Beyond N = 1 Supergravity
The gauge symmetry describing electro-weak unification has to be put in by hand. Thus, we really need two fundamental principles to derive the laws of physics: first, the equivalence principle to derive gravitational forces; and second, the local Yang-Mills symmetry to derive the rest of the interactions. It certainly would be more satisfying if both these principles could be combined into one.
The matter fields are chosen to fit phenomenology rather than being an outcome of the theoretical principles. It would certainly be more desirable if the basic principle that yields the physical laws could also yield the matter multiplets.
Finally, the age-old problem of divergences that beset the local field theories since their introduction to physics does not get resolved by the N = 1 supergravity theories. In fact, this problem is worse for N = 1 supergravity theories than either globaly supersymmetric or non-supersymmetric theories. In that sense, it could be construed as a step backward in the quest for the ultimate theory.
KeywordsGauge Group Clifford Algebra Supergravity Theory Supersymmetric Theory Extended Supersymmetry
Unable to display preview. Download preview PDF.
- B. deWit, P. G. Lauwers, R. Philippe, S. Q. Su, and A. Van Proyen, preprint NIKHEF-H/83–13 (1983);Google Scholar
- F. del Aguila, B. Brinstein, L. Hall, G. G. Ross, and P. West, HUTP 84/A001, 1984;Google Scholar
- S. Kalara, D. Chang, R. N. Mohapatra, and A. Gangopadhyaya, Phys. Lett. 145B, 323 (1984);Google Scholar
- A. Parkes and P. West, 127B, 353 (1983).Google Scholar
- J. Koller, Cal. Tech. preprint 68–975, 1982;Google Scholar
- G. Sierra and P. K. Townsend, Ecole Normale preprint, LPTENS 83 /26, 1983;Google Scholar
- J. Sherk, Ecole Normale preprint, 1979;Google Scholar
- M. Duff, Lectures at the GIFT Summer School, San Feliu de Guixols, Spain, 1984.Google Scholar
- M. Duff and C. N. Pope, in Supersymmetry and Supergravity ‘82 (edited by S. Ferrara et al.), World Scientific, Singapore, 1983.Google Scholar
- K. Pilch and A. N. Schellekens, Stony Brook preprint, 1985;Google Scholar
- E. Witten, Princeton preprint, 1985.Google Scholar
- M. Dine, V. Kaplunovsky, M. Mangano, C. Nappi, and N. Seiberg, Nucl. Phys. B (1985) (in press);Google Scholar
- J. Breit, B. Ovrut, and G. Segre, Phys. Lett. B158, 33 (1985);Google Scholar
- J. P. Deredings, L. Ibanez, and H. P. Nilles, Phys. Lett. 155B, 65 (1985); and CERN preprint CERN-TH-4228/85, 1985;Google Scholar
- V. S. Kaplunovsky and Chiara Nappi, Comments on Nuclear and Particle Physics (1986) (to appear).Google Scholar
- F. Geursey, P. Ramond, and P. Sikivie, Phys. Lett. 60B, 117 (1976);Google Scholar
- Y. Achiman and B. Stech, Phys. Lett. 77B, 389 (1987);Google Scholar
- Q. Shafi, Phys. Lett. 79B, 301 (1978);Google Scholar
- P. K. Mohapatra, R. N. Mohapatra, and P. Pal, Phys. Rev. D (1986).Google Scholar