Jonas SchultzProfessor, Physics & Astronomy |
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Research Interests |
Elementary particle physics | |
| URL | www.physics.uci.edu/faculty/schultz.html | |
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Research Abstract |
Professor Schultz's research is in the area of experimental elementary particle physics. He is currently involved in several high-energy experiments in collaboration with Professor Mark Mandelkern. One of the experiments (Fermilab experiment E835) is principally a study of charmonium states formed in proton-antiproton annihilations, which has a number of significant advantages over the more common way of studying these charmed quark-antiquark bound states, i.e., by formation in electron-positron colliders. The proton-antiproton method allows for study of states of all possible quantum numbers, and, due to the unique and extraordinary beam momentum resolution of the Fermilab Antiproton Source, states can be scanned with very fine resolution in center-of- mass energy. E835 is a continuation of a previous experiment (E760), which determined the best values of masses and widths for several charmonium states and detected for the first time the singlet P state of charmonium. A second experiment in this program is a study of antihydrogen. Although antiparticles are regularly produced in experiments, until recently no one had ever produced and detected an anti-atom. The E835 apparatus at Fermilab, which consists of a hydrogen gas jet target in an antiproton beam, offered the possibility of producing antihydrogen by means of electron-positron pair production in the collision, with subsequent capture of the positron. In 1996-97, Fermilab experiment E862 produced and unambiguously detected a background-free sample of antihydrogen atoms. Further studies are planned to perform spectroscopy on antihydrogen with the ultimate goal of comparing the n=2 energy splittings with those of atomic hydrogen. Such a comparison would constitute a test of the important CPT Theorem. Professor Schultz enjoys teaching enormously and has taught, among other courses, graduate Quantum Mechanics, Advanced Quantum Mechanics, Mathematical Methods, and Elementary Particle Theory. |
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| Publications |
Measuring the Antihydrogen Lamb Shift with a Relativistic Antihydrogen Beam, G. Blanford, et al., Phys. Rev. D 57, 6649 (1998). |
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| Observation of Atomic Antihydrogen, G. Blanford, et al., Phys. Rev. Lett. 80, 3037 (1998). | ||
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Measurement of the branching ration psi' --> e+e-, psi' --> J/psi pi pi and psi' --> J/psi eta, T. A. Armstrong, et al., Phys. Rev. D55, 1153 (1997). |
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| Observation of the Radiative Decay J/psi --> e+e- gamma, T.A. Armstrong, et al., Phys. Rev. D54, 7067 (1996). | ||
| Proton Electromagnetic Form Factors in the Time-Like Region from 8.9 to 13.0 GeV^2, T. A. Armstrong, et al., Phys. Rev. Lett. 70, 1212 (1993). | ||
| Measurement of the J/psi and psi' Resonance Parameters in proton-antiproton Annihilation, T. A. Armstrong, et al., Phys. Rev. D47, 772 (1993). | ||
| Link to this profile | http://www.faculty.uci.edu/profile.cfm?faculty_id=2189 | |
| Last updated | 10/19/2004 | |