John Ellison
Professor of Physics
Ph.D. 1987, Imperial College, London
Experimental High Energy Physics
E-mail: john.ellison@ucr.edu
Phone: (951) 827-4301
Fax: (951) 827-3345
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Professor Ellison has been a leader 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 WW
and WWZ couplings). These
processes are also sensistive 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. Acting as Electroweak Physics convener
in the DØ Collaboration, Professor Ellison has also made
contributions to measurements of many other properties of the W and
Z bosons.
Prof. Ellison has worked on the design, fabrication, and testing of
silicon microstrip detectors for the DØ Silicon Microstrip
Tracker (SMT). 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, is
significantly detached from the primary proton-antiproton
interaction vertex. This capability is crucial for the
DØ top quark and B physics program as well as the search
for the Higgs boson. The SMT is now installed in DØ and is
fully operational.
Selected Publications
DØ Collaboration, First Direct Two-Sided Bound on the Bs0 Oscillation Frequency, submitted to Phys. Rev. Lett. (2006), hep-ex/0603029.
DØ Collaboration, Measurement of the Lifetime Difference in the Bs System,
Phys. Rev. Lett. 95, 171801, (2005).
DØ Collaboration, A Measurement of the Ratio of Inclusive Cross Sections p pbar --> Zb / pbar --> Zj at sqrt(s) = 1.96$ TeV,
Phys. Rev. Lett. 94, 161801, (2005).
DØ Collaboration, A Search for Wbbbar and WH Production in p pbar Collisions at sqrt(s) = 1.96$ TeV,
Phys. Rev. Lett. 94, 091802, (2005).
DØ Collaboration, Improved Measurement of the Top Quark Mass,
Nature 429, 638 (2004).
J. Ellison, Top Quark Physics Results from DØ, Proceedings of the Lake Louise Winter Institute,
Lake Louise, Alberta, Canada, 15-21 February 2004, Worl Scientific Publishing (2005), A. Astbury, B.A. Campbell, F.C. Khanna, and M.G. Vincter Eds., pp.160--164.
DØ Collaboration,
Improved W Boson Mass Measurement with the DØ Detector,
Phys. Rev. D 66, 012001 (2002).
J. Ellison, The DØ Detector Upgrade and Physics Program, Proceedings of the 15th International Workshop on High Energy Physics and Quantum Field Theory, Tver, Russia, 14-20 September, 2000, Moscow State University Press (2001) M.N. Dubibib and V.I. Savrin (Eds.), hep-ex/0101048.
DØ Collaboration,
Studies of WW and WZ Production and Limits on Anomalous WWgamma and WWZ Couplings, Phys. Rev. D 60 072002 (1999).
J. Ellison, W and Z Properties at the Tevatron, Proceedings of the International Europhysics Conference on High Energy Physics, Tampere, Finland, 15-21 July, 1999, Institute of Physics (2000) K. Huito, H. Kurki-Suonio, and J. Maatampi (Eds.), hep-ex/9910037.
J. Ellison and J. Wudka,
Study of Trilinear Gauge Boson Couplings at the Tevatron Collider, Annual Review of Nuclear and Particle Science 48, 33 (1998).
DØ Collaboration, Limits on Anomalous WWgamma and WWZ Couplings,
Phys. Rev. D Rapid Communications 58 31102 (1998).
DØ Collaboration,
Studies of Gauge Boson Pair Production and Trilinear Couplings,
Phys. Rev. D 56, 6742 (1997).
DØ Collaboration,
Limits on Anomalous WWgamma Couplings from pbar --> W gamma + X Events at
sqrt(s) = 1.8 TeV,
Phys. Rev. Lett. 78, 3634 (1997).
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