Abstract
We study realisations of the exceptional non-linear (quadratically generated, or W-type) N = 8 and N = 7 superconformal algebras with Spin(7) and G2 affine symmetry currents, respectively. Both the N = 8 and N = 7 algebras admit unitary highest-weight representations in terms of a single boson and free fermions in 8 of Spin(7) and 7 of G2, with the central charges c8 = 26/5 and c7 = 5, respectively. Furthermore, we show that the general coset ansätze for the N = 8 and N = 7 algebras naturally lead to the coset spaces SO(8) × U(1)/SO(7) and SO(7) × U(1)/G2, respectively, as the additional consistent solutions for certain values of the central charge. The coset space SO(8)/SO(7) is the seven-sphere S7, whereas the space SO(7)/G2 represents the seven-sphere with torsion, S7T. The division algebra of octonions and the associated triality properties of SO(8) play an essential role in all these realisations. We also comment on some possible applications of our results to string theory.
| Original language | English |
|---|---|
| Pages (from-to) | 215-246 |
| Number of pages | 32 |
| Journal | Nuclear Physics B |
| Volume | 467 |
| Issue number | 1-2 |
| DOIs | |
| Publication status | Published - 13 May 1996 |
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Keywords
- Conformal field theory
- Seven sphere
- String theory
- Superconformal symmetry
- Triality
ASJC Scopus subject areas
- Nuclear and High Energy Physics
Cite this
Seven-sphere and the exceptional N = 7 and N = 8 superconformal algebras. / Günaydin, Murat; Ketov, Sergei V.
In: Nuclear Physics B, Vol. 467, No. 1-2, 13.05.1996, p. 215-246.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Seven-sphere and the exceptional N = 7 and N = 8 superconformal algebras
AU - Günaydin, Murat
AU - Ketov, Sergei V.
PY - 1996/5/13
Y1 - 1996/5/13
N2 - We study realisations of the exceptional non-linear (quadratically generated, or W-type) N = 8 and N = 7 superconformal algebras with Spin(7) and G2 affine symmetry currents, respectively. Both the N = 8 and N = 7 algebras admit unitary highest-weight representations in terms of a single boson and free fermions in 8 of Spin(7) and 7 of G2, with the central charges c8 = 26/5 and c7 = 5, respectively. Furthermore, we show that the general coset ansätze for the N = 8 and N = 7 algebras naturally lead to the coset spaces SO(8) × U(1)/SO(7) and SO(7) × U(1)/G2, respectively, as the additional consistent solutions for certain values of the central charge. The coset space SO(8)/SO(7) is the seven-sphere S7, whereas the space SO(7)/G2 represents the seven-sphere with torsion, S7T. The division algebra of octonions and the associated triality properties of SO(8) play an essential role in all these realisations. We also comment on some possible applications of our results to string theory.
AB - We study realisations of the exceptional non-linear (quadratically generated, or W-type) N = 8 and N = 7 superconformal algebras with Spin(7) and G2 affine symmetry currents, respectively. Both the N = 8 and N = 7 algebras admit unitary highest-weight representations in terms of a single boson and free fermions in 8 of Spin(7) and 7 of G2, with the central charges c8 = 26/5 and c7 = 5, respectively. Furthermore, we show that the general coset ansätze for the N = 8 and N = 7 algebras naturally lead to the coset spaces SO(8) × U(1)/SO(7) and SO(7) × U(1)/G2, respectively, as the additional consistent solutions for certain values of the central charge. The coset space SO(8)/SO(7) is the seven-sphere S7, whereas the space SO(7)/G2 represents the seven-sphere with torsion, S7T. The division algebra of octonions and the associated triality properties of SO(8) play an essential role in all these realisations. We also comment on some possible applications of our results to string theory.
KW - Conformal field theory
KW - Seven sphere
KW - String theory
KW - Superconformal symmetry
KW - Triality
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U2 - 10.1016/0550-3213(96)00088-0
DO - 10.1016/0550-3213(96)00088-0
M3 - Article
AN - SCOPUS:0030582003
VL - 467
SP - 215
EP - 246
JO - Nuclear Physics B
JF - Nuclear Physics B
SN - 0550-3213
IS - 1-2
ER -