Constraints on unparticle interactions from particle and antiparticle oscillations

被引：16

作者：

Chen, Shao-Long ^{[1
,2
]}

He, Xiao-Gang ^{[1
,2
,3
]}

Li, Xue-Qian ^{[3
]}

Tsai, Ho-Chin ^{[1
,2
]}

Wei, Zheng-Tao ^{[3
]}

机构：

[1] Natl Taiwan Univ, Dept Phys, Taipei, Taiwan

[2] Natl Taiwan Univ, Ctr Theoret Sci, Taipei, Taiwan

[3] Nankai Univ, Dept Phys, Tianjin 300071, Peoples R China

来源：

EUROPEAN PHYSICAL JOURNAL C | 2009年 / 59卷 / 04期

关键词：

MUONIUM; CONVERSION; PHYSICS; SEARCH;

D O I：

10.1140/epjc/s10052-008-0823-z

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：

Unparticles have dramatic effects on particle and antiparticle oscillations in meson-antimeson and muonium-antimuonium systems. Unlike the usual tree-level contributions to meson oscillations from heavy-particle exchange, which results in a small Gamma(12), the unparticle may have sizeable contributions to both M-12 and Gamma(12) due to the fractional dimension d(u) of the unparticle. If the unparticle effect dominates the contributions (which may happen in D-0-(D) over bar (0) mixing) to the meson mixing parameters x and y, we find that x/y = cot(pi d(u)). The mass difference Delta m in meson mixing can provide interesting constraints on the unparticle interactions. The unparticle interaction can significantly enhance the CP asymmetry in meson mixing, which can be tested in more accurate experiments in the future. Interesting constraints on unparticle and particle interactions can also be obtained using muonion and antimuonion oscillation data.

引用

页码：899 / 906

页数：8

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