## Ulrich Baur

## Associate Professor

High Energy Physics, Strong and Electroweak Interactions## Contact Information

## Brief CV

- B.S., University of Munich (1982)
- Ph.D., University of Munich (1985)
## Selected Publications

- U. Baur, T. Han, N. Kauer, R. Sobey, and D. Zeppenfeld. W-gamma-gamma production at the Fermilab Tevatron Collider: Gauge invariance and radiation amplitude zero.
Phys. Rev. D56:140 (1997).- U. Baur, T. Han, and J. Ohnemus. QCD corrections and non-standard three vector boson couplings in W
^{+}W^{-}production at hadron colliders.Phys. Rev. D53:1098 (1996).- U. Baur and D. Zeppenfeld. Finite width effects and gauge invariance in radiative W production and decay.
Phys. Rev. Lett.75:1002 (1995).- U. Baur, T. Han, and J. Ohnemus. Amplitude zeros in W
^{+}Z production.Phys. Rev. Lett. 72: 3941 (1994).- U. Baur, G. Landsberg, and S. Errede, Rapidity Correlations in W-gamma production at hadron colliders.
Phys. Rev. D50:1917 (1994).## Research Interests

My research is focused on High Energy Physics, in particular Collider Physics. For the last few years I have concentrated on di-boson production, ie. the production of WZ, W-photon and Z-photon pairs (the W and Z bosons are the carriers of the weak force) at the Tevatron collider. The Tevatron collides protons and anti-protons at a center of mass energy of 1800 GeV and is located at Fermi National Accelerator Laboratory (Fermilab) about 40 miles west of Chicago. Di-boson production is interesting since it opens new ways to test the Glashow-Weinberg-Salam (GSW) model of electroweak interactions. The GSW model is based on a non-abelian gauge theory with gauge group SU(2)xU(1). Because of its gauge theory nature the GSW model exactly predicts the self-interactions of W and Z bosons, and photons, and these self-interactions 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 next-to-leading 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 above. More recently I have become interested in how electroweak radiative corrections and multiple photon radiation shift the experimentally measured W and Z boson masses.## Current Projects

- QCD corrections to Z-gamma production in hadronic collisions for general ZZ-gamma and Z-gamma-gamma couplings
- Electroweak corrections to W Production in Hadronic collisions
- W-gamma-gamma Production and anomalous WW-gamma-gamma couplings
- Probing the weak boson sector in ZZ production at hadron colliders