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COMETA workshop on polarization tagging for hadronic boosted bosons

1–2 Jul 2026
Perugia
Europe/Zurich timezone

Contribution List

30 out of 30 displayed
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  1. 1. Experimental review for diboson and VBS
    Ankita Mehta (Ghent University (BE))
    01/07/2026, 09:00
  2. 2. Theory review on polarised bosons
    Rene Poncelet (IFJ PAN Krakow)
    01/07/2026, 09:30
  3. 30. Gauge Boson Polarization as a Probe of SMEFT Effects in WZ Production
    Maryam Bayat Makou (Southern Methodist University (US))
    01/07/2026, 10:00

    Diboson production at the LHC provides a powerful probe of the electroweak sector and possible deviations from the Standard Model within the Standard Model Effective Field Theory (SMEFT). We present a study of the interplay between dimension-6 SMEFT operators and gauge boson polarization in $WZ \rightarrow 3\ell$ production at $\sqrt{s}=13~\mathrm{TeV}$.

    The analysis is based on dedicated...

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  4. 4. Traditional jet-substructure observables
    Lorenzo Mai (Università di Genova & INFN Genova)
    01/07/2026, 11:00
  5. 5. Flavour tagging in ATLAS and CMS with machine learning
    Alessandro Calandri (Università & INFN, Firenze (IT))
    01/07/2026, 11:30
  6. 6. Machine learning for jet tagging
    Sophia Vent
    01/07/2026, 12:00
  7. 8. An introduction to quantum computing approaches for optimization problems
    Marco Baioletti (Università degli Studi di Perugia)
    01/07/2026, 14:00
  8. 11. Quantum-Informed Neural Networks
    Mr Aritra Bal (Karlsruhe Institute of Technology), Michael Binder
    01/07/2026, 14:30
  9. 10. Quantum Lund plane for VBS
    Fabrizio Napolitano (Universita e INFN, Perugia (IT))
    01/07/2026, 15:00
  10. 7. TBA
    01/07/2026, 17:00
  11. 9. Discussion
    01/07/2026, 17:30
  12. 12. Discussion
    01/07/2026, 18:00
  13. 14. Modeling hadronic decays in MC generators
    02/07/2026, 08:30
  14. 28. Measuring the polarization of boosted, hadronic $W$ bosons with jet substructure observables
    Songshaptak De (Jožef Stefan Institute)
    02/07/2026, 09:00

    In this work, we present a new technique to measure the longitudinal and transverse polarization fractions of hadronic decays of boosted $W$ bosons. We introduce a new jet substructure observable denoted as $p_\theta$, which is a proxy constructed purely out of subjet energies for the parton level decay polar angle of the $W$ boson in its rest-frame. The distribution of this observable is...

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  15. 15. Discussion
    02/07/2026, 09:30
  16. 16. VBS polarisation measurement (ATLAS)
    Joany Manjarres (Université de Toulouse, CNRS/IN2P3, L2IT, Toulouse, France)
    02/07/2026, 10:30
  17. 27. A polarisation aware classification and regression tagger for boson initiated jets with the ATLAS experiment
    Antonio Giannini (University of Science and Technology of China (CN))
    02/07/2026, 11:00

    Jet tagging is an essential tool for physics analyses involving heavy particles decaying into hadronic final states. In the boosted regime, where bosons have high transverse momentum, their hadronic decay products are reconstructed as a single large-R jet, and identified using jet substructure and constituent-based taggers. Solutions to the classification of hadronic decays of W and Z are...

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  18. 31. A systematic approach to amplitude-assisted polarization tagging
    Erik Bachmann (Technische Universitaet Dresden (DE))
    02/07/2026, 11:30

    Understanding the mechanism of electroweak symmetry breaking (EWSB) remains one of the key open questions to be explored at the LHC. Measurements of vector boson polarization provide an exceptional opportunity to tackle this task due to the direct connection between longitudinal polarization and the EWSB. However, in most processes of interest the (pure) longitudinal component is by far the...

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  19. 32. Discussion
    02/07/2026, 12:00
  20. 26. Prospect studies for polarization measurements in boosted VBS semi-leptonic events
    Mr Tom Allene (Laboratoire des 2 Infinis - Toulouse, CNRS / Univ. de Toulouse (FR))
    02/07/2026, 14:00

    The study of longitudinally polarized vector bosons interactions in the high-energy regime provides direct insight into the electroweak symmetry breaking mechanism through the Goldstone Boson Equivalence Theorem. However, in vector boson scattering (VBS) diboson production, the fraction of longitudinally polarized bosons is small, of the order of 7%, making their measurement particularly...

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  21. 29. Unlocking Hadronic W/Z Boson Polarization Measurements via 3D Designed Decorrelated Tagger
    Amartya Rej (Technische Universitaet Dortmund (DE))
    02/07/2026, 14:30

    W and Z boson polarization is a sensitive probe of electroweak symmetry breaking, as the longitudinal states are physical remnants of the Higgs mechanism and their production fraction is particularly sensitive to anomalous gauge couplings and new physics.
    While leptonic channels provide clean measurements, the hadronic channel — dominant in branching fraction and fully reconstructible in the...

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  22. 21. Discussion
    02/07/2026, 15:00
  23. 22. TBA
    02/07/2026, 16:00
  24. 23. TBA
    02/07/2026, 16:30
  25. 24. Towards a COMETA deliverable
    02/07/2026, 17:00
  26. 3. Discussion
  27. 18. Discussion
  28. 33. Discussion
  29. 17. Experimental perspectives in polarisation tagging
    Antonio Giannini (University of Science and Technology of China (CN))
  30. 20. TBA