TY - JOUR
T1 - Impact of colored scalars on D0 - over(D, ̄)0 mixing in diquark models
AU - Chen, Chuan Hung
N1 - Funding Information:
This work is supported by the National Science Council of ROC under Grant No: NSC-97-2112-M-006-001-MY3 .
PY - 2009/9/21
Y1 - 2009/9/21
N2 - Inspired by the recent observation of the D0 - over(D, ̄)0 mixing, we explore the effects of colored scalars on the Δ C = 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 Δ mD 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.
AB - Inspired by the recent observation of the D0 - over(D, ̄)0 mixing, we explore the effects of colored scalars on the Δ C = 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 Δ mD 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.
UR - http://www.scopus.com/inward/record.url?scp=69949090567&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=69949090567&partnerID=8YFLogxK
U2 - 10.1016/j.physletb.2009.08.045
DO - 10.1016/j.physletb.2009.08.045
M3 - Article
AN - SCOPUS:69949090567
SN - 0370-2693
VL - 680
SP - 133
EP - 136
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
IS - 2
ER -