Since the mid-1980s, much of my research has dealt with the physics possibilities of high-energy colliders. The central issue for particle physics today is the difference between the weak and electromagnetic interactions, the problem of electroweak symmetry breaking that the Large Hadron Collider at CERN will help to resolve. I have been interested in all approaches to this problem, including supersymmetry, technicolor, and the possibility of strong interactions among the electroweak gauge bosons. Exploring the 1-TeV scale has been one of my passions; it will figure prominently in my ongoing research.

My theoretical research has always been strongly influenced by experimental results and possibilities. I have worked recently on two lines inspired by the promise of high-sensitivity studies of b-quarks in hadron colliders. The first of these (with Estia Eichten and Chris Hill) involves the use of p-wave B mesons to tag the flavor and four-momentum of their daughter B mesons. Heavy-quark symmetry relates properties of B mesons and charmed mesons and makes interesting predictions for the spectrum and decays of the excited charmed mesons as well. The properties of the charmed states are being studied at Cornell and Fermilab, and will ultimately be pursued at the B factories. The second investigation (with Eichten) concerns mesons with beauty and charm, which we hope will be discovered in the just-completed run of the Tevatron collider. These bound states of a heavy quark and a different heavy antiquark are of interest both for their spectrum­the Bc family is the strong-interaction analog of a muonic atom­and for the peculiar pattern of their weak decays. Since the discovery of the top quark, I have explored the new opportunities opened by this heaviest quark.

Over the past year, I have also been working on the interactions of ultrahigh-energy neutrinos (up to 1021 eV) with matter, with an eye to the development of large-volume detectors for neutrino astronomy.

Physics 539, Gauge Theories and Particle Physics

Top-ology, talk presented at LISHEP95, Rio de Janeiro, FERMILAB­PUB­95/139­T, hep-ph/9507257 (18 pages: in PostScript format, 344KB).

Top Priorities, Questions for Snowmass '96 (3 PostScript pages, 57KB); One-page version for the Snowmass Proceedings in PDF format, 116KB.

Particle Physics: Themes and Challenges, opening lecture at the Second Rencontres du Vietnam, FERMILAB­PUB­95/353­T, hep-ph/9511438 (12 pages: in PostScript format, 224KB).

Orbitally Excited Heavy-Light Mesons Revisited, FERMILAB-CONF-94/118-T, by Eichten, Hill, and Quigg, from the CHARM2000 Workshop (16 pages: PostScript, 188KB). This paper updates and extends the results in Phys. Rev. Lett. 71, 4116 (1993). [Published in The Future of High-Sensitivity Charm Experiments, edited by D. M. Kaplan and S. Kwan, FERMILAB-Conf-94/190, p. 355.]

Ultrahigh-Energy Neutrino Interactions, by R. Gandhi, C. Quigg, M. H. Reno, and I. Sarcevic, FERMILAB­PUB­95/221­T, hep-ph/9512364 (51 pages: in Compressed PostScript format, 396KB). Colorized figures. There is an informal supplementary note on Neutrinos from Topological Defects (4 PostScript pages, 96KB) and a colorized figure of the fluxes.

Supercollider Physics, by E. Eichten, I. Hinchliffe, K. Lane, and C. Quigg, Rev. Mod. Phys. 56, 579 (1984).