Oscillations of neutrinos and mesons in quantum field theory

被引:209
作者
Beuthe, M [1 ]
机构
[1] Catholic Univ Louvain, Inst Phys Theor, B-1348 Louvain, Belgium
来源
PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS | 2003年 / 375卷 / 2-3期
关键词
oscillation; neutrino; meson; quantum field theory;
D O I
10.1016/S0370-1573(02)00538-0
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
This report deals with the quantum field theory of particle oscillations in vacuum. We first review the various controversies regarding quantum-mechanical derivations of the oscillation formula, as well as the different field-theoretical approaches proposed to settle them. We then clear up the contradictions between the existing field-theoretical treatments by a thorough study of the external wave packet model. In particular, we show that the latter includes stationary models as a subcase. In addition, we explicitly compute decoherence terms, which destroy interferences, in order to prove that the coherence length can be increased without bound by more accurate energy measurements. We show that decoherence originates not only in the width and in the separation of wave packets, but also in their spreading through space-time. In this review, we neither assume the relativistic limit nor the stability of oscillating particles, so that the oscillation formula derived with field-theoretical methods can be applied not only to neutrinos but also to neutral K and B mesons. Finally, we discuss oscillations of correlated particles in the same framework. (C) 2002 Elsevier Science B.V.. All rights reserved.
引用
收藏
页码:105 / 218
页数:114
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