I am a Reader in Physics at the University of Liverpool.

My area of physics interest is in High Energy Elementary Particle Physics. For many years I worked on experiments involving the use of Polarised Proton Targets. I wrote my PhD thesis on the development of a polarised proton target and the study of its radiation damage properties. I then worked for several years on experiments at the Daresbury Laboratory in Cheshire, developing polarised targets for use in the photoproduction of pseudoscalar mesons.

I then moved on to experiments at the CERN laboratory near Geneva in Switzerland where I was a member of the European Muon Collaboration (EMC). As part of this experimental programme, we developed a polarised proton target which was the largest in the world by several orders of magnitude. By studying deep inelastic muon scattering from this target we were able to make detailed studies of the spin structure of the nucleon. This resulted in the surprising discovery that the 3 valence quarks in the nucleon are responsible for only a small fraction of the nucleoun's spin.The paper giving this result became one of the most cited experimental publications and spawned a large number of follow-up experiments which are still continuing 15 years later.

I then moved on to the study of CP violation. I worked for several years on the CPLEAR experiment at CERN, studying CP, T and CPT symmetries in the decay of neutral kaons, where I was co-ordinator of the group studying the decay of neutral kaons into a pair of charged pions. This experiment made a great many precise measurements which produced results on CP, T and CPT violation parameters which are the most accurate in the world.

Most recently I have started work on the BaBar experiment at the SLAC laboratory near San Francisco in California. This experiment is studying CP violation in the decay of neutral B mesons. This should provide stringent tests of the predictions of the source of CP violation made by the Standard Model of Elementary Particle Physics. I am currently supervising two PhD students who are working respectively on the study of mixing in neutral B-meson decays and on the study of the decay of neutral B mesons to Jpsi Omega.

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