منابع مشابه
From UV/IR mixing to closed strings
It was shown in hep-th/0301099 that the leading UV/IR mixing effects in noncommutative gauge theories on D-branes are able to capture information about the closed string spectrum of the parent string theory. The analysis was carried out for D-branes on nonsupersymmetric C3/ZN orbifolds of Type IIB. In this paper we consider D-branes on twisted circles compactifications of Type II string theory....
متن کاملClosed strings from nothing
We study the physics of open strings in bosonic and type II string theories in the presence of unstable D-branes. When the potential energy of the open string tachyon is at its minimum, Sen has argued that only closed strings remain in the perturbative spectrum. We explore the scenario of Yi and of Bergman, Hori and Yi, who argue that the open string degrees of freedom are strongly coupled and ...
متن کاملUV/IR Mixing via Closed Strings and Tachyonic Instabilities
We discuss UV/IR mixing effects in non-supersymmetric noncommutative U(N) gauge theories. We show that the singular (nonplanar) terms in the 2and 3-point functions, namely the poles and the logarithms, can be obtained from a manifestly gauge invariant effective action. The action, which involves open Wilson line operators, can be derived from closed strings exchange between two stacks of Dbrane...
متن کاملTwisted Open Strings from Closed Strings: The WZW Orientation Orbifolds
Including world-sheet orientation-reversing automorphisms ĥσ ∈ H− in the orbifold program, we construct the operator algebras and twisted KZ systems of the general WZW orientation orbifold Ag(H−)/H−. We find that the orientation-orbifold sectors corresponding to each ĥσ ∈ H− are twisted open WZW strings, whose properties are quite distinct from conventional open-string orientifold sectors. As s...
متن کاملClosed strings from decaying D-branes
We compute the emission of closed string radiation from homogeneous rolling tachyons. For an unstable decaying Dp-brane the radiated energy is infinite to leading order for p ≤ 2 and finite for p > 2. The closed string state produced by a decaying brane is closely related to the state produced by D-instantons at a critical Euclidean distance from t = 0. In the case of a D0 brane one can cutoff ...
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ژورنال
عنوان ژورنال: Journal of High Energy Physics
سال: 2003
ISSN: 1029-8479
DOI: 10.1088/1126-6708/2003/09/033