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Ahmed Abdelmotteleb

About me

  • From Cairo, Egypt
  • Particle Physics Ph.D. student at the University of Warwick (LHCb Experiment - CERN)
  • Did my MPhys at the University of Manchester (2016-2020)
  • MPhys Project was with ATLAS (CERN). Tried to prove Majorana Neutrinos exist using Left-Right Symmetric Models (SM Extension/BSM) and simulations
  • Did some QA work with STAR group at Brookhaven National Lab (New York) for 6 months (search for Quark-Gluon Plasma using heavy ions)
  • Former Secretary, International Representative, and the Particle Physics Group representative of the Postgraduate Student-Staff Liaison Committee of the University of Warwick Physics Department (Oct 2020 - Oct 2021)
  • Former Secretary and Athena Swan representative of the Postgraduate Student-Staff Liaison Committee of the University of Warwick Physics Department (Oct 2021 - Oct 2022)
  • Former Secretary of the University of Manchester Nuclear & Particle Physics Society (UoM NPPS)
  • Short-distance sprinter (100m and 200m)
  • Manchester United FC fan

Ph.D. Project

Currently working with Dr. Mika VesterinenLink opens in a new window and Dr. Miguel Ramos Pernas to help make a precision measurement of the W boson mass using the 5 TeV 2017 dataset of the LHCb experiment at CERN.

In this research project, we try to examine the charged lepton transverse momentum spectrum in π‘Š β†’ πœ‡Ξ½ decays. We investigate the feasibility of background subtraction as a method for determining the π‘Š boson mass through measuring the differential cross-section in 𝑝𝑇 and Ξ·. The ultimate aim of the project would be to make the first measurement of the unfolded muon 𝑝𝑇 with sufficient precision. This would then allow for the precise measurement of the π‘Š boson mass.

The proof of principle on the W boson mass measurement at LHCb paper can be accessed hereLink opens in a new window.


  1. Why do we care about mW?
    • W boson is one of the key probes for new physics effects slightly deviating from the Standard Model.
    • The β€œGlobal electroweak fit” is sensitive to BSM physics, and the precision of the W boson mass is the bottleneck.
    • It allows us to probe further into the precision of mass measurements of the Higgs boson and the top quark.
    • At the precision that we are measuring mW, we are probing quantum loop corrections, including, possibly, loops from BSM.
  2. What is unique about this study?
    • We aim to contribute to one of the most precise measurements of mW.
    • We are experimenting with background subtraction as a new method for determining mW.
    • We are aiming for the first unfolded measurement of the muon 𝑝𝑇.
    • We are using the LHCb detector as a General-Purpose Detector.
    • Our measurement can be a significant contribution towards an LHC-wide average.
  3. How would your results compare to previous experiments?
    • We would measure the cross-section as a function of [pT,Ξ·] rather than just Ξ·.
    • We aim to bring down the uncertainty to O(10) MeV, compared to LEP (33 MeV), the 2020 PDG average of direct measurements (12 MeV), the latest ATLAS measurement (19 MeV), and the average of CDF and D0 (16 MeV).
    • Our unfolded measurement will allow theorists to use their models and try to fit mW without worrying about constraints from detector uncertainties.

Contact Details



Personal Website:

Office: PS004