Multi-Boson interactions 2026

23 Sept 2026, 08:30 → 25 Sept 2026, 15:00 Europe/Zurich

Margarita Salas Auditorium (CIEMAT)

Multi-Boson Interactions (MBI) is an international conference series focusing on the frontiers of latest experimental results, state-of-art theory calculations and future prospects of physics with multi-boson final states (W, Z, gamma, Higgs, ...) at collider experiments. It aims to bring experimentalists and theorists together in order to discuss multi-boson interactions within the contexts of the gauge sector of the standard model and new physics.

MBI is coordinated by the MBI International Advisory Board (IAB) with the hosting venues rotating intercontinentally: 2013 (TU Dresden), 2014 (BNL), 2015 (DESY), 2016 (Wisconsin), 2017 (KIT, Karlsruhe), 2018 (Michigan), 2019 (Thessaloniki), 2020 (pandemic skip), 2021 (Milan), 2022 (Shanghai), 2023 (UC San Diego) 2024 (Toulouse), 2025 (Brandeis), and 2026 (Madrid).

The conference has plenary sessions only, with a mix of invited talks and submitted contributions.

mapaturisticomadrid_15102025.pdf

mbi-group.jpeg

Wednesday 23 September

08:30 → 09:00 Registration

09:00 → 10:45 Morning session 1

09:00 Introduction and welcome (15')

Speakers: Begona De La Cruz (CIEMAT - Centro de Investigaciones Energéticas Medioambientales y Tec. (ES)), Dermot Anthony Moran (CIEMAT - Centro de Investigaciones Energéticas Medioambientales y Tec. (ES))

MBI26Intro-Dermot.pdf

Welcome_MBI_2026_BdelaCruz.pdf

09:15 Measurements in VBF V and VBS VV (30'+15')

Speaker: Mathieu Markovitch (Centre National de la Recherche Scientifique (FR))

Mathieu_MBI.pdf

10:00 Overview of MC generators for multi-V production (30'+15')

Speaker: Juergen Reuter (DESY Hamburg, Germany)

2026_09_MBI_MCGen.pdf

10:45 → 11:15 coffee break

11:15 → 12:45 Morning session 2

11:15 Multiboson precision measurements (30'+15')

Speaker: Giovanni Battista Marozzo (Laboratory of Instrumentation and Experimental Particle Physics (PT))

Multiboson precision measurements.pdf

12:00 Logarithmic EW corrections at two-loop (30'+15')

Speakers: Jonas Lindert (University of Sussex), Lorenzo Mai (Università di Genova & INFN Genova)

LM_MBI_2026.pdf

12:45 → 14:00 Lunch break

14:00 → 16:00 Evening session 1

14:00 Triboson physics (30'+15')

Speaker: Cristiano Tarricone (Universita e INFN Torino (IT))

MBI2026TribosonPhysics-5.pdf

14:45 NNLO QCD predictions for multiboson processes (30'+15')

Speaker: Stefan Kallweit (University of Zurich (CH))

Kallweit.pdf

15:30 Electroweak production of yyjj (20'+10')

Speaker: Orcun Kolay (Technische Universitaet Dresden (DE))

MBI_Kolay_23_09_2026.pdf

16:00 → 16:30 coffee break

16:30 → 18:15 Evening session 2

16:30 New physics in multibosons (30'+15')

Speaker: Iza Veliscek (Brookhaven National Laboratory (US))

MBI26 - New physics in MBs-5.pdf

17:15 boosted VBS 𝑾±𝑾± H production (20'+10')

Speaker: Alexandro Martone (L2I Toulouse, CNRS/IN2P3, Université de Toulouse)

VBS_VVh_MBI.pdf

17:45 Semileptonic VBS at NLO and EW corrections to polarised ZZ scattering (20'+10')

Speakers: Santiago Lopez Portillo Chavez (Uni Würzburg), Santiago Lopez Portillo Chavez (University of Tübingen)

mbi_madrid_slopez.pdf

18:30 → 20:30 Reception

Thursday 24 September

09:00 → 10:30 Morning session 1

09:00 HH production (30'+15')

Speaker: Giulia Di Gregorio (Université Paris-Saclay (FR))

