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

Chuan Hung Chen, Chao Qiang Geng, Wei Wang

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)


The explanation of the large CP asymmetries in D0→(π +π -,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 D0→(π +π -,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.

Original languageEnglish
Article number077702
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number7
Publication statusPublished - 2012 Apr 18

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)


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