Zobrazeno 1 - 10
of 340
pro vyhledávání: '"Minasian R."'
Autor:
Hassan, S. F., Minasian, R.
Non-trivial configurations of Yang-Mills fields and gravitational backgrounds induce charges on Dp-branes that couple them to lower and higher RR potentials. We show that these couplings can be described in a systematic and coordinate independent way
Externí odkaz:
http://arxiv.org/abs/hep-th/0008149
Publikováno v:
JHEP9809:004,1998
We use the anomaly cancellation of the M-theory fivebrane to derive the R-symmetry anomalies of the $A_{N}$ $(0,2)$ tensor-multiplet theories. This result leads to a simple derivation of black hole entropy in $d=4, \mathcal{N}=2$ compactifications of
Externí odkaz:
http://arxiv.org/abs/hep-th/9808060
Publikováno v:
Adv.Theor.Math.Phys.2:601-618,1998
We study gravitational anomalies for fivebranes in M theory. We show that an apparent anomaly in diffeomorphisms acting on the normal bundle is cancelled by a careful treatment of the M theory Chern-Simons coupling in the presence of fivebranes. One
Externí odkaz:
http://arxiv.org/abs/hep-th/9803205
Publikováno v:
Phys.Lett.B424:53-59,1998
We present a few remarks on disconnected components of the moduli space of heterotic string compactifications on $T_2$. We show in particular how the eight dimensional CHL heterotic string can be understood in terms of topologically non-trivial $E_8\
Externí odkaz:
http://arxiv.org/abs/hep-th/9711104
Publikováno v:
Nucl.Phys. B507 (1997) 571-588
We discuss several implications of R^4 couplings in M theory when compactified on Calabi-Yau (CY) manifolds. In particular, these couplings can be predicted by supersymmetry from the mixed gauge-gravitational Chern-Simons couplings in five dimensions
Externí odkaz:
http://arxiv.org/abs/hep-th/9707013
Publikováno v:
Phys.Lett. B412 (1997) 281-287; Nucl.Phys.Proc.Suppl. 68 (1998) 295-302
We generalize the supermembrane solution of D=11 supergravity by permitting the 4-form $G$ to be either self-dual or anti-self-dual in the eight dimensions transverse to the membrane. After analyzing the supergravity field equations directly, and als
Externí odkaz:
http://arxiv.org/abs/hep-th/9706124
Publikováno v:
Nucl.Phys.B493:249-280,1997
We study some applications of solvable Lie algebras in type IIA, type IIB and M theories. RR and NS generators find a natural geometric interpretation in this framework. Special emphasis is given to the counting of the abelian nilpotent ideals (trans
Externí odkaz:
http://arxiv.org/abs/hep-th/9612202
Publikováno v:
Nucl.Phys.B465:413-438,1996
We re-examine the question of heterotic - heterotic string duality in six dimensions and argue that the $E_8\times E_8$ heterotic string, compactified on $K3$ with equal instanton numbers in the two $E_8$'s, has a self-duality that inverts the coupli
Externí odkaz:
http://arxiv.org/abs/hep-th/9601036
Publikováno v:
Nucl.Phys. B452 (1995) 261-282
Membrane/fivebrane duality in D=11 implies Type IIA string/Type IIA fivebrane duality in D=10, which in turn implies Type IIA string/heterotic string duality in D=6. To test the conjecture, we reproduce the corrections to the 3-form field equations o
Externí odkaz:
http://arxiv.org/abs/hep-th/9506126
Autor:
Duff, M. J., Minasian, R.
Publikováno v:
Nucl.Phys. B436 (1995) 507-528
After simultaneous compactification of spacetime and worldvolume on $K3$, the $D=10$ heterotic fivebrane with gauge group $SO(32)$ behaves like a $D=6$ heterotic string with gauge group $SO(28) \times SU(2)$, but with Kac--Moody levels different from
Externí odkaz:
http://arxiv.org/abs/hep-th/9406198