MultiHiggs Physics Currently focused on the first search for BSM effects which could enhance triple-Higgs production.
Searching for BSM using dataset topology. This project is an entirely new approach to LHC new-physics searches, exploiting for the first time the relationships between collider events, to discriminate between SM and beyond Standard Model (BSM) physics. A graph network is built in which individual events appear as nodes, with edges between events reflecting their similarity in kinematic space. Properties of the graph nodes describe the dataset topology, providing discrimination between BSM and SM processes based more on rarity and variability in the signal than a specific models kinematics. Considering several definitions of similarity provides a plethora of event variables that can be used in addition to existing kinematic information to achieve good sensitivity in a prototype electroweak supersymmetry search. Possible new physics searches benefitting from this approach, and the potential to attain model-independent sensitivity to new physics are currently being explored.
Part of a joint grant with Adelaide "Optimising the search for the next discovery in particle physics"
Searching for electroweak supersymmetry. This project was 2/3 of my PhD, where I was the main analyser in searches for electroweak supersymmetry (SUSY) in 2 lepton final states, primarily targetting chargino pair production decaying via W bosons, but also searching for direct slepton production and chargino production decaying via sleptons, placing world-leading limits at the time using the full ATLAS Run-2 dataset. I am also involved in future developments aiming to close the gap at low mass-splittings, having performed many initial studies on utilising machine learning (BDTs) for SUSY/SM classification, and using flavour symmetry to improve the data-driven standard model background estimate.
Detecting undetectable particles: missing transverse momentum (MET) I am the incoming MET Trigger Signature Co-ordinator, and I have been the co-leader of the 'missing transverse momentum and pileup jet tagging' group at ATLAS. We work on developing ATLAS's ability to infer the presence of otherwise undetectable particles, like neutrinos and dark matter, which is a crucial part of many searches and measurements at ATLAS. During my PhD I worked on calcuting uncertaintes on the missing transverse momentum reconstruction, which are used ATLAS-wide. Current work includes Machine learning approaches to improve MET reconstruction and define new MET-based variables to better discriminate between BSM and SM physics in searches, and devising new MET Calibration methods.
Data-driven searches for unexpected asymmetries The first paper in this theme searched for violation of lepton charge-flavour symmetries in emu events a unique data-data comparison with sensitivity to many BSM models, such as R-Parity violating supersymmetry (RPV-SUSY) and scalar leptoquarks.
"Global fits and future collider studies with GAMBIT I am a new member of the GAMBIT community. My latest research theme is to contribute to global fits of existing results in full BSM models, in order to establish which models of BSM parameter space are most favoured and should be targetted in future searches. I aim to interpret these also in the context of future collider sensitivity.
EW SUSY Production at the LHC
Missing transverse momentum reconstruction at ATLAS
QCD and the search for exotic physics
Searching for new physics with emu asymmetry at the ATLAS detector
Does SUSY have friends? A new approach for LHC analysis
ATLAS Collaboration major internal talks
Exotics group overview
ATLAS Exotics Workshop 2022, Online. 09/22.
`What can Exotics learn from SUSY?', 'Big Friendly Graphs for searches'
ATLAS Hadronic Calibration Workshop 2022, Online. 09/22.
Local Organising Committee. Chairing session on MET.
ATLAS UK annual meeting 2022, Online. 01/22.
Chairing session on ATLAS reconstruction performance
ATLAS Collaboration Week October 2021, Online. 10/21.
Overview of work in the JetEtMiss group
ATLAS Exotics Workshop 2021, Online. 09/21.
`New and uncovered analyses in the Lepton+X subgroup'
ATLAS Hadronic Calibration Workshop 2020, Online. 09/20.
Chaired session on MET, talk on future MET systematics strategy.
ATLAS Physics and Performance Week 12/2019, Online. 10/12/19.
Overview of ongoing work in the MET and pileup jet tagging subgroup.
ATLAS Hadronic Calibration Workshop 2019, Tucson USA. 14/10/19.
Chaired session on MET, talk on MET group activities.
ATLAS UK joint SUSY/Exotics Meeting 2019, Cambridge UK. 11/04/19.
"Searching for new physics with emu asymmetry at the ATLAS detector"
ATLAS UK Annual Meeting 2019, London UK. 04/01/19.
"Electroweak SUSY Searches"
ATLAS Physics and Performance Week 09/2018, Online. 20/09/18.
Overview of ongoing work in the Exotics lepton+X subgroup.
ATLAS Hadronic Calibration Workshop 2018, Heidelberg Germany. 12/09/18.
"Introduction to MET and pileup jet tagging."
ATLAS Supersymmetry Workshop 2018, Stockholm Sweden. 23/05/18.
"Overview of the current Electroweak SUSY search programme"