QUANTUM CONSERVED-CURRENTS IN AFFINE TODA THEORIES

被引:19
作者
DELIUS, GW
GRISARU, MT
ZANON, D
机构
[1] UNIV MILAN, DIPARTIMENTO FIS, I-20122 MILAN, ITALY
[2] INFN, I-20133 MILAN, ITALY
基金
美国国家科学基金会;
关键词
D O I
10.1016/0550-3213(92)90103-I
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 study the renormalization and conservation at the quantum level of higher-spin currents in affine Toda theories with particular emphasis on the nonsimply laced cases. For specific examples, namely the spin-3 current for the a3(2) and c2(1) theories, we prove conservation to all-loop order, thus establishing the existence of factorized S-matrices. For these theories, as well as the simply laced a2(1) theory, we compute one-loop corrections to the corresponding higher-spin charges and study charge conservation for the three-particle vertex function. For the a3(2) theory we show that although the current is conserved, anomalous threshold singularities spoil the conservation of the corresponding charge for the on-shell vertex function, implying a breakdown of some of the bootstrap procedures commonly used in determining the exact S-matrix.
引用
收藏
页码:307 / 328
页数:22
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