Dilute D-instantons at finite temperature

被引:14
作者
Barbon, JLF
VazquezMozo, MA
机构
[1] INST ADV STUDY, PRINCETON, NJ 08540 USA
[2] UNIV BASQUE COUNTRY, DEPT FIS TEOR, E-48080 BILBAO, SPAIN
关键词
superstring; D-branes; D-instantons; string thermodynamics; Hagedon transition; non-perturbative string effects; type IIB;
D O I
10.1016/S0550-3213(97)00256-3
中图分类号
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号
摘要
We discuss Dirichlet instanton effects on type-IIB string thermodynamics. We review some general properties of dilute D-instanton gases and use the low-energy supergravity solutions to define the normalization of the instanton measure, as well as the effects of long-range interactions. Thermal singularities in the single-instanton sector are due to tachyonic winding modes of Dirichlet open strings, Purely bosonic D-instantons induce in this way hard infrared singularities that ruin the weak-coupling expansion in the microcanonical ensemble, However, type-IIB D-instantons give smooth contributions at the Hagedorn temperature, and the induced mass and coupling of the axion field are insufficient to change the first-order character of the phase transition in the mean field approximation. (C) 1997 Elsevier Science B.V.
引用
收藏
页码:236 / 274
页数:39
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