Scalar Dark Matter Search at the LHC through FCNC Top Decay

Abstract

We discuss an extended standard model electroweak sector which contains a stable scalar dark matter particle, the D boson. To search for the D boson at the LHC we exploit the flavor-changing neutral current (FCNC) top quark decay, t->c D D, mediated by the lightest standard model-like Higgs h^0 in a two Higgs doublet model framework. The branching ratio for t->c D D in this case can be as high as 10^{-3}, after taking into account constraints arising from the D boson relic abundance. With an integrated luminosity of 10 (100) fb^{-1}, the 14 TeV LHC can explore values of this branching ratio that are one (two) order of magnitude smaller in t\bar{t} production with t\bar{t}\to c \bar{b} \ell^-(\bar{c}b\ell^+)+missing E_T. For a D boson mass <60 GeV, m_{h^0}< 2 M_Z, 10 fb^{-1} luminosity and a branching ratio BR(t->cDD)~10^{-4}, the estimated number of signal events at the 14 TeV LHC is of order 80.

14 pages, 5 figures, 1 table

References in corpus (15)

• Observation of an anomalous positron abundance in the cosmic radiation
• First results from DAMA/LIBRA and the combined results with DAMA/NaI
• Measurement of the Cosmic Ray e+ plus e- spectrum from 20 GeV to 1 TeV with the Fermi Large Area Telescope
• New results from DAMA/LIBRA
• Results from a Search for Light-Mass Dark Matter with a P-type Point Contact Germanium Detector
• LHC Phenomenology of an Extended Standard Model with a Real Scalar Singlet
• WIMP dark matter, Higgs exchange and DAMA
• The real singlet scalar dark matter model
• The Standard Model Higgs Boson-Inflaton and Dark Matter
• Gamma rays from the annihilation of singlet scalar dark matter
• Scalar Dark Matter Effects in Higgs and Top Quark Decays
• New Physics effects in the flavor-changing neutral couplings of the Top quark
• Light Higgs Boson, Light Dark Matter and Gamma Rays
• Type II Seesaw and the PAMELA/ATIC Signals
• Gauge-singlet dark matter in a left-right symmetric model with spontaneous CP violation

Cited by in corpus (14)

• Discovering Dark Matter Through Flavor Violation at the LHC
• Hints of Standard Model Higgs Boson at the LHC and Light Dark Matter Searches
• Dark matter and a suppression mechanism for neutrino masses in the Higgs triplet model
• Hidden Higgs Boson at the LHC and Light Dark Matter Searches
• Flavored Dark Matter: A Review
• Singlet Dark Matter in Type II Two Higgs Doublet Model
• Leptonic Monotops at LHC
• Two-Higgs-Doublet-Portal Dark-Matter Models in Light of Direct Search and LHC Data
• Quark-flavored scalar dark matter
• Scalar Dark Matter in Leptophilic Two-Higgs-Doublet Model
• Probing Radiative Neutrino Mass Generation through Monotop Production
• Missing particle associated with two bottom quarks at the LHC: Mono-$b$ versus 2$b$ with razor variables
• Search for pseudoscalar-mediated WIMPs in $t\to c$ transitions with missing energy
• Higgs-Portal Dark Matter in Nonlinear MSSM