS at small x

Speaker: Jamal Jalilian-Marian (Baruch College, CUNY)

ect*-03-2026.pdf

10:00 AM → 10:45 AM Coffe break

10:45 AM → 11:45 AM Quark TMDs from back-to-back dijets in pA collision

Speaker: Swaleha Mulani (University of Jyvaskyla)

11:45 AM → 12:45 PM TMD extractions with artemide

Speaker: Alejandro Bris Cuerpo (Universidad Complutense Madrid)

BridgingTMD_AlejandroBris.pdf

12:45 PM → 2:30 PM Lunch

2:30 PM → 3:30 PM Transverse Momentum Moments

Speaker: Alexey Vladimirov (Universidad Complutense de Madrid)

Vladimirov_TMM.pdf

3:30 PM → 4:00 PM Coffe break

4:00 PM → 5:00 PM Rapidity-only TMD factorization

Speaker: Ian Balitsky (JLab/ODU)

QCDevolution26.pdf

5:00 PM → 6:00 PM Next-to-next-to-leading power corrections to unpolarized Semi-Inclusive Deep Inelastic Scattering

Speaker: Alexei Prokudin (PSU Berks and Jefferson Lab)

Prokudin_Trento26.pdf

8:00 PM → 10:00 PM Dinner Restaurant Due Mori

Thu, March 12

9:00 AM → 10:00 AM TMD PB method: a MC approach based on TMD factorization

Speaker: Aleksandra Lelek

PBSeminar-March26-OlaLelek.pdf

10:00 AM → 10:45 AM Coffe break

10:45 AM → 11:45 AM Collins asymmetries for pion-in-jet production in polarized pp and ep collisions

Speaker: Umberto D'Alesio (University and INFN Cagliari)

pion-jet_pp_ep_DAlesio.pdf

pion-jet_pp_ep_DAlesio.pptx

11:45 AM → 12:45 PM Balancing the phenomenology of TMD Sivers function

Speaker: Filippo Delcarro (IFJ PAN)

Delcarro - Bridging TMDs @ Trento.pdf

12:45 PM → 2:30 PM Lunch

2:30 PM → 3:30 PM Building bridges from TMD phenomenology to the wider QCD landscape

Speaker: Andrea Simonelli (INFN Roma 1)

ECT_Trento_2026.pdf

3:30 PM → 4:00 PM Coffe break

4:00 PM → 5:00 PM A new TMD factorization relating large-x and small-x

Speaker: Shaswat Tiwari (BNL)

TMD_intersections_talk_Shaswat.pdf

5:00 PM → 6:00 PM Discussion session

Fri, March 13

9:00 AM → 10:00 AM Anti-Collinear resummation: from JIMWLK to BFKL

M.Nefedov, A.Kovner, M.Lublinsky and V. Skokov; based on https://arxiv.org/pdf/2601.02131 + new results on running coupling

Speaker: Maksim Nefedov (Ben Gurion University)

Nefedov_Trento.pdf

10:00 AM → 10:45 AM Coffe break

10:45 AM → 11:30 AM From Non-Local OPE to High-Energy OPE

Speaker: Giovanni Antonio Chirilli (National Centre for Nuclear Research (NCBJ), Warsaw)

BridgeTMD-ECT-13mar26.pdf

11:30 AM → 11:45 AM Closing remarks

12:45 PM → 2:30 PM Lunch