Prof Steve Lloyd

Prof Steve Lloyd

Emeritus Professor of Experimental Particle Physics
School of Physics and Astronomy
Queen Mary, University of London
327 Mile End Road, London, E1 4NS

Telephone: 020 7882 6967
Room: G O Jones 231

Research Interests

I have been involved in the discovery of two of the five fundamental gauge bosons of the Standard Model of Particle Physics, the gluon and the Higgs Boson.

I work on the ATLAS Experiment studying proton-proton collisions at the Large Hadron Collider, LHC, at CERN Geneva, Switzerland. In July 2012 ATLAS found the elusive Higgs particle, required to explain particle masses, and hopes to find other exciting physics such as Supersymmetry. I am particularly interested in studying the top quark having spent half my career so far failing to find it at previous accelerators, PETRA and LEP. I am convenor of the ATLAS Software Infrastructure Team (SIT) and also work on documentation, The ATLAS Workbook.

I am particularly involved in the development of the 'Grid' - a massive distributed computer system necessary for the analysis of the vast amounts of data being produced by the LHC. I am Chair of the Collaboration Board of GridPP, a multi £M project to operate a UK Grid for Particle Physics.

I used to work on the OPAL Experiment at the LEP electron positron collider which studied the very highest energy collisions of electrons and positrons. These collisions produced Z bosons and pairs of W bosons, the mediators of the weak interactions. These studies led to extremely precise tests of the Standard Model of Particle Physics and showed that there are only 3 types of light neutrino and hence probably only 3 generations of quarks.

My ATLAS e-News profile, pictures from my Inaugural Lecture, with Sir Alan Sugar and at the Big Bang Breakfast.

I have co-authored two books on Experimental Particle Physics:

Formatted publication list.

ORCID: 0000-0002-5073-2264

Particle Physics Talks

Some recent Particle Physics talks:

Grid Talks

Some recent Grid talks:
  • GridPP
    PPAP Community Meeting, RAL, 21 July 2014.
  • The Grid
    OCR Physics Conference, Royal College of Pathologists, London, 28 June 2012.


I used to teach:

I was the winner of the Bob Jones Golden Corduroy Jacket Award for Teaching Excellence for 2011/12.


I am Head of the School of Physics and Astronomy.

Selected publications

Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
Aad, Georges et al.
Phys.Lett., Volume B716, page 1-29. Publication year: 2012

DOI: 10.1016/j.physletb.2012.08.020

Measurement of the mass and width of the $W$ boson
Abbiendi, G. et al.
Eur.Phys.J., Volume C45, page 307-335. Publication year: 2006

DOI: 10.1140/epjc/s2005-02440-5

Precise determination of the Z resonance parameters at LEP: 'Zedometry'
Abbiendi, G. et al.
Eur.Phys.J., Volume C19, page 587-651. Publication year: 2001

DOI: 10.1007/s100520100627

Evidence for Planar Events in e+ e- Annihilation at High-Energies
Brandelik, R. et al.
Phys.Lett., Volume 86B, page 243-249. Publication year: 1979

DOI: 10.1016/0370-2693(79)90830-X

How to deal with petabytes of data: the LHC Grid project
Britton, D. et al.
Rept.Prog.Phys., Volume 77, page 065902. Publication year: 2014

DOI: 10.1088/0034-4885/77/6/065902