UNITARY STRING AMPLITUDES

被引：31

作者：

BERERA, A

机构：

[1] UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720

[2] LAWRENCE BERKELEY LAB,DIV PHYS,THEORET PHYS GRP,BERKELEY,CA 94720

来源：

NUCLEAR PHYSICS B | 1994年 / 411卷 / 01期

关键词：

D O I：

10.1016/0550-3213(94)90057-4

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：

The scattering amplitudes of string theory are divergent when the Riemann surface has a particular degeneracy associated with loops becoming infinitely long. These divergences originate from multiparticle intermediate states. The string amplitudes do not have the imaginary part required by unitarity. We give a prescription for defining string amplitudes that extends to all tachyon-free string theories. Explicit applications of our procedure are given at one-loop level for the Green-Schwarz and Neveu-Schwarz-Ramond theories. Our procedure is valid for higher loops also. However, only some simple features for this situation are explicitly discussed.

引用

页码：157 / 180

页数：24

共 8 条

[1] BORN EXPANSION TO ALL ORDERS FOR THE HETEROTIC STRING [J].