2009/02/28 by Chuan-Hung Chen
Mathematics · Physics and Astronomy · #Colored #Combinatorics #Diquark #Geometry #High-Energy Particle Collisions Research #Homogeneous space #Materials science #Mathematics #Mixing (physics) #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum mechanics #Tree (set theory) #hep-ex #hep-ph
paper · pdf · doi:10.1016/j.physletb.2009.08.045
published as Phys.Lett.B680:133-136,2009 · 11 pages, 3 figures, references added, final version to appear PLB
arxiv created 2009/08/26 · openalex publication_date 2009/08/29 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Inspired by the recent observation of the D0–D¯0 mixing, we explore the effects of colored scalars on the ΔC=2 process in diquark models. As an illustration, we investigate the diquarks with the quantum numbers of (6,1,1/3) and (6,1,4/3) under SU(3)C×SU(2)L×U(1)Y gauge symmetries, which contribute to the process at one-loop and tree levels, respectively. We show that ΔmD gives the strongest constraint on the free parameters. In addition, we find that the small couplings can be naturally interpreted by the suppressed flavor mixings if the diquark of (6,1,4/3) only couples to the third generation.