Model for decoherence of entangled beauty

被引：28

作者：

Bertlmann, RA ^{[1
]}

Grimus, W ^{[1
]}

机构：

[1] Univ Vienna, Inst Theoret Phys, A-1090 Vienna, Austria

来源：

PHYSICAL REVIEW D | 2001年 / 64卷 / 05期

关键词：

D O I：

10.1103/PhysRevD.64.056004

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In the context of the entangled B-0(B) over bar (0) state produced at the Y(4S) resonance, we consider a modification of the usual quantum-mechanical time evolution with a dissipative term, which contains only one parameter denoted by lambda and respects complete positivity. In this way a decoherence effect is introduced in the time evolution of the two-particle B-0(B) over bar (0) state, which becomes stronger with increasing distance between the two particles. While our model of time evolution has decoherence for the two-particle system, we assume that, after the decay of one of the two B mesons, the resulting one-particle state obeys the purely quantum-mechanical time evolution. From the data on dilepton events we derive an upper bound on lambda. We also show how lambda is related to the so-called "decoherence parameter" zeta, which parametrizes decoherence in neutral flavored meson-antimeson systems.

引用

页数：5

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