7th ComHEP: Colombian Meeting on High Energy Physics

Session

LHC results

1 Dec 2022, 14:00

Conveners

LHC results

• Gabriela Alejandra Navarro (Universidad Antonio Narino (CO))
• Carlos Sandoval Usme (Universidad Nacional de Colombia)

69. Jet physics at the LHC

Reina Coromoto Camacho Toro (LPNHE-Paris CNRS/IN2P3)

01/12/2022, 14:00

71. BSM Physics at the LHC, status and perspectives

Carlos Andres Florez Bustos (Universidad de los Andes (CO))

01/12/2022, 14:45

1. Quarkophobic W' for LHC searches

Jose Ruiz (Universidad de Antioquia (CO))

01/12/2022, 16:00

LHC-2

Regular Talk (15'+5')

We consider a simplified model where a W' boson is added to the standard model with negligible couplings to quarks, but generic couplings to leptons and electroweak bosons. We study the implications of such a model for LHC searches. Consequently, we propose an LHC search through the vector boson fusion topology which would have sensitivity for such a new particle with the current proton-proton...

29. Searches of new physics in the final state $B\tau \nu$ in $pp$ collisions

Tomas Atehortua Garces (Universidad de Antioquia (CO))

01/12/2022, 16:20

Beyond the standard model

Regular Talk (15'+5')

The $R_{D^{(\ast )}}$ anomaly is one of the most intriguing experimental results in particle physics. Experiments as BaBar, Belle and LHCb have measured a consistent tension with the standard model. In this work we study a consequence of different solutions to this tension as a sequential ${\mathrm{W}}^{\prime }$ boson, EFT and leptoquark. Such models, are not only able to explain the $R_{D^{(\ast )}}$...

50. Use of the Lund plane technique for the identification of W bosons in ATLAS experiment

Rafael Andrei Vinasco Soler (Universidad Nacional de Colombia (CO))

01/12/2022, 16:40

LHC-1

Regular Talk (15'+5')

Particle tagger methods are a powerful tool to filter unwanted data and improve the final results of the experiment. In this case, the performance of different tagger methods of W bosons in collision events of the ATLAS experiment will be studied, taking special attention to the methods based on the so-called Lund Jet Plane, which according to preliminary results presents a better performance...

26. Feasibility studies for searches enhanced by machine learning methods of leptoquarks with preferencial couplings to third generation fermions at the LHC.

Cristian Rodriguez (Universidad de los Andes)

01/12/2022, 17:00

LHC-2

Regular Talk (15'+5')

In recent years, the observations reported by LHCb, Babar, and Belle experiments of the apparent anomalies in B-meson decays, together with the possible anomaly on the magnetic angular momentum of muons reported by the Muon $g-2$ experiment at Fermilab, indicate that, perhaps, lepton flavour universality is violated in the SM, in turn being a window to search new physics.

Of the new models...

33. Machine learning approach for vector boson fusion identification

Mr Anderson Alexis Ruales Barbosa (Universidad de Antioquia (CO))

01/12/2022, 17:20

LHC-1

Regular Talk (15'+5')

The strength of the Higgs boson's coupling with other fermions and bosons is extensively studied during the first two LHC runs. In this work, the production of the Higgs boson, namely, Vector Boson Fusion (VBF) is studied. VBF is the process of two quarks, each of which emits a vector boson, W or Z boson, which then merge to create a Higgs boson. Machine learning (ML) models are built to...

40. Boosted Higgs boson in association with a vector boson

Juan Manuel Moreno Perez (Universidad Nacional de Colombia (CO))

01/12/2022, 17:40

LHC-1

Short Talk (5')

This work studies the improvement that could be obtained by applying machine learning techniques to an ongoing event selection.

48. Calibration of the Jet Vertex Tagger algorithm in the ATLAS detector

Ms Laura Juliana Caviedes Betancourt (Universidad Nacional de Colombia (CO))

01/12/2022, 17:45

LHC-2

Short Talk (5')

This work uses jet-vertex tagger (JVT) and forward jet-vertex-tagger (fJVT) which discriminate pile-up events from high scattering processes coming from the first vertex and thus calibrate these algorithms by determining the scaling factors of their efficiency with their corresponding uncertainties using data from the ATLAS experiment.

31. COFFEA: Columnar Object Framework For Effective Analysis

Daniel Ocampo Henao (Universidad de Antioquia (CO))

01/12/2022, 17:50

Theory - Phenomenology

Regular Talk (15'+5')

Columnar analysis is a paradigm that describes the way the user writes the analysis application that is best described in contrast to the the traditional paradigm in high-energy particle physics (HEP) of using an event loop. Coffea is a prototype package for pulling together all the typical needs of a high-energy collider physics (HEP) analysis. In this talk I will provide an introduction to...