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10th RED LHC workshop

29 June 2026 to 1 July 2026
Universitat de Barcelona
Europe/Madrid timezone

Contribution List

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  1. 59. Welcome
    Ricardo Vazquez Gomez (University of Barcelona (ES))
    29/06/2026, 15:00
  2. 34. Limits on new strongly interacting matter from measurements of Transverse Energy-Energy Correlations at the LHC (15'+5')
    Javier Llorente Merino (CIEMAT - Centro de Investigaciones Energéticas Medioambientales y Tec. (ES))
    29/06/2026, 15:15
  3. 32. Discovering hadron structures with jet observables (15'+5')
    IGNAZIO Scimemi (Universidad Complutense madrid)
    29/06/2026, 15:35
  4. 33. Measurement of the fragmentation properties of Υ(nS) mesons inside jets (15'+5')
    Javier Llorente Merino (CIEMAT - Centro de Investigaciones Energéticas Medioambientales y Tec. (ES))
    29/06/2026, 15:55
  5. 35. Top physics at CMS (15'+5')
    Barbara Alvarez Gonzalez (Universidad de Oviedo (ES))
    29/06/2026, 17:00
  6. 36. Search for the production of a Higgs boson in association with a single top quark and and combined measurement of tH production in at 13 TeV with the ATLAS detector (15'+5')
    Carlos Escobar Ibañez (Instituto de Física Corpuscular (IFIC), CSIC‐UV, Spain)
    29/06/2026, 17:20
  7. 37. Probing the Higgs–top Yukawa interaction in the ttH and tH processes with H->yy (15'+5')
    Ana Rosario Cueto Gomez (Universidad Autonoma de Madrid (ES))
    29/06/2026, 17:40
  8. 39. Efficient modeling of Di-Higgs signals in EFT (15'+5')
    Elvira Martin Viscasillas (CIEMAT - Centro de Investigaciones Energéticas Medioambientales y Tec. (ES))
    30/06/2026, 10:00
  9. 40. Spin-correlation in the Higgs decay to W bosons at CMS (15'+5')
    Sergio Blanco Fernandez (Universidad de Cantabria and CSIC (ES))
    30/06/2026, 10:20
  10. 41. Testing CP-odd Higgs bosons via the hZ channel at the LHC (15'+5')
    Sven Heinemeyer (CSIC (Madrid, ES))
    30/06/2026, 10:40
  11. 42. Exploring the SMEFT landscape: Bayesian Model Selection for indirect discovery (15'+5')
    Luca Mantani (IFIC, Valencia)
    30/06/2026, 11:40
  12. 43. LHC signatures of a CP-violating Higgs portal: Playing "hide & seek" with baryogenesis (15'+5')
    Jose Miguel No (IFT-UAM/CSIC)
    30/06/2026, 12:00
  13. 44. Search for new physics in high energy dilepton final states with CMS detector (15'+5')
    Begona De La Cruz (CIEMAT - Centro de Investigaciones Energéticas Medioambientales y Tec. (ES))
    30/06/2026, 12:20
  14. 45. Higgs anomalous couplings from multi-boson production (15'+5')
    Juan José Sanz-Cillero (Universidad Complutense de Madrid & IPARCOS)
