Conveners
Experimental methods
- Philip Coleman Harris (Massachusetts Inst. of Technology (US))
The CALICE collaboration is developing high-granular calorimeters for the application of particle flow reconstruction to calorimetry in future linear collider experiments. An engineering prototype for an analogue hadron calorimeter (AHCAL) was assembled by the CALICE collaboration. Events measured by the AHCAL include 5-dimensional information in 22k channels: the 3D location, energy and...
The addition of multiple, nearly simultaneous proton proton collisions to hard-scatter collisions (in-time pileup) is a significant challenge for most physics analyses at the LHC. Many techniques have been proposed to mitigate the impact of pileup on jets and other reconstructed objects. This study investigates the application of convolutional neural networks to pileup mitigation by treating...
Secondary vertex finding is a crucial task for identifying jets containing heavy flavor hadron decays.
Bottom jets in particular have a very distinctive topology of 𝑏→𝑐→𝑠 decay which gives rise to two secondary vertices with high invariant mass and several associated charged tracks.
Existing secondary vertex finding algorithms search for intersecting particle tracks, and group them into...
The high collision energy and luminosity of the LHC allow to study jets and hadronically-decaying tau leptons at extreme energies with the ATLAS detector. These signatures lead to topologies with charged particles with an angular separation smaller than the size of the ATLAS Inner Detector sensitive elements and consequently to a reduced track reconstruction efficiency. In order to regain part...
Canonical particle flow algorithm tries to estimate neutral energy deposition in calorimeter by first performing a matching between calorimeter deposits and track
direction and subsequently subtracting the track momenta from the matched cluster energy deposition.
We propose a Deep Learning based method
for estimating the energy fraction of individual components for each cell of the...
Reconstructing the jet transverse momentum ($p_{\rm T}$) is a challenging task, particularly in heavy-ion collisions due to the large fluctuating background from the underlying event. While ALICE's standard area-based method effectively corrects for the average background, it does not account for region-to-region fluctuations. These residual fluctuations are handled in an unfolding procedure...
