scholarly journals Marginal deformations of tree-level  = 4 SYM from twistor string theory

2006 ◽  
Vol 54 (5-6) ◽  
pp. 423-429 ◽  
Author(s):  
M. Kulaxizi ◽  
K. Zoubos
Keyword(s):  
String Theory ◽  
Tree Level ◽  
Marginal Deformations ◽  
Twistor String Theory

scholarly journals STRING COSMOLOGY AND CHAOS

2004 ◽  
Vol 19 (10) ◽  
pp. 1499-1509
Author(s):  
THIBAULT DAMOUR
Keyword(s):  
String Theory ◽  
Coming Out ◽  
String Cosmology ◽  
Low Energy ◽  
Weyl Groups ◽  
Tree Level ◽  
Cosmological Solutions

We briefly review two aspects of string cosmology: (1) the presence of chaos in the generic cosmological solutions of the tree-level low-energy effective actions coming out of string theory, and (2) the remarkable link between the latter chaos and the Weyl groups of some hyperbolic Kac–Moody algebras.

scholarly journals ZERO MODE DIVERGENCE PROBLEM IN STRING THEORY

1994 ◽  
Vol 09 (23) ◽  
pp. 2113-2122
Author(s):  
MAKOTO NATSUUME
Keyword(s):  
String Theory ◽  
Zero Mode ◽  
Wave Packets ◽  
Tree Level ◽  
Formal Schemes ◽  
Divergence Problem ◽  
Formal Procedures

For 2D string theory, the perturbative S-matrices are not well-defined due to a zero mode divergence. Although there exist formal procedures to make the integral convergent, their physical meanings are not clear. We describe a method to obtain finite S-matrices physically to justify the formal schemes. The scheme uses asymptotic states by wave packets which fall faster than exponentials. It is shown that the scheme gives well-defined S-matrices and justifies the formal shifted Virasoro-Shapiro amplitude for simple processes. The tree-level unitarity for these processes is also shown. We point out a problem in this scheme.

scholarly journals Conformal Supergravity in Twistor-String Theory

2004 ◽  
Vol 2004 (08) ◽  
pp. 009-009 ◽  
Author(s):  
Nathan Berkovits ◽  
Edward Witten
Keyword(s):  
String Theory ◽  
Conformal Supergravity ◽  
Twistor String Theory

scholarly journals OPEN-CLOSED DUALITY: LESSONS FROM MATRIX MODEL

2004 ◽  
Vol 19 (11) ◽  
pp. 841-853 ◽  
Author(s):  
ASHOKE SEN
Keyword(s):  
Field Theory ◽  
String Theory ◽  
Matrix Model ◽  
String Field Theory ◽  
Classical Result ◽  
Open String ◽  
Closed String ◽  
Tree Level ◽  
Two Dimensional

Recent investigations involving the decay of unstable D-branes in string theory suggest that the tree level open string theory which describes the dynamics of the D-brane already knows about the closed string states produced in the decay of the brane. We propose a specific conjecture involving quantum open string field theory to explain this classical result, and show that the recent results in two-dimensional string theory are in exact accordance with this conjecture.

scholarly journals Tree and loop amplitudes in open twistor string theory

2007 ◽  
Vol 2007 (06) ◽  
pp. 005-005 ◽  
Author(s):  
Louise Dolan ◽  
Peter Goddard
Keyword(s):  
String Theory ◽  
Loop Amplitudes ◽  
Twistor String Theory
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