    30/06/2026, 12:40
  15. 55. The future of theoretical predictions on a quantum computer (15'+5')
    German Rodrigo (IFIC UV-CSIC)
    30/06/2026, 15:00
  16. 54. Searches for long-lived particles at LHCb with BuSca (15'+5')
    Jiahui Zhuo (Univ. of Valencia and CSIC (ES))
    30/06/2026, 15:20
  17. 56. Future-Ready Restoration: A Case Study on AI RAG-Enhanced Agentic Revival of a Run-2 2016 $\Lambda b \rightarrow \Lambda \gamma$ Analysis (15'+5')
    Cilicia Uzziel Perez (La Salle, Ramon Llull University (ES))
    30/06/2026, 15:40
  18. 53. The Future HL-LHC Computing Model (15'+5')
    Antonio Perez-Calero Yzquierdo (Centro de Investigaciones Energéticas Medioambientales y Tecnológicas)
    30/06/2026, 16:05
  19. 52. Recent studies on rare $b \rightarrow s\ell\ell$ transitions at LHCb (15'+5')
    Felipe Luan Souza De Almeida (University of Barcelona (ES))
    30/06/2026, 17:00
  20. 51. Impact of Hadronic Resonances on $B \rightarrow K^{(*)}\tau^{+}\tau^{-}$ decays (15'+5')
    Guillermo Baltà Foix
    30/06/2026, 17:20
  21. 57. Search for dark matter produced in association with top quarks (15'+5')
    Alicia Calderon Tazon (Universidad de Cantabria and CSIC (ES)), Jónatan Piedra (IFCA (Universidad de Cantabria - CSIC))
    30/06/2026, 17:45
  22. 58. Probing the $D_{sJ}(M)^{+}$ states nature at the LHCb experiment (15'+5')
    Ivan Cambon Bouzas (Universidade de Santiago de Compostela (ES))
    30/06/2026, 18:05
  23. 46. Track and Vertex Reconstruction with the ATLAS Inner Detector (15'+5')
    Salvador Marti I Garcia (IFIC-Valencia (UV/EG-CSIC))
    01/07/2026, 10:00
  24. 47. Studies of track reconstruction performance in the ATLAS Event Filter for the HL-LHC (15'+5')
    Marco Aparo (Institut de Física d’Altes Energies (IFAE), Spain)
    01/07/2026, 10:20
  25. 48. Track reconstruction in the LHCb Run 3 trigger system (15'+5')
    Lukas Calefice (Universitat de Barcelona / ICCUB)
    01/07/2026, 10:40
  26. 49. Jet charge identification with the detectors at LHC (15'+5')
    Alvaro Lopez Solis (CIEMAT - Centro de Investigaciones Energéticas Medioambientales y Tec. (ES))
    01/07/2026, 11:40
  27. 50. Transformer Neural Networks for identification of hadronically decaying τ-leptons in ATLAS (15'+5')
    Nadav Michael Tamir (Institut de Física d’Altes Energies (IFAE))
    01/07/2026, 12:00
  28. 61. Red COMCHA status (15'+5')
    Arantza De Oyanguren Campos (Univ. of Valencia and CSIC (ES))
    01/07/2026, 12:25
  29. 60. Past, present and future of the RedLHC (discussion)
    Salvador Marti I Garcia (IFIC-Valencia (UV/EG-CSIC))
    01/07/2026, 12:45
  30. 1. Discovering hadron structures with jet observables
    Ignazio Scimemi (Universidad Complutense (ES))

