Faculty Profile
  Z. Zhao, Z. G. Zhao
Department: Department of Modern Physics
Mailing Address:
96 Jingzhai Rd. Department of Modern Physics, University of Science and Technology of China, 230026 Hefei, Anhui
Postal Code:

Research Profile

Zhao Zhengguo graduated from the Department of Modern Physics, University of Science and Technology of China (USTC) and received his Ph.D. from USTC in 1988. Zhao worked as a postdoctor for the Beijing Spectrometer experiment (BES) at Beijing Electron Positron Collider (BEPC) at the Institute of High Energy Physics (IHEP) of the Chinese Academy of Sciences (CAS) from 1988 to 1990. From 1990 to 1997, he was a postdoctor and research associate at Institute for Particle Physics (IPP) of Swiss Federal Institute of Technology (ETHZ). He was recruited to IHEP of CAS as the first “CAS 100 Talent Program” member of IHEP in 1997, and led the BES Collaboration and the Physics Division of IHEP.  He jointed Physics Department of University of Michigan (UoM), as a visiting scientist and senior research scientist for the ATLAS experiment from 2001 to 2008. He was recruited to USTC as “National Thousand Talent Program” in 2008 and is now the director of the Center for Particle Science and Technology (CPST) of USTC. 

During his stay at ETHZ, he and his collaborators precisely measured the strong interaction shift, and for the first time observed the energy broadening of the ground states of the pionic hydrogen and deuterium (exotic atoms). These results are still the most precise experimental data for the determination of S wave scattering length of pion and nuclear scattering, which are important physics quantities for the development and test of Chiral perturbation theory. 

As the BES spokesperson and the director of the Physics Division of IHEP from 1997 to 2001, he successfully led the BES experiment. In addition, he directly led BES performed R scan – measurement of the R value with BESII in the energy region between 2 and 5 GeV. This experiment clarified the inconsistent results from different experiments and improved the accuracy about a factor of three. The results made great contribution to the indirect measurement of the Higgs mass from the Standard Model fit to the available electroweak data, and precision determination of the QED running coupling constant and the interpretation of the results of g-2 experiment. R scan done with BESII was regarded as one of the most important contribution to the high-energy physics. The results has been collected by PDG and written to the text book for high energy physics.

When worked at UoM, Prof. Zhao played an important role to the construction and commissioning of the ATLAS monitored drift tube (MDT) of the muon spectrometer. His great contribution was recognized world wide in the ATLAS community. His interest for ATLAS experiment is search for Higgs and new physics beyond the SM, and physics with diboson. 

Prof. Zhao has been re-elected to be the BES co-spokesperson since 2009 and his research interest with BES is search for exotic hadrons, new physics beyond the SM and charmonium physics. 
Selected Publications
1) Determination of the S-Wave Scattering Length in Pionic Deuterium with a High Resolution Crystal Spectrometer , Phys. Rev. Lett. 74 (1995) 4157-4160 , 1995 , 74
2) Strong Interaction Shift and Width of the 1S Level in Pionic Hydrogen , Phys. Rev. Lett. 75, (1995) 3245-3 , 1995 , 75
3) The KARMEN time anomaly: Search for a neutral particle of mass 33.9 MeV in pion decay. , Phys.Rev.Lett. 85:1815-1818, 2000 , 2000 , 85:1815-1818
4) Measurement of the Total Cross Section for Hadronic Production by e+e- Annihilation at Energies between 2.6–5 GeV , Phys. Rev. lett. 84, (2000)594-597. , 2000 , 84
5) The BES upgrade , NIM A 458 (2001) 627-637 , 2001 , 458 (2001) 627-637
6) Measurements of the Cross Section for e+e- -> Hadrons at Center-of-Mass Energies from 2 to 5 GeV , Phys. Rev. lett. 88, (2002) 018021,1-5 , 2002 , 88
7) Measurement of the W+W- cross section in sqrt{s} = 7 TeV pp collisions with ATLAS, ATLAS Collaboration , Physics Review Letter , 2011 , 107
8) The ATLAS Experiment at the CERN Large Hadron Collider , JINST 3 (2008) S08003 , 2008 , J3
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TEL: +86-551-63600279, E-mail: tianlin@ustc.edu.cn