ATLAS experiment (2006-2013):
As part of my Ph.D. dissertation, I measured the top quark pair production cross-section using multivariate technique with the ATLAS data. The study began with prospective of tt ̅ cross section measurement for 10 TeV, summarized in internal ATLAS note ATL-PHYS-INT-2010-003. Then I contributed to the first paper of top quark observation at ATLAS, “EPJC 71 (2011) 1577”, by studying the fake lepton background as presented in ATLAS notes ATL-COM-PHYS-2011-144 and ATL-PHYS-INT-2010-139. With data corresponding to 35 pb-1 of total integrated luminosity taken in 2010, I measured the tt ̅ cross section in the lepton (e, µ)+jets channel. It was the most precise measurement without b-tagging at that time. It was presented on Winter 2011 conferences and published in “Phys. Lett. B711 (2012) 244-263”.
I performed the first analysis at LHC on measurement of the top quark pair production cross-section with additional jets (tt ̅+jets) using the ATLAS data collected during 2010-2011. This measurement is an important test of perturbative QCD and helped to validate the QCD predictions as implemented in Monte Carlo generators. The tt ̅+jets events form a background to many important signatures for possible new physics (like supersymmetry, heavy charged Higgs, searches for 4th generation quarks). The results of this analysis were summarized in ATLAS public note ATLAS-CONF-2012-083 and reported at various conferences including ICHEP 2012.
I also contributed to the first measurement of the tt ̅ cross section in the single-lepton channel with ATLAS at 8 TeV using kinematic fits with b-tagging. The results were summarized in ATLAS public note ATLAS-CONF-2012-149 and presented at the HCP 2012 conference.
I proposed and led a project aimed at study of radiation hardness of PIN and VCSEL diodes to be used in the opto-link boards in the Pixel detector for SLHC Upgrade. I invented a new method to avoid the optical fiber and connector degradation effect due to radiation in the test environment.
RICH, STAR detector :
In 2013 I joined the STAR collaboration at RHIC as “detector expert on-call”, where I was involved in Heavy Flavor Physics group and leading an extensive research and development study for the eSTAR upgrade. I have designed Forward Tracker Silicon sensors (FTS) with new and innovative geometrical design include advance semiconductor simulation with SILVACO. I was also playing a leading role in the design and implementation of IST Slow control and calibration during the commissioning phase.
Muon g-2 experiment :
I was leading the “Optical pumped 3He NMR pulsed magnetometer” R&D and prototyping. Precise measurement of magnetic field is a key to reduce the systematic error and most likely replace water-based absolute calibration probe in Muon g-2 experiment. I have invented and proposed a portable 3He probe head and made the first prototype and tests in low intensity field. I have also trained and advised two master students and one summer student in g-2 experiment. I am author and contributor to the first g-2 muon paper: “Measurement of the Positive Muon Anomalous Magnetic Moment to 0.46 ppm” B. Abi(Oxford U.) et al. (Apr 7, 2021) Published in: Phys.Rev.Lett. 126 (2021) 14, 141801
LSST experiment :
While I started DUNE experiment, I have been also involved in the LSST experiment part time, where I designed and made a test-stand for study and measurement of the PTP time synchronization precision.
DUNE experiment (2016- present):
I led ad proposed TDAQ Architecture Variant Study after 35T and led the design and prototyping of 4th generation of RCE in collaboration with SLAC for DUNE. Currently, I am leading the design and prototyping of the FELIX board for DUNE collaboration. I am the FELIX hardware sub-group package manager in UK DUNE project. I am also leading the detector’s electronics readout performance and noise and simulation for MC.