Conveners
LHC
- Carlos Sandoval Usme (Universidad Nacional de Colombia)
LHC
- Gabriela Alejandra Navarro (Universidad Antonio Narino (CO))
LHC
- Cesar Rendon Hinestroza (Universidad de Antioquia (CO))
LHC
- Jose Ruiz (Universidad de Antioquia (CO))
LHC
- Cesar Rendon Hinestroza (Universidad de Antioquia (CO))
The Two Higgs Doublet Model (2HDM) is one of the simplest and best motivated extensions of the Standard Model (SM), which expands the scalar sector. By introducing a second Higgs doublet, it provides new sources of CP violation that are relevant for baryogenesis and potential explanations for flavor anomalies observed in B-meson decays. In this model, the Yukawa couplings scale with the...
This study presents projection results for the search of non-resonant Higgs boson pair production via vector-boson fusion (VBF) in the boosted $HH \to b\bar{b}b\bar{b}$ final state, using the upgraded ATLAS detector at the High Luminosity LHC (HL-LHC). The analysis extends the latest Run 2 results obtained with 140 fb$^{-1}$ of proton-proton collisions at $\sqrt{s}=13$ TeV to HL-LHC conditions...
We perform a feasibility study to probe dark matter (DM) production at the LHC within a $U(1)_L$ scotogenic model. The study is conducted using the Markov Chain Monte Carlo numerical method, considering the viable parameter space of the model allowed by experimental constraints such as neutrino oscillation data, the Higgs to invisible branching fraction, and DM observables. The production of...
Luminosity is a precision measurement, for the CMS experiment. During the Run 3, the uncertainty expected in the luminosity for each year is expected to be $\lesssim 1\%$. However, with the detector aging, some issues with the electronics readout may occur. For luminometers as PLT with redundant measurements, this issues may not affect strongly the central measurement of the luminosity, but...
Búsquedas de física más allá del modelo estándar en el LHC usan de manera frecuente diversos observables para determinar la presencia de señales asociadas a la producción de nuevas partículas. Dentro de estos observables es común encontrar distribuciones de masa reconstruidas, usando las partículas que se producen en las colisiones, en las cuales se esperan encontrar discrepancias en las...
This project, carried out within the ATLAS collaboration, focused on jet substructure studies using the Lund jet plane. Lund plane variables were implemented and used to train graph-based machine learning models for tagging hadronically decaying $W$ bosons and $top$ quarks. The performance of these taggers was systematically evaluated using different Monte Carlo event generators, with...
Jet Classification in high-energy physics is essential for probing fundamental interactions and for searches beyond the Standard Model. In this work, we introduce the Ensemble Model (EM) combining ResNet50 and InceptionV3 architectures for jet tagging, where jets are represented as two-dimensional histograms in the (η, ɸ) plane. This ensemble approach leverages complementary feature extraction...
Este estudio se centra en el desarrollo y aplicación de un algoritmo de agrupación de jets orientado a mejorar la reconstrucción del proceso
𝑝𝑝→𝑍′→𝑏𝑏ˉ en un modelo simplificado que extiende el Modelo Estándar mediante una simetría gauge adicional 𝑈(1)B, asociada al número bariónico calibrado. El objetivo principal es optimizar la identificación experimental del bosón 𝑍′ en detectores como...
The MUonE experiment is designed to extract the hadronic contribution to the electromagnetic coupling in the spacelike region $\Delta \alpha_{had}(t)$ from elastic $e\mu$ scattering. The leading-order hadronic vacuum polarization contribution to the muon $g−2$, $a^{HVP;LO}_{μ}$, can then be obtained from a weighted integral over $\Delta \alpha_{had}(t)$. This, however, requires knowledge of...
The Standard Model (SM) remains the most successful framework for describing particle interactions, yet it leaves key questions unresolved, including possible Lepton Flavor Universality (LFU) violation. Many proposed extensions of the SM predict new particles that couple preferentially to tau leptons, such as S1 and U1 leptoquarks, $ Z'_{B-L}$ bosons, and Type-II Two-Higgs-Doublet Models....
