Heavy quarks and long-lived hadrons
- Creators
- Appelquist, Thomas
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Politzer, H. David
Abstract
In a recent Letter we reported on some work which led us to suggest the possibility of narrow spikes in the e+e- annihilation cross section into hadrons. In this paper, we discuss the theoretical infrastructure of this work more thoroughly, and improve and extend the calculations and experimental predictions. We examine a colored quark-gluon model of hadronic matter, with color an exact SU(3) gauge symmetry. In addition to the light quarks that make up ordinary hadrons, a heavy quark, such as the charmed c, is included. The narrow resonances recently discovered by the MIT-BNL and SLAC-LBL groups are interpreted as cc̅ bound states (orthocharmonium). In this energy range, the effective coupling has become small according to asymptotic freedom, and many aspects of the bound-state structure can be calculated. The existence of 0-(paracharmonium) states is predicted, and decay widths and mass splittings are estimated. The total e+e- cross section into hadrons is predicted to scale asymptotically, with an approach to scaling from above that can be calculated over a large energy range.
Additional Information
©1975 The American Physical Society Received 14 April 1975 (T.A.) Alfred P. Sloan Fellow. Research sponsored in part by the U. S. Atomic Energy Commission Grant No. AT(11-1)-2220 and by the National Science Foundation Grant No. NSF GP-40397X, Harvard University. (H.D.P.) Junior Fellow, Harvard University Society of Fellows. Work supported in part by the U. S. Atomic Energy Commission Grant No. AT(11-1)-68. We are indebted to many colleagues for help during the course of this work. Particular thanks are due to Leonard Susskind for discusisons at the 1974 Aspen Institute where this work was begun and to Kenneth Wilson for his encouragement. At Harvard, we were continually questioned and helped by Helen Quinn, Howard Georgi, R. Shankar, Sheldon Glashow, Howard Schnitzer, Asim Yildiz, Karl Strauch, and Alvaro De Rújula. We also hank John Kogut, Harald Fritzsch, Peter Minkowski, David Gross, and Ivan Muzinich for helpful remarks.Files
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Additional details
- Eprint ID
- 2868
- Resolver ID
- CaltechAUTHORS:APEprd75
- Created
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2006-05-04Created from EPrint's datestamp field
- Updated
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2021-11-08Created from EPrint's last_modified field