Scattering of macroscopic heterotic strings

Abstract

We show that macroscopic heterotic strings, formulated as strings which wind around a compact direction of finite but macroscopic extent, exhibit non-trivial scattering at low energies. This occurs at order velocity squared and may thus be described as geodesic motion on a moduli space with a non-trivial metric which we construct. Our result is in agreement with a direct calculation of the string scattering amplitude. 5/93

On singularities of spherically symmetric backgrounds in string theory

“…Similar conclusion should apply also to the generalisations [20,21,22,23] of the FS model (2.13), in particular, to the following one (n = ±1) [12] …”

Exact solutions of closed string theory

“…Special cases of the model (6.2) include chiral plane waves (F = 1) and generalisations of the fundamental string solution, e.g., describing travelling waves along fundamental string, A i = 0, F −1 = 1 + M/r D−4 , K = K(u, x) (some of these solutions were originally found as the leading-order solutions of the string effective equations in [81,82,83,102]). In particular, in the u-independent spherically symmetric case K = a + b/r D−4 = a ′ + b ′ F −1 so that (redefining u and v) the action (6.2) can be put into the simple form…”

“…(2b) The extreme electric dilatonic (a = 1) D = 4 black hole [85,86] can be obtained [36] by dimensional reduction from a generalised D = 5 fundamental string model (found as a leading order solution in [83,102]) which is also an exact string solution [36,20].…”

Excitations of D-strings, entropy and duality

“…Evidence in favor of the identification of elementary BPS states of heterotic strings with extremal black holes has been also obtained in scattering processes of these states in [8] and [9] (in [9], as well as in [10] such black holes are obtained by compactifying macroscopic strings [11]), and in scattering of massless scalar states from such BPS states in [12] (where the inelastic thresholds are also examined).…”