Zobrazeno 1 - 10
of 690
pro vyhledávání: '"Kutasov, D."'
Publikováno v:
Nucl.Phys.B784:1-21,2007
We study a class of intersecting D-brane models in which fermions localized at different intersections interact via exchange of bulk fields. In some cases these interactions lead to dynamical symmetry breaking and generate a mass for the fermions. We
Externí odkaz:
http://arxiv.org/abs/hep-th/0608177
Publikováno v:
Nucl.Phys.B776:93-117,2007
We study an intersecting D-brane model which at low energies describes (1+1)-dimensional chiral fermions localized at defects on a stack of N_c D4-branes. Fermions at different defects interact via exchange of massless (4+1)-dimensional fields. At we
Externí odkaz:
http://arxiv.org/abs/hep-th/0608149
We study a configuration of D-branes in string theory that is described at low energies by a four-dimensional field theory with a dynamically broken chiral symmetry. In a certain region of the parameter space of the brane configuration the low-energy
Externí odkaz:
http://arxiv.org/abs/hep-th/0604017
Autor:
Giveon, A., Kutasov, D.
Publikováno v:
JHEP0601:120,2006
We generalize the discussion of hep-th/0509170 to charged black holes. For the two dimensional charged black hole, which is described by an exactly solvable worldsheet theory, a transition from the black hole to the string phase occurs when the Hawki
Externí odkaz:
http://arxiv.org/abs/hep-th/0510211
Publikováno v:
Nucl.Phys. B719 (2005) 3-34
We show that string theory in AdS3 has two distinct phases depending on the radius of curvature R_{AdS}=\sqrt{k}l_s. For k>1 (i.e. R_{AdS}>l_s), the SL(2,C) invariant vacuum of the spacetime conformal field theory is normalizable, the high energy den
Externí odkaz:
http://arxiv.org/abs/hep-th/0503121
Autor:
Kutasov, D.
Unstable, non-BPS D-branes in weakly coupled ten dimensional string theory have many mysterious properties. Among other things, it is not clear what sets their tension, what is their relation to the better understood BPS D-branes, and why the open st
Externí odkaz:
http://arxiv.org/abs/hep-th/0408073
Autor:
Kutasov, D.
We use the Dirac-Born-Infeld action to study the real time dynamics of a $Dp$-brane propagating in the vicinity of $NS5$-branes. This problem is closely related to tachyon condensation on an unstable D-brane, with the role of the tachyon played by th
Externí odkaz:
http://arxiv.org/abs/hep-th/0405058
Autor:
Kutasov, D.
In four dimensional N=1 supersymmetric field theory it is often the case that the $U(1)_R$ current that becomes part of the superconformal algebra at the infrared fixed point is conserved throughout the renormalization group (RG) flow. We show that w
Externí odkaz:
http://arxiv.org/abs/hep-th/0312098
We consider two dimensional supergravity coupled to $\hat c=1$ matter. This system can also be interpreted as noncritical type 0 string theory in a two dimensional target space. After reviewing and extending the traditional descriptions of this class
Externí odkaz:
http://arxiv.org/abs/hep-th/0307195
Publikováno v:
JHEP 0206 (2002) 017
We study a quotient Conformal Field Theory, which describes a 3+1 dimensional cosmological spacetime. Part of this spacetime is the Nappi-Witten (NW) universe, which starts at a ``big bang'' singularity, expands and then contracts to a ``big crunch''
Externí odkaz:
http://arxiv.org/abs/hep-th/0204189