Summary
Exceptional realizations of the Lorentz group are given via the exceptional Jordan algebra of Jordan, von Neumann and Wigner. The exceptionalSL 2,C multiplets generate an intrinsically nonassociative algebra and have built in non-Abelian charge space properties. Considering these multiplets as the basis of a superspace it is shown how to give realizations of exceptional supersymmetry groups which incorporate important charge-space groups in a nontrivial way and which are different from the usual Clifford algebraic supersymmetry groups. Possible applications to the leptonic world are indicated.
Riassunto
Si danno realizzazioni eccezionali del gruppo di Lorentz attraverso l’algebra di Jordan eccezionale di Jordan, von Neumann e Wigner. I multiplettiSL 2,C eccezionali generano un’algebra intrinsecamente non associativa ed hanno incluse proprietà dello spazio delle cariche non abeliane. Considerando questi multipletti come base di un superspazio si mostra come dare realizzazioni di gruppi di supersimmetria eccezionali che incorporano in modo non banale importanti gruppi dello spazio delle cariche e che sono diversi dagli usuali gruppi di supersimmetria dell’algebra di Clifford. Si indicano possibili applicazioni al mondo leptonico.
Реэюме
Приводятся исключительные реалиэации группы Лорентца с исполь-эованием алгебры Джордана, фон Неймана и Вигнера. Исключительные мульти-плеты SL2, с генерируют внутренне неассоциативную алгебру и обладают свойстваминеабелева пространства эаряда. Рассматривая зти мультиплеты, как основу длясуперпростра нства, покаэывается, как можно получить реалиэации исключительныхгрупп суперсимметрии нетривиальным обраэом и, которые отличаются от обычныхалгебраич еских групп суперсимметрии Клиффорда. Обсуждаются воэможные приме-нения к лептонному миру.
Similar content being viewed by others
Literatur
J. Wess andB. Zumino:Nucl. Phys.,70 B, 39 (1974).
P. Ramond:Phys. Rev. D,3, 2415 (1971);A. Neveu andJ. H. Schwarz:Nucl. Phys.,31 B, 86 (1971);Y. Aharonov, A. Casher andL. Susskind:Phys. Lett.,35 B, 512 (1971);J. L Gervais andB. Sakita:Nucl. Phys.,34 B, 633 (1971).
A. Salam andJ. Strathdfe: Trieste preprint IC/74/11.
A. Salam andJ. Strathdee: Trieste preprint IC/74/16.
A. Salam andJ. Strathdee: Trieste preprint IC/74/42.
S. Ferrara, J. Wess andB. Zumino: CERN preprint TH-1863 (1974).
A. Salam andJ. Strathdee: Trieste preprint IC/74/36.
S. Ferrara andB. Zumino: CERN preprint TH-1866.
A. Salam andJ. Strathdee: Trieste preprint IC/74/80.
E. P. Wigner:Phys. Rev.,51, 105 (1937).
F. Gürsey andL. A. Radicati:Phys. Rev. Lett.,13, 173 (1964).
B. Sakita:Phys. Rev.,136, B 1756 (1964).
M. Günaydin andF. Gürsey:Lett. Nuovo Cimento,6, 401 (1973).
M. Günaydin andF. Gürsey:Journ. Math. Phys.,14, 1651 (1973).
M. Günaydin: Ph. D. Thesis, Yale University (1973), unpublished.
M. Günaydin andF. Gürsey:Phys. Rev. D,9, 3387 (1974).
F. Gürsey:Johns Hopkins University Workshop on Current Problems in High-Energy Particle Theory (Baltimore, Md., 1974), p. 15.
F. Gürsey:Algebraic methods and quark structure, Yale preprint (1975), to be published in theProceedings of the Kyoto Conference on Mathematical Problems in Theoretical Physics, Jan. 23–29, 1975.
The literature on the principle of triality is quite extensive. Here we list only a few:J. Tits:Acad. Roy. Belg. Bull. Cl. Sci., (5)44, 332 (1958);C. Chevalley andR. D. Schafer:Proc. Nat. Acad. Sci.,36, 137 (1950);C. Chevalley:Algebraic Theory of Spinors, Chap. 4 (New York, N. Y., 1954). See als ref. (25), whose notation we follow.
I. Yokota:Journ. Fac. Sci. Shinshu Univ.,3, 35 (1968).
P. Jordan, J. von Neumann andE. P. Wigner:Ann. Math.,35, 29 (1934).
See the review paper ofH. Freudenthal:Adv. Math.,1, 145 (1964).
N. Jacobson:Structure and Representations of Jordan Algebras, Amer. Math. Soc. Coll. Publ., Vol.39 (1968).
M. Koecher:Inventiones Math.,3, 136 (1967).
TheSU 6 decomposition ofE 6 was given in a different setting byC. Chevalley:Compt. Rend.,232, 1991 (1951).
ThisSU 2-group was designated asSU 2 I in ref. (14).
SeeS. Weinberg:Phys. Rev. Lett.,19, 1264 (1967);A. Salam:Proceedings of the VIII Nobel Symposium (New York, N. Y., 1968).
F. Gürsey andG. Feinberg:Phys. Rev.,128, 378 (1962).
Here one may speculate and try to interpret some of the neutral vector fields of the adjoint representation as the fields corresponding to the narrow resonances recently discovered at Brookhaven and SLAC (see ref. (39)). However if this interpretation is correct, then one would expect a large family of such resonances which must fit into the adjoint representation of the supersymmetry group.
J. J. Aubert, U. Becker, J. P. Biggs, J. Burger, M. Chen, G. Everhart, P. Goldhagen, J. Leong, T. McCorriston, T. G. Rhoades, M. Rohde, S. C. C. Ting, S. L. Wu andY. Y. Lee:Phys. Rev. Lett.,33, 1404 (1974);J.-E. Augustin, A. M. Boyarski, M. Breidenbach, F. Bulos, J. T. Dakin, G. J. Feldman, G. E. Fischer, D. Fryberger, G. Hanson, B. Jean-Marie, R. R. Larsen, V. Lüth, H. L. Lynch, D. Lyon, C. C. Morehouse, J. M. Paterson, M. L. Perl, B. Richter, P. Rapidis, R. F. Schwitters, W. M. Tanenbaum, F. Vannucci, G. S. Abrams, D. Briggs, W. Chinowsky, C. E. Friedberg, G. Goldhaber, R. J. Hollebeek, J. A. Kadyk, B. Lulu, F. Pierre, G. H. Trilling, J. S. Whitaker, J. Wiss andJ. E. Zipse:Phys. Rev. Lett.,33, 1406 (1974).
The literature on the exceptional Jordan algebra is very extensive. For details and further references we refer the reader to ref. (28) and to the bookR. D. Schafer:An Introduction to Nonassociative Algebras (New York, N. Y., 1966). Our notation follows closely the ref. (25,27).
J. Tits:Nederl. Akad. Wetensch. Proc., Ser. A,65, 530 (1962). For a simplified exposition, see ref. (40).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Günaydin, M. Exceptional realizations of the lorentz group: Supersymmetries and leptons. Nuov Cim A 29, 467–503 (1975). https://doi.org/10.1007/BF02734524
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1007/BF02734524