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Senior Scientists

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Willis K. Sakumoto

  • Senior Scientist and Laboratory Engineer

PhD in Physics, Northwestern University, 1983

MS 318 Fermilab
(630) 840-8431
Fax: (630) 840-2968



Dr. Sakumoto received his BS in physics (1972) from the Illinois Institute of Technology and his PhD in physics (1983) from Northwestern University. He was a postdoctoral associate at the University of Rochester from 1984-1990, promoted to Senior Research Associate in 1990, and appointed Senior Laboratory Engineer and Senior Scientist in 2003. Dr. Sakumoto co-managed the production and installation of the CDF Run II end plug hadron calorimeter upgrade with senior scientists Howard Budd and Pawel de Barbaro (1992-1996). He has also served as co-convenor of CDF's Top/Electroweak Physics Group (2001-2003).

Research Overview

Dr. Sakumoto's research interest is in the field of experimental high-energy physics. His research interests are in the physics of W's, Z's and dileptons at CDF and in neutrino physics (CCFR/NuTeV). At CDF, Sakumoto is concurrently serving as a co-leader of the CDF Calorimetry Operations and Reconstruction Group that manages the day-to-day operations of all CDF calorimeters and as an Subsystem Project Leader (SPL) of CDF's Run II plug calorimeter system (Mar 2001 - now). Dr. Sakumoto's current physics interests at CDF are in the dynamics of Drell-Yan production W and Z bosons and their leptonic decays, and in the measurement of the top quark mass at proton-antiproton colliders. His physics analyses are focused on Drell-Yan electron and muon pair production in the Z-boson resonance region: studies on QED radiative corrections to the process; measurement of the transverse momentum cross section of e+e- pairs in the Z-boson mass region of 66 - 116 GeV/c2; measurements of the rapidity (y) and total Z cross sections of e+e- pairs with full rapidity coverage via the inclusion of forward pairs; and measurements of the e+e- differential mass distribution and the forward-backward decay asymmetry of those pairs. For further details, go to Dr. Sakumoto's home page at: