Individual Listing

PHYSICS
University of California
Riverside, CA 92521

Ellison, John

Professor

College of Natural and Agricultural Sciences

Physics and Astronomy


Biography

John Ellison received his Ph.D. from Imperial College, London in 1987, and moved to UC Riverside in 1989 where he is now a Professor of Physics. Professor Ellison is an experimental high energy physicist and has worked in the areas of electroweak physics, B-meson physics, Supersymmetry, and charged particle tracking using silicon microstrip detectors.

Former Institution

 Imperial College, University of London

Degrees

BS Physics 1983

University of Southampton, UK

DIC High Energy Physics 1987

Imperial College, University of London

PhD Physics 1987

Imperial College, University of London

Awards

Department of Energy Outstanding Junior Investigator Award (1993-97)
SERC Fellowship 1987


Research Area

My research has concentrated on the areas of electroweak physics, B-meson physics, supersymmetry, and silicon tracking detectors. I have been active in the DØ Collaboration's measurements of electroweak boson pair production. These processes are particularly interesting since they probe the non-Abelian gauge boson trilinear couplings of the Standard Model (i.e. the WWγ and WWZ couplings). These processes are also sensitive to deviations from the tree-level Standard Model couplings, which may arise due to compositeness of the W and Z bosons, SUSY radiative loop corrections, or other non-SM phenomena. For a review see arXiv:hep-ph/9804322. I have also made many contributions to measurements of other properties of the W and Z bosons. More recently, I been involved in the search for CP violation in B_s-meson decays at DØ, see arXiv:hep-ex/0802.2255

Another aspect of my work has focussed on building the DØ Silicon Microstrip Tracker (SMT). I was co-leader of the project in the early R&D and construction phase, and I worked on the design, fabrication, and testing of the silicon microstrip sensors. These charged particle detectors have the capability of selecting events containing B-hadron decays by precisely measuring secondary vertices which, due to the B lifetime of 1.5 psec, are significantly detached from the primary proton-antiproton interaction vertex. This capability is crucial for the DØ top quark and B physics programs as well as for the search for the Higgs boson. The SMT is now installed in DŲ and is fully operational. For more information about the SMT and the DØ detector see arXiv:physics/1005.0801.

I am also working on the CMS experiment at CERN. CMS is one of several large experiments at the Large Hadron Collider at CERN which are seeking the answers to fundamental questions about our universe, such as: what is the origin of mass; why does matter dominate over antimatter in the universe; is nature supersymmetric; and what is dark matter made of? My current interest focuses on the search for supersymmetry using leptonic signatures. I am also working on the design of the CMS Tracker for the Super-LHC.

Publications

See my full list of over 350 publications.

DŲ Collaboration, "Measurement of the B_s⁰ Mixing Parameters from the Flavor-Tagged Decay B_s⁰ → J / Ψ φ ," Phys. Rev. Lett. 101, 241801 (2008), arXiv.org:0802.2255

DŲ Collaboration, "Lifetime Difference and CP-Violating Phase in the B_s⁰ System," Phys. Rev. Lett. 98, 121801 (2007), arXiv.org:hep-ex/0701012.

DŲ Collaboration, "Direct Limits on the B_s⁰ Oscillation Frequency," Phys. Rev. Lett. 97, 021802 (2006), arXiv.org:hep-ex/0603029.

DŲ Collaboration, "Measurement of the Lifetime Difference in the B_s System," Phys. Rev. Lett. 95, 171801 (2005), arXiv.org:hep-ex/0507084

DŲ Collaboration, "A Measurement of the Ratio of Inclusive Cross Sections p p → Zb / p p → Zj at √ s = 1.96 TeV," Phys. Rev. Lett. 94, 161801 (2005), arXiv.org:hep-ex/0410078.

DŲ Collaboration, "A Search for Wbb and WH Production in p p Collisions at √ s = 1.96 TeV," Phys. Rev. Lett. 94, 091802 (2005), arXiv.org:hep-ex/0410062.

DŲ Collaboration, "A precision measurement of the mass of the top quark," Nature 429, 638 (2004), arXiv.org:hep-ex/0406031

DŲ Collaboration, "Improved W Boson Mass Measurement with the DŲ Detector," Phys. Rev. D 66, 012001 (2002), arXiv.org:hep-ex/0204014

DŲ Collaboration, "Studies of WW and WZ Production and Limits on Anomalous WWgamma and WWZ Couplings," Phys. Rev. D 60 072002 (1999), arXiv.org:hep-ex/9905005

Report of the Working Group on Precision Measurements, Proceedings of Physics at Run II: QCD and Weak Boson Physics Workshop, Batavia, Illinois, 4-6 March 1999, FERMILAB-CONF-01-282-E.

J. Ellison and J. Wudka,"Study of Trilinear Gauge Boson Couplings at the Tevatron Collider," 48, 33 (1998), arXiv.org:hep-ex/9804322.

DŲ Collaboration, "Limits on Anomalous WW γ and WWZ Couplings," Phys. Rev. D (Rapid Communications) 58, 031102 (1998), arXiv.org:hep-ex/9803017

DŲ Collaboration, "Studies of Gauge Boson Pair Production and Trilinear Couplings," Phys. Rev. D 56, 6742 (1997), arXiv.org:hep-ex/9704004

DŲ Collaboration, "Limits on Anomalous WW γ Couplings from p p → W γ + X Events at √ s = 1.8 TeV," Phys. Rev. Lett. 78, 3634 (1997), arXiv.org:hep-ex/9612002