260924_HH_ATLASCMS.pdf

09:45 Overview of 2-loop effects in SMEFT predictions for Higgs observables (30'+15')

Speaker: Stefano Di Noi (KIT (ITP))

Multiboson_Madrid_2026_DiNoi.odp

Multiboson_Madrid_2026_DiNoi.pdf

Multiboson_Madrid_2026_DiNoi.pdf

Multiboson_Madrid_2026_DiNoi_Static.pdf

10:30 → 11:00 coffee break

11:00 → 12:30 Morning session 2

11:00 Electroweak Restoration: WZ vs Wh rates in SM, SMEFT, and HEFT (30'+15')

Speaker: Ian Lewis (The University of Kansas)

IML_MBI.pdf

11:45 EFT searches (30'+15')

Speaker: Eleonora Rossi (University of Oxford (GB))

EFT_MBI.pdf

12:30 → 14:00 Lunch break

14:00 → 16:00 Evening session 1

14:00 Diboson Polarization and quantum entanglement (30'+15')

Speaker: Alberto Carnelli (Centre National de la Recherche Scientifique (FR))

MBI2026-Pol&qEnt-Carnelli.pdf

14:45 Impact of Higgs boson measurements in SMEFT global fits (30'+15')

Speaker: VICTOR Miralles (University of Alicante)

VMiralles_MBI.pdf

15:30 Measurements in WW final states

Speaker: Sergio Blanco Fernandez (Universidad de Cantabria and CSIC (ES))

MBI-2026-SergioBlanco_v1.pdf

16:00 → 16:30 coffee break

16:30 → 18:30 Evening session 2

16:30 SMEFT effects on spin correlations and entanglement at NLO QCD in di-boson production at hadron colliders (30'+15')

Speaker: Giovanni Pelliccioli (Università degli Studi di Milano-Bicocca)

gp_mbi_26.pdf

17:15 Z boson quantum tomography (30'+15')

Speakers: Morgan Del Gratta, Morgan Del Gratta

delgratta_MBI_2026.pdf

18:00 Quantum entanglement between Z-pairs from the Higgs decay (20'+10')

Speaker: Runxuan Wang (University of Michigan (US))

HZZQE_MBI2026_Max.pdf

20:30 → 23:00 Conference dinner

The conference dinner will take place at DIURNO restaurant:
https://www.diurno.com/
at 20:30

Your choice for the dinner have been collected in:
https://docs.google.com/document/d/1GjGd2YAx512DmdGZMlnCLYPlUbE9ew7fjh7o2uXqTwg/edit?usp=sharing

Friday 25 September

09:30 → 11:15 Morning session 1

09:30 Multiple Higgs production with HEFT (20'+10')

In this work we summarize the main results for the matching of the two most relevant EFTs for BSM Higgs physics, SMEFT and HEFT, for double and triple Higgs production from VBF.  A summary of the matching of the HEFT predictions to the 2HDM predictions for these VBF-mediated processes is also presented. We then discuss how the correlations between the various Higgs effective couplings that appear in the matching can be accessible at colliders.

Speakers: Daniel Domenech Moya (IFT - UAM), Jose Daniel Domenech Moya (IFT - UAM)

MultiHiggs-VBF-HEFT.pdf

10:00 AI/ML for multiboson production and/or future colliders (30'+15')

Speaker: Santiago Folgueras (Universidad de Oviedo (ES))

260925_MBI_MLdiboson_Folgueras_v3.pdf

260925_MBI_MLdiboson_Folgueras_v3.pptx

10:45 Odd Physics Off the Diagonal: Constraining CP-violating SMEFT with Quantum Tomography

Speaker: Patrick Dougan (Southern Methodist University (US))

Dougan_OddPhysicsOffDiagonal_MBI26.pdf

Dougan_OddPhysicsOffDiagonal_MBI26.pptx

11:15 → 11:45 coffee break

11:45 → 13:15 Morning session 2

11:45 Summary talk

Speaker: Georg Ralf Weiglein (Deutsches Elektronen-Synchrotron (DE))

MBI_Madrid_26.pdf

12:45 Farewell

MBI26-closeout-Pleier-250926.pdf