Searching for new physics in D0 → μ+μ-, e+e-, μ±e∓ at BES and/or the super charm-tau factory

被引:3
|
作者
Jia Lian-Bao [1 ]
Zhao Ming-Gang [1 ]
Ke Hong-Wei [2 ]
Li Xue-Qian [1 ]
机构
[1] Nankai Univ, Sch Phys, Tianjin 300071, Peoples R China
[2] Tianjin Univ, Sch Phys, Tianjin 300072, Peoples R China
基金
中国国家自然科学基金;
关键词
unparticle; non-universal Z '; leptonic rare decay; FCNC; BSM; CHANGING NEUTRAL CURRENTS; CURRENT DECAY; UPPER LIMITS; RARE; CONSTRAINTS;
D O I
10.1088/1674-1137/38/10/103101
中图分类号
O57 [原子核物理学、高能物理学];
学科分类号
070202 ;
摘要
In contrast with B-0-(B) over bar (0), B-s-(B) over bar (s) mixing where the standard model (SM) contributions overwhelm that of the new physics beyond standard model (BSM), a measured relatively large D-0-(D) over bar (0) mixing where the SM contribution is negligible, definitely implies the existence of the new physics BSM. It is natural to consider that the rare decays of D meson might be more sensitive to new phYsics, and the decay mode D-0 ->mu(+)mu(-) could be an ideal area to search for new physics because it is a flavor changing process. In this work we look for a trace of the new physics BSM in the leptonic decays of D-0. Concretely we discuss the contributions of unparticle or an extra gauge boson Z' while imposing the constraints set by fitting the D-0-(D) over bar (0) mixing data. We find that the long-distance SM effects for D-0-ll still exceed those contributions of the BSM under consideration, but for a double-flavor changing process such as D-0 ->mu(+/-)e(-/+), the new physics contribution would be significant.
引用
收藏
页数:8
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