    Jets are perturbative stable object that are very common in collider physics. Measuring jets together with hadrons provides insights on how quarks and gluons move inside a hadron in 3D. This information is essential to understand QCD as a solid state framework.

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  31. 6. Efficient modeling of Di-Higgs signals in EFT
    Elvira Martin Viscasillas (CIEMAT - Centro de Investigaciones Energéticas Medioambientales y Tec. (ES))

    Since the discovery of the Higgs boson in 2012, significant efforts have been made to understand this key component of the Standard Model of particle physics. Following years of studying and measuring the properties of this particle, the LHC is now focusing on the trilinear Higgs self-coupling and di-Higgs production. While a potential SM discovery is on the horizon –thanks to recent progress...

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  32. 7. Exploring the SMEFT landscape: Bayesian Model Selection for indirect discovery
    Luca Mantani (IFIC, Valencia)

    The Standard Model Effective Field Theory (SMEFT) provides a systematic, model-independent extension of the Standard Model through higher-dimensional operators, enabling collider data to be interpreted in the presence of heavy new physics. In recent years, global SMEFT analyses have achieved substantial progress in constraining the parameter space, yet their discovery potential remains limited...

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  33. 22. From Discovery to Identification: Machine Learning for Scalar–Vector Leptoquark Discrimination
    Dr Rosa María Sandá Seoane (Instituto de Física Teórica (IFT) UAM-CSIC)

    We present a novel machine learning framework for the characterization of leptoquark (LQ) signals at the Large Hadron Collider, focusing on the discrimination between scalar (SLQ) and vector (VLQ) hypotheses. The method is based on a two-stage inference pipeline that combines a classifier trained to separate Standard Model backgrounds from a mixed LQ signal with a second classifier designed to...

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  34. 23. Future-Ready Restoration: A Case Study on AI RAG-Enhanced Agentic Revival of a Run-2 2016 Λb → Λγ Analysis
    Cilicia Uzziel Perez (La Salle, Ramon Llull University (ES))

    Published scientific results routinely depend on multi-year workflows in which software stacks evolve, personnel rotate, and tacit analytical choices survive only in scripts that no longer execute — making reproduction sometimes harder than re-derivation. We present a retrieval-augmented generation (RAG) and agentic assistant architecture targeting this preservation problem, stress-tested on...

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  35. 18. Higgs anomalous couplings from multi-boson production
    Juan José Sanz-Cillero (Universidad Complutense de Madrid & IPARCOS)

    We discuss various aspects of multi-boson (H,W,Z) production from longitudinal electroweak (EW) gauge boson scattering in the TeV region as the necessary information to characterise the Flare function, F(h), which determines whether the Standard Model EFT (SMEFT) or the Higgs EFT (HEFT) is the appropriate description. We analyze various correlations among Higgs couplings that help decide, from...

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  36. 5. Impact of Hadronic Resonances on $B\to K^{(*)}\tau^+\tau^-$ decays
    Guillermo Baltá Foix
    1

    Neutral-current semileptonic $B$ decays are plagued by hadronic resonances across the dilepton invariant-mass squared spectrum, $q^2$. For light leptons, $\ell=e,\mu$, these resonances can be avoided with suitable $q^2$ cuts. This strategy is less straightforward for $\tau$ modes, where missing energy from the $\tau$ decay makes $q^2$ difficult to reconstruct. In fact, while Belle II is able...

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  37. 20. Jet charge identification with the detectors at LHC
    Alvaro Lopez Solis (CIEMAT - Centro de Investigaciones Energéticas Medioambientales y Tec. (ES))

    Improvements in jet property identification and reconstruction over recent years have enabled the discovery and precise measurement of key Standard Model processes. In particular, the development of increasingly powerful jet-flavour tagging algorithms has been instrumental in the observation of the Higgs boson decaying to bottom quarks (H→bb). These techniques will also play a central role in...

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  38. 14. LHC signatures of a CP-violating Higgs portal: Playing "hide & seek" with baryogenesis
    Jose Miguel No (IFT-UAM/CSIC)

    Extended scalar sectors can yield baryogenesis at the EW scale, by providing the needed departure from thermal equilibrium (absent in the SM) via a first-order EW phase transition. Yet, BSM sources of CP violation are also required for baryogenesis, despite being very strongly constrained experimentally by electric dipole moments (EDMs). In this talk I will discuss a CP-violating Higgs portal...

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  39. 4. Limits on new strongly interacting matter from measurements of Transverse Energy-Energy Correlations at the LHC
    Javier Llorente Merino (CIEMAT - Centro de Investigaciones Energéticas Medioambientales y Tec. (ES))

    This work establishes 95% confidence level limits to models incorporating additional fermions sensitive to the strong interaction. Precision measurements of Transverse Energy-Energy Correlations at the ATLAS experiment are used, exploiting their dependence on the strong coupling constant to analyse the effects of introducing new fermions with colour charge on the Renormalisation Group...

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  40. 3. Measurement of the fragmentation properties of Υ(nS) mesons inside jets
    Javier Llorente Merino (CIEMAT - Centro de Investigaciones Energéticas Medioambientales y Tec. (ES))

    A measurement of the fragmentation properties of $\Upsilon(\mathrm{nS})$ mesons inside jets using $138~\mathrm{fb}^{-1}$ of proton--proton collisions at $\sqrt{s} = 13$ TeV is presented. The $\Upsilon(\mathrm{nS})$ mesons are reconstructed via their decays to pairs of oppositely charged muons and are associated with anti-$k_{\mathrm{T}}$ jets if both muons are clustered among the jet...

