Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-04-20
Physics
High Energy Physics
High Energy Physics - Phenomenology
18 pages, 5 figures
Scientific paper
We consider a scalar dark matter model, the SM4+D, consisting of the standard model with four generations (SM4) and a real gauge-singlet scalar called darkon, D, as the weakly interacting massive particle (WIMP) dark-matter (DM) candidate. We explore constraints on the darkon sector of the SM4+D from WIMP DM direct-search experiments, including CDMS II and CoGeNT, and from the decay of a B meson into a kaon plus missing energy. We find that a sizable portion of the darkon parameter space is still compatible with the experimental data. Since the darkon-Higgs interaction may give rise to considerable enhancement of the Higgs invisible decay mode, the existence of the darkon could lead to the weakening or evasion of some of the restrictions on the Higgs mass in the presence of fourth-generation quarks. In addition, it can affect the flavor-changing decays of these new heavy quarks into a lighter quark and the Higgs boson, as the Higgs may subsequently decay invisibly. Therefore we also study these flavor-changing neutral transitions involving the darkon, as well as the corresponding top-quark decay t -> cDD, some of which may be observable at the Tevatron or LHC and thus provide additional tests for the SM4+D.
He Xiao-Gang
Ho Shu-Yu
Tandean Jusak
Tsai Ho-Chin
No associations
LandOfFree
Scalar Dark Matter and Standard Model with Four Generations does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Scalar Dark Matter and Standard Model with Four Generations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Scalar Dark Matter and Standard Model with Four Generations will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-473199