NNV section for (astro)particle physics fall meeting

Session

Parallel Sessions (III)

3 Nov 2023, 15:25

de Werelt (Lunteren)

Conveners

Parallel Sessions (III): Session 3B - Room Fire 1

• Jacco de Vries

Parallel Sessions (III): Session 3A - Room Air

• Suzanne Klaver

Parallel Sessions (III): Session 3C - Room Fire 2

• Lydia Brenner

27. Fragmentation of charged-particle jets in pp collisions with ALICE

Gijs van Weelden

03/11/2023, 15:25

In high energy pp collisions, quarks and gluons can scatter as free particles, after which they will radiate away their energy via gluon Bremsstrahlung and quark-antiquark pair production, before hadronising back into bound states. The resulting sprays of energetic particles can be reconstructed as jets and function as probes for studying the strong interaction. The momentum distribution of...

33. Simulation of high-time-resolution silicon LGAD sensors with Allpix2

Robin Kan

03/11/2023, 15:25

Once the Large Hadron Collider (LHC) enters the high-luminosity phase, the number of proton-proton interactions will increase by an estimated factor of 3, which calls for a detector with very precise timing measurements to distinguish between collisions in time, as well as in space. To that end, the ATLAS detector will be upgraded with a High Granularity Timing Detector (HGTD) consisting of...

24. The Eyes of LISA

Timesh Mistry (Nikhef)

03/11/2023, 15:25

The Dutch contribution to the Laser Interferometer Space Antenna (LISA) covers both hardware and data analysis. Focusing on the hardware, the Netherlands will deliver 'The Eyes of LISA', known as the Quadrant Photo-Receivers (QPRs), made up of segmented InGaAs photodiodes with read-out electronics in an ultra-stable housing. Furthermore, The Netherlands is developing the Point Ahead Alignment...

32. First results from the Timepix4 Telescope

Kevin Heijhoff

03/11/2023, 15:45

A beam telescope based on the recently developed Timepix4 ASIC was built in order to perform tests of synchronous multiple-detector readout and track reconstruction with fast timing capability. The Timepix4 is a readout ASIC for hybrid pixel detectors that is designed to record both the time of arrival (ToA) and the time over threshold (ToT) for each discriminated signal. It has a 448 × 512...

28. Probing the width of the Higgs boson through offshell decays

Zef Wolffs

03/11/2023, 15:45

Since its discovery just over ten years ago we have learned a lot about the Higgs boson. However, some of its fundamental properties have yet to be confirmed experimentally. One such property is its decay width, or equivalently its lifetime. While it was initially never thought that measurements of the Higgs width could actually be made at the Large Hadron Collider (LHC) due to the detector...

25. TCAD Simulations on Monolithic Pixel Sensors: Improving Timing Performance for ALICE at LHC

Mariia Selina

03/11/2023, 15:45

During Long Shutdown 4 of the Large Hadron Collider (LHC), ALICE will be replaced by a completely new detector. It will offer unique insights into thermal dielectron production and heavy flavor probes in the quark-gluon plasma. This upgrade involves positioning the inner detector layer 5 mm from the interaction point, minimising scatterings, and enabling large-area curved sensors with the...

31. Advanced Machine Learning techniques at the service of identifying boosted Higgs-boson decays to heavy-flavours

Dr Geoffrey Gilles

03/11/2023, 16:05

The search for boosted Higgs-boson decays to heavy-flavoured quarks constitutes a central aspect of the physics programme of the ATLAS experiment at the Large Hadron Collider (LHC). A high-performance algorithm for tagging such Higgs boson decays can play a crucial role in improving the sensitivity of searches for new resonances in Beyond the Standard Model scenarios or in the precise...

26. Commissioning of the NEXT mass separator and spectrometer

Briain Hartigan (university of Groningen)

03/11/2023, 16:05

Soon to be located in the North hall of PARTREC, Groningen, the NEXT experiment intends to produce Neutron-rich EXotic heavy nuclei in multi-nucleon Transfer reactions. By measuring the masses of these exotic nuclei to high precision, their internal nuclear structure can be probed. These masses can also be used as input data for nucleosynthesis models.
Once produced, the transfer products...

35. Transformers for Particle Track Reconstruction and Hit Clustering

Nadezhda Dobreva (Institute for Computing and Information Sciences, Radboud University, Nijmegen)

03/11/2023, 16:05

Track reconstruction is a crucial part of High Energy Physics (HEP) experiments. Traditional methods for the task scale poorly, making machine learning and deep learning appealing alternatives. Following the success of transformers in the field of language processing, we investigate the feasibility of training a transformer to translate detector signals into track parameters. We study and...