
Dr. Ulrich Baur



Professor, Ph.D. University of Munich (1985)
Office: 265 Fronczak Hall, (716) 6455901
Email: baur@ubhep.physics.buffalo.edu


Education 

Ph.D.  University of Munich (1985)
B.S.  University of Munich (1982)

Research Interests 

 Measuring top quark couplings at hadron colliders
 Electroweak corrections to W production in hadronic collisions
 Wgammagamma production and anomalous WWgammagamma couplings
 Probing the weak boson sector in ZZ production at hadron colliders


My research focuses on highenergy physics, in particular collider
physics. For the past few years, I have concentrated on diboson
production; that is, the production of WZ, Wphoton, and Zphoton
pairs (the W and Z bosons are the carriers of the weak force) at the
Tevatron Collider, located at Fermi National Accelerator Laboratory
(Fermilab) about forty miles west of Chicago. The Tevatron collides
protons and antiprotons at a center of mass energy of 1800 GeV.
Diboson production is interesting because it opens new ways to
test the GlashowWeinbergSalam (GWS) model of electroweak
interactions. The GWS model is based on a nonabelian gauge theory
with gauge group SU(2)xU(1). Because of its gauge theory nature,
the GWS model exactly predicts the selfinteractions of W and Z
bosons and photons, and these selfinteractions can be tested in W
and Z boson pair production.
In a series of research papers, I have reported on calculations of
these processes at leading order and nexttoleading order in
perturbation theory. Monte Carlo event generators have been made
available to experimenters, which allow a realistic simulation of di
boson production in Tevatron experiments. A few of these papers are
listed at right.
More recently, I have become interested in how electroweak
radiative corrections and multiple photon radiation shift the
experimentally measured W and Z boson masses, and how the
couplings of the top quark can be measured at hadron colliders.

Selected Publications 
 "Direct Measurement of the top quark charge at hadron colliders", U.Baur, M. Buice, and L. Orr, Phys. Rev. D64, 094019 (2001).
 "Electroweak radiative corrections to W boson production in hadronic collisions", U. Baur, S. Keller, and D. Wackeroth, Phys. Rev. D59, 013002 (1999)
 "QED radiative correction to Z boson production and the forwardbackward asymmetry at hadron colliders", U. Baur, S. Keller, and W. K. Sakumoto, Phys. Rev. D57, 199 (1998).
 "QCD corrections and nonstandard three vector boson couplings in W+W production at hadron colliders", U. Baur, T. Han, and J. Ohnemus, Phys. Rev. D53, 1098 (1996).
 "Finite width effects and gauge invariance in radiative W production and decay", U. Baur and D. Zeppenfeld, Phys. Rev. Lett. 75, 1002 (1995)