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  41. 11. Probing the $D_{sJ}(M)^+$ states nature at the LHCb experiment
    Ivan Cambon Bouzas (Universidade de Santiago de Compostela (ES))

    The discovery of new hadronic states, particularly those considered exotic (tetraquarks, hadronic molecules, etc.), is fundamental to reduce the lack of knowledge on the QCD bound states rules. At the experimental level, in some cases, the measured nature of the new states and their properties do not match the theory predictions, making their nature unclear. This is the case of the...

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  42. 24. Probing the Higgs–top Yukawa interaction in the ttH and tH processes with H->yy
    Ana Rosario Cueto Gomez (Universidad Autonoma de Madrid (ES))

    Presentation of the ATLAS Run 3 publication:
    https://arxiv.org/pdf/2606.04855

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  43. 30. Quantum correlations at the LHC
    Sergio Rodríguez Benítez (Instituto de Física Teórica IFT-UAM/CSIC)

    The ATLAS and CMS Collaborations have measured the entanglement between top quarks at the LHC. We use a fast detector simulation to investigate the feasibility of measuring quantum correlations beyond entanglement.

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  44. 38. Quantum correlations at the LHC (15'+5')
    Sergio Rodríguez Benítez (Instituto de Física Teórica IFT-UAM/CSIC)
  45. 17. Recent studies on rare $b\rightarrow s\ell\ell$ transitions at LHCb
    Felipe Luan Souza De Almeida (University of Barcelona (ES))

    The quark-level transitions of a beauty quark into a strange quark, such as $b\rightarrow s\ell\ell$, are flavour-changing neutral current (FCNC) processes, highly suppressed in the Standard Model (SM), and provide powerful indirect probes of physics beyond the SM. In recent years, measurements of these transitions have revealed intriguing tensions with SM predictions, including suppressed...

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  46. 10. Search for dark matter produced in association with top quarks
    Alicia Calderon Tazon (Universidad de Cantabria and CSIC (ES)), Jónatan Piedra (IFCA (Universidad de Cantabria - CSIC))

    In this talk the latest CMS results regarding a search for dark matter produced in association with top quarks are presented, together with an update about the current CMS effort with Run 3 data. The aforementioned results use the Run 2 data collected with the CMS detector at the LHC from proton-proton collisions at a center-of-mass energy of 13 TeV, corresponding to 138 fb−1 of integrated...

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  47. 15. Search for new physics in high energy dilepton final states with CMS detector
    Dr Begoña De La Cruz (CIEMAT (Madrid, ES))

    Searches for beyond standard model effects in high energy dilepton final states with the CMS detector will be presented, using data taken during Run2 (sqrt(s)=13 TeV) and Run 3 (sqrt(s)=13.6 TeV) periods. The analyses results are interpreted in the context of new massive resonances (W'), of Higgs compositeness scenarios and place stringent constraints on electroweak oblique parameters, W and...

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  48. 25. Search for the production of a Higgs boson in association with a single top quark and nd combined measurement of tH productionin at s√=13 TeV with the ATLAS detector
    Carlos Escobar Ibañez (Instituto de Física Corpuscular (IFIC), CSIC‐UV, Spain)

    The production of a Higgs boson in association with a single top quark (tH) provides a unique probe of the Higgs-top Yukawa coupling due to the interference between diagrams involving the Higgs coupling to the top quark and to vector bosons. As a result, this process is particularly sensitive to both the magnitude and the sign of the top Yukawa coupling, making it a powerful test of the...

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  49. 13. Searches for long-lived particles at LHCb with BuSca
    Jiahui Zhuo (Univ. of Valencia and CSIC (ES))

    BuSca (Buffer Scanner) is a real-time data monitoring and analysis framework designed to guide searches for new physics at the LHCb experiment at CERN, operating prior to any trigger decision. By accessing the full proton–proton collision rate of 30 MHz, it enables the exploration of previously inaccessible regions of phase space. Long-lived particle tracks are reconstructed and analysed in...

