Helmut Vogel

Professor, Physics

Education

Ph.D., University of Erlangen-Nuremberg, Germany

Research

Research interests are in experimental high-energy particle physics and, in particular, the use of proton-proton and electron-positron colliding beam accelerators.

Our group is a member of the Compact Muon Solenoid (CMS) collaboration, which has constructed a massive detector for the Large Hadron Collider (LHC).  The LHC is a 14 TeV proton-proton colliding beam accelerator at the European accelerator center, CERN, in Geneva, Switzerland.  To find out more, visit the CMS web page at: http://cms.cern.ch/ and CERN's web page at http://public.web.cern.ch/public/.  When the LHC turns on in the fall of 2009, it will be the highest-energy acceleratorin the world, exceeding the Tevatron accelerator at Fermilab by a factor of 7 in energy.  With the CMS detector, we hope to discover not only the Higgs boson of the Standard Model, but entirely new families of particles predicted by various theories, among them possible candidates for the Dark Matter that makes up a large fraction of the matter in the universe.

Our group is also a member of the CLEO experiment (http://www.lepp.cornell.edu/Research/EPP/CLEO/) at the electron-positron collider, CESR, at Cornell University in Ithaca, NY.  The experiment has completed data taking but data analysis is still in progress.  We are studying the properties of the heavy "b" (beauty) and "c" (charm) quarks.  The weak decays of these quarks probe the CKM structure of the Standard model.  The spectrum and decays of "quarkonium" (bound states of a quark with its own antiquark) probe theoretical potential models and quantum chromodynamics, QCD.

Selected Publications

• G. Adams et al. (CLEO Collaboration), Observation of J/Ψ→3 γ, Phys. Rev. Letters 101, 101801 (2008).
• K.M. Ecklund et al., Two-Photon Widths of the Χ_cJ States of Charmonium, Phys. Rev. D 78, 091501 (R) (2008).
• P. Rubin et al. (CLEO Collaboration), Search for Invisible Decays of the Υ(1S) Resonance, Phys. Rev. D 75, 031104 (2007).
• P. Achard et al. (L3 Collaboration), Analysis of the π⁺π^-π⁺π^- and π⁺π⁰π^-π⁰ Final States in Quasi-Real 2-Photon Collisions at LEP, Phys. Lett. B 638, 128 (2006).
• J. L. Rosner et al. (CLEO Collaboration), Observation of the h_c(¹P₁) State of Charmonium, Phys. Rev. Lett. 95, 102003 (2005).
• M. Artuso et al. (CLEO Collaboration), Photon Transitions in Υ(2S) and Υ(3S) Decays, Phys. Rev. Lett. 94, 032001 (2005).
• R.A. Briere et al. (CLEO Collaboration), New Measurements of Υ(1S) Decays to Charmonium Final States, Phys. Rev. D 70, 072001 (2004).
• G. Bonvicini et al. (CLEO Collaboration), First Observation of a Υ(1D) State, Phys. Rev. D 70, 032001 (2004).