Particle Physics Post-graduate: Dirac Equation and Matrix Element Calculations
Despite the huge success of the Standard Model (SM) of
particle physics in describing nature, it has several short
comings. In particular, it offers no explanation for
cosmological observations such as the matter-antimatter
asymmetry of the universe or the nature of Dark Matter and
Dark Energy. These fundamental issues motivate my research,
which focuses on searches for new physics beyond the SM.
I gained a Ph.D. in experimental particle physics
from the University of Manchester on
the H1 Experiment
at DESY. Currently, I am a
Lecturer at the University of Liverpool, working
on the ATLAS and FASER
Experiments at CERN.
ATLAS 2006 - Current
My early ATLAS research focused on searching for the much-sought Higgs boson. I used the first LHC
data to search for a heavy SM Higgs boson not accessible at previous colliders, significantly
constraining the allowed mass range. Following this, I made a significant contribution to the
first LHC search for the dominant low-mass H → bb decay using the 7 TeV ATLAS data.
Since the Higgs discovery, I have focused on searching for physics beyond the SM (BSM). I initiated
and led searches for additional BSM Higgs bosons, predicted in many models, in the lepton + jet final
state using the 8 TeV ATLAS data. I then spearheaded the first run-2 ATLAS Higgs searches as ATLAS
BSM Higgs subgroup convener, probing several BSM models.
I have subsequently utilised the SM Higgs boson as a new-physics probe. With the early 13 TeV data,
I played a major role in the novel search for dark matter recoiling against a Higgs boson decaying to
two b-jets. As ATLAS Exotics Diboson and Multilepton (DBL) subgroup convener, I oversaw the searches for new
diboson resonances with the 2015+16 data, probing uncharted masses. I led the search for Higgs pair
production in the HH → bbττ decay, establishing the world's best limit on the SM
non-resonant di-Higgs cross section
Since October 2018, I lead the ATLAS BSM search programme as Exotics Working group convener,
overseeing over 500 international physicists. In parallel, I study the Higgs mechanism by
continuing to search for the as-yet unobserved HH production, which provides a unique probe
of the Higgs potential and hence the underlying mechanism for mass generation.
Besides physics analysis I have contributed significantly to ATLAS track reconstruction software and
the identification and calibration of jets originating from b-quarks. I am currently ramping up my
involvement in the silicon tracker replacement for the High-Luminosity LHC upgrade.
FASER2020 - Current
Liverpool joined the
FASER experiment to search for dark photons down-stream of
ATLAS in summer 2020. We are currently working on the
simulation of the FASER calorimeter.
LUX/LUX-Zeplin 2017 - 2020
My LUX/LZ focus was on using EFTs to extend the classic spin-(in)depndent
results to probe more complext dark sectors and allow direct detection results to be
better compared with colliders. I contributed to the LUX run-4 EFT analysis. On LUX-Zeplin,
I originated the analysis software framework and provided support for the UK Data
Centre to prepare for first data.