UNSTABLE PARTICLES IN FINITE VOLUME - THE BROKEN PHASE OF THE 4-D O(4) NONLINEAR SIGMA-MODEL

被引：8
|
作者：
ZIMMERMANN, F
WESTPHALEN, J
GOCKELER, M
KASTRUP, HA
机构：
[1] RHEIN WESTFAL TH AACHEN, INST THEORET PHYS E, W-5100 AACHEN, GERMANY
[2] FORSCHUNGSZENTRUM JULICH, HLRZ, W-5170 JULICH 1, GERMANY
来源：
NUCLEAR PHYSICS B | 1993年
关键词：
D O I：
10.1016/0920-5632(93)90347-9
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：
According to a proposal of Luscher it is possible to determine elastic scattering phases in infinite volume from the energy spectrum of two-particle states in a periodic box. We demonstrate the applicability of this method in the broken phase of the 4-dimensional O(4) non-linear sigma-model in a Monte-Carlo study on finite lattices. This non-perturbative approach also permits the study of unstable particles, the sigma-particle in our case. We observe the sigma-resonance and extract its mass and its width.
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页码：879 / 882
页数：4
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