CP violation in D0 → (K- K+, π- π+) from diquarks

被引：18

作者：

Chen, Chuan-Hung ^{[1
,2
]}

Geng, Chao-Qiang ^{[2
,3
]}

Wang, Wei ^{[4
]}

机构：

[1] Natl Cheng Kung Univ, Dept Phys, Tainan 701, Taiwan

[2] Natl Ctr Theoret Sci, Hsinchu 300, Taiwan

[3] Natl Tsing Hua Univ, Dept Phys, Hsinchu 300, Taiwan

[4] Deutsch Elektronen Synchrotron DESY, D-22607 Hamburg, Germany

来源：

PHYSICAL REVIEW D | 2012年 / 85卷 / 07期

关键词：

MODELS;

D O I：

10.1103/PhysRevD.85.077702

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The explanation of the large CP asymmetries in D-0 -> (pi(+) pi(-), K+ K-) decays observed by the LHCb collaboration is likely to call for new physics beyond the Cabibbo-Kobayashi-Maskawa quark-mixing matrix (CKM) paradigm. We explore new contributions caused by the color sextet scalar diquark, and demonstrate that the diquark with the mass of order 1 TeV and nominal couplings with quarks can generate the CP asymmetries at the percent level. Using the experimental data on branching ratios and CP asymmetries of D-0 -> (pi(+) pi(-), K+ K-), we derive the constraints on the diquark mass and couplings, which can be further examined in hadron colliders in the dijet final states.

引用

页数：4

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