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20,679
NonSupersymmetric String Theory
, 904
"... A class of nonsupersymmetric string backgrounds can be constructed using twists that involve spacetime fermion parity. We propose a nonperturbative definition of string theory in these backgrounds via gauge theories with supersymmetry softly broken by twisted boundary conditions. The perturbative ..."
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A class of nonsupersymmetric string backgrounds can be constructed using twists that involve spacetime fermion parity. We propose a nonperturbative definition of string theory in these backgrounds via gauge theories with supersymmetry softly broken by twisted boundary conditions
The Existence of Supersymmetric String Theory with Torsion
, 2005
"... ... Strominger and Witten took the matric product of a maximal symmetric four dimensional spacetime M with a six dimensional Calabi–Yau vacua X as the ten dimensional spacetime; they identified the Yang–Mills connection with the SU(3) connection of the Calabi– Yau metric and set the dilaton to be a ..."
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Cited by 51 (5 self)
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constant. To make this theory compatible with the standard grand unified field theory, Witten [28] and Horava–Witten [20] proposed to use higher rank bundles for strong coupled heterotic string theory so that the gauge groups can be SU(4) or SU(5). Mathematically, this approach relies on Uhlenbeck
Walls of Marginal Stability and Dyon Spectrum in N = 4 Supersymmetric String Theories
, 2007
"... The spectrum of quarter BPS dyons in N = 4 supersymmetric string theories can change as the asymptotic moduli cross walls of marginal stability on which the dyon can break apart into a pair of half BPS states. In this paper we classify these marginal stability walls and examine this phenomenon in th ..."
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Cited by 23 (14 self)
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The spectrum of quarter BPS dyons in N = 4 supersymmetric string theories can change as the asymptotic moduli cross walls of marginal stability on which the dyon can break apart into a pair of half BPS states. In this paper we classify these marginal stability walls and examine this phenomenon
hepth/9505054 Maximally Supersymmetric String Theories in D<10
, 1995
"... The existence of maximally supersymmetric solutions to heterotic string theory that are not toroidal compactifications of the tendimensional superstring is established. We construct an exact fermionic realization of an N=1 supersymmetric string theory in D=8 with nonsimplylaced gauge group Sp(20) ..."
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The existence of maximally supersymmetric solutions to heterotic string theory that are not toroidal compactifications of the tendimensional superstring is established. We construct an exact fermionic realization of an N=1 supersymmetric string theory in D=8 with nonsimplylaced gauge group Sp(20
Strong/weak coupling duality relations for nonsupersymmetric string theories
 Nucl. Phys. B
, 1998
"... Both the supersymmetric SO(32) and E8 × E8 heterotic strings in ten dimensions have known strongcoupling duals. However, it has not been known whether there also exist strongcoupling duals for the nonsupersymmetric heterotic strings in ten dimensions. In this paper, we construct explicit openstr ..."
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Cited by 21 (0 self)
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duals for the circlecompactifications of several of these nonsupersymmetric theories, among them the tachyonfree SO(16) × SO(16) string. Our method involves the construction of heterotic and openstring interpolating models that continuously connect nonsupersymmetric strings to supersymmetric
Negative discriminant states in N = 4 supersymmetric string theories
"... Single centered BPS black hole solutions exist only when the charge carried by the black hole has positive discriminant. On the other hand the exact dyon spectrum in heterotic string theory compactified on T 6 is known to contain states with negative discriminant. We show that all of these negative ..."
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Single centered BPS black hole solutions exist only when the charge carried by the black hole has positive discriminant. On the other hand the exact dyon spectrum in heterotic string theory compactified on T 6 is known to contain states with negative discriminant. We show that all of these negative
hepth/0702141 Walls of Marginal Stability and Dyon Spectrum in N = 4 Supersymmetric String Theories
, 2007
"... The spectrum of quarter BPS dyons in N = 4 supersymmetric string theories can change as the asymptotic moduli cross walls of marginal stability on which the dyon can break apart into a pair of half BPS states. In this paper we classify these marginal stability walls and examine this phenomenon in th ..."
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The spectrum of quarter BPS dyons in N = 4 supersymmetric string theories can change as the asymptotic moduli cross walls of marginal stability on which the dyon can break apart into a pair of half BPS states. In this paper we classify these marginal stability walls and examine this phenomenon
BPS Spectra and NonPerturbative Gravitational Couplings in N=2,4 Supersymmetric String Theories
, 1995
"... We study the BPS spectrum in D = 4; N = 4 heterotic string compactifications, with some emphasis on intermediate N = 4 BPS states. These intermediate states, which can become short in N = 2 compactifications, are crucial for establishing an S \Gamma T exchange symmetry in N = 2 compactifications. We ..."
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Cited by 8 (0 self)
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We study the BPS spectrum in D = 4; N = 4 heterotic string compactifications, with some emphasis on intermediate N = 4 BPS states. These intermediate states, which can become short in N = 2 compactifications, are crucial for establishing an S \Gamma T exchange symmetry in N = 2 compactifications
hepth/0504005 Black Holes and the Spectrum of HalfBPS States in N=4 Supersymmetric String Theory
, 2005
"... The entropy of a halfBPS black hole in N = 4 supersymmetric heterotic string compactification is independent of the details of the charge vector and is a function only of the norm of the charge vector calculated using the appropriate Lorenzian metric. Thus in order for this to agree with the degene ..."
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The entropy of a halfBPS black hole in N = 4 supersymmetric heterotic string compactification is independent of the details of the charge vector and is a function only of the norm of the charge vector calculated using the appropriate Lorenzian metric. Thus in order for this to agree
hepth/9512129 BPS Spectra and NonPerturbative Gravitational Couplings in N = 2, 4 Supersymmetric String Theories
, 1995
"... We study the BPS spectrum in D = 4, N = 4 heterotic string compactifications, with some emphasis on intermediate N = 4 BPS states. These intermediate states, which can become short in N = 2 compactifications, are crucial for establishing an S − T exchange symmetry in N = 2 compactifications. We disc ..."
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We study the BPS spectrum in D = 4, N = 4 heterotic string compactifications, with some emphasis on intermediate N = 4 BPS states. These intermediate states, which can become short in N = 2 compactifications, are crucial for establishing an S − T exchange symmetry in N = 2 compactifications. We
Results 1  10
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20,679