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

来源：

CHINESE PHYSICS C | 2014年 / 38卷 / 10期

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

页数：8

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