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  50. 26. Session 3
  51. 12. Spin-correlation in the Higgs decay to W bosons at CMS
    Sergio Blanco Fernandez (Universidad de Cantabria and CSIC (ES))

    In the context of a growing interest in quantum observables at collider experiments, this study presents the first experimental measurement of the polarization of W bosons in the Higgs boson decay. The Higgs boson, being a scalar particle, provides a unique opportunity, since its decay kinematic structure can be described by a small set of free parameters that are experimentally accessible at...

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  52. 8. Studies of track reconstruction performance in the ATLAS Event Filter for the HL-LHC
    Marco Aparo (Institut de Física d’Altes Energies (IFAE))

    The instantaneous luminosity at the High-Luminosity LHC (HL-LHC) will reach unprecedented levels, boosting the physics reach at the LHC. To cope with the resulting challenging pile-up condition and fully exploit the new high-granularity Inner Tracker (ITk), a major upgrade of the ATLAS Trigger and Data Acquisition (TDAQ) system is ongoing, with track reconstruction in the Event Filter being a...

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  53. 21. Testing CP-odd Higgs bosons via the hZ channel at the LHC
    Sven Heinemeyer (CSIC (Madrid, ES))

    ATLAS and CMS are measuring the Higgs production channel $pp \to hZ$, where $h$ is the Higgs boson discovered at the LHC. We analyze contributions of a CP-odd Higgs boson to this process via $gg \to A \to Zh$. This is done for $m_A = 95$ GeV, for Higgs bosons describing the $\gamma\gamma$ excesses observed at the LHC. We also analyze the more general scenario with $m_A \ge 200$ GeV and find...

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  54. 31. The Future HL-LHC Computing Model
    Antonio Perez-Calero Yzquierdo (Centro de Investigaciones Energéticas Medioambientales y Tecnológicas)

    LHC omputing talk at the RedKLHC workshop. The Future HL-LHC Computing Model

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  55. 16. The future of theoretical predictions on a quantum computer
    German Rodrigo (IFIC UV-CSIC)

    We discuss the perspectives for reaching better and faster theoretical predictions for the HL-LHC and future colliders by leveraging quantum computing methodologies able to circunvent the current computational barriers.

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  56. 9. Top physics at CMS
    Barbara Alvarez Gonzalez (Universidad de Oviedo (ES))

    This presentation will provide an overview of recent top quark physics results from the CMS Collaboration using Run 2 and Run 3 data, as well as the prospects for forthcoming results in the near future.

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  57. 19. Track and Vertex Reconstruction with the ATLAS Inner Detector
    Salvador Marti I Garcia (IFIC-Valencia (UV/EG-CSIC))

    Charged-particle reconstruction is a fundamental part of the event reconstruction in modern multi-purpose high-energy physics detectors. This paper describes the algorithms used to reconstruct charged particles and primary vertices with the ATLAS Inner Detector. The most recent software configuration deployed for data-taking is described, and the performance obtained when this software is used...

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  58. 28. Track reconstruction in the LHCb Run 3 trigger system
    Lukas Calefice (Universitat de Barcelona / ICCUB)

    The LHCb experiment underwent an upgrade for Run 3 to operate a five times higher instantaneous luminosity. At the heart of this upgrade stands the move to a fully software-based trigger system that removed the bottlenecks from tight cuts in the hardware trigger for fully hadronic decays, and operates the first stage of the new high-level trigger at the full detector readout rate of 30MHz....

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  59. 29. Transformer Neural Networks for identification of hadronically decaying $\tau$-leptons in ATLAS
    Nadav Michael Tamir (Institut de Física d’Altes Energies (IFAE))

    Hadronically decaying τ-leptons (τ's) are a key experimental signature at the LHC, contributing to a wide range of Standard Model (SM) measurements and Beyond the SM searches. Reconstruction and identification ("tagging") of τ's is challenging due to substantial QCD contamination, and accurate τ-tagging is hence crucial in maximizing the potential sensitivity of physics analyses. This talk...

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