YANG-MILLS COSMOLOGIES AND COLLAPSING GRAVITATIONAL SPHALERONS

被引：35
作者：
GIBBONS, GW
STEIF, AR
机构：
[1] Department of Applied Mathematics and Theoretical Physics, Cambridge University, Cambridge, CB3 9EW, Silver Street
来源：
PHYSICS LETTERS B | 1994年 / 320卷 / 3-4期
关键词：
D O I：
10.1016/0370-2693(94)90652-1
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Cosmological solutions with a homogeneous Yang-Mills field which oscillates and passes between topologically distinct vacua are discussed. These solutions are used to model the collapsing Bartnik-McKinnon gravitational sphaleron and the associated anomalous production of fermions. The Dirac equation is analyzed in these backgrounds. It is shown explicitly that a fermion energy level crosses from the negative to positive energy spectrum as the gauge field evolves between the topologically distinct vacua. The cosmological solutions are also generalized to include an axion field.
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页码：245 / 252
页数：8
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