Can induced Θ vacua be created in heavy-ion collisions?

被引:60
作者
Buckley, K [1 ]
Fugleberg, T [1 ]
Zhitnitsky, A [1 ]
机构
[1] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada
关键词
D O I
10.1103/PhysRevLett.84.4814
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We discuss a phenomenon important to the development of the early Universe which may be experimentally testable in heavy-ion collisions. An arbitrary induced theta vacuum state should be created in heavy-ion collisions, similar to the creation of the disoriented chiral condensate. It should be a large domain with a wrong theta(ind) not equal 0 orientation which will mimic the physics of the early Universe when it is believed that the fundamental parameter theta(fund) not equal 0. We test this idea numerically in a simple model where we study the evolution of the phases of the chiral condensates in QCD with two quark flavors with nonzero theta(ind) parameter. We see the formation of a nonzero theta(ind) vacuum on a time scale of 10(-23) s.
引用
收藏
页码:4814 / 4817
页数:4
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