Dark Light-Higgs Bosons

Patrick Draper, Tao Liu, Carlos E. M. Wagner, Lian-Tao Wang, and Hao Zhang

Phys. Rev. Lett. 106, 121805 – Published 24 March 2011

Abstract

We study a limit of the nearly Peccei-Quinn-symmetric next-to-minimal supersymmetric standard model possessing novel Higgs and dark matter (DM) properties. In this scenario, there naturally coexist three light singletlike particles: a scalar, a pseudoscalar, and a singlinolike DM candidate, all with masses of order 0.1–10 GeV. The decay of a standard model-like Higgs boson to pairs of the light scalars or pseudoscalars is generically suppressed, avoiding constraints from collider searches for these channels. For a certain parameter window annihilation into the light pseudoscalar and exchange of the light scalar with nucleons allow the singlino to achieve the correct relic density and a large direct-detection cross section consistent with the DM direct-detection experiments, CoGeNT and DAMA/LIBRA, preferred region simultaneously. This parameter space is consistent with experimental constraints from LEP, the Tevatron, $Υ$ , and flavor physics.

Received 14 October 2010

DOI:https://doi.org/10.1103/PhysRevLett.106.121805

Authors & Affiliations

Patrick Draper¹, Tao Liu^1,2, Carlos E. M. Wagner^1,3,4, Lian-Tao Wang⁵, and Hao Zhang^1,6

¹Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637, USA
²Department of Physics, University of California, Santa Barbara, California 93106, USA
³HEP Division, Argonne National Laboratory, 9700 Cass Avenue, Argonne, Illinois 60439, USA
⁴KICP and Department of Physics, University of Chicago, 5640 South Ellis Avenue, Chicago Illinois 60637, USA
⁵Department of Physics, Princeton University, Princeton, New Jersey 08540, USA
⁶Department of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China

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Vol. 106, Iss. 12 — 25 March 2011

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Images

Figure 1
Masses of $h_{1}$ (top left), $a_{1}$ (middle left), and $χ_{1}$ (bottom left); branching ratios of $h_{2}$ into $h_{1} h_{1}$ (top right) and $a_{1} a_{1}$ (middle right), and correlation between $ε$ and $ε^{'}$ (bottom right). Points are taken randomly from the ranges $5 \leq \tan β \leq 50$ , $0.05 \leq λ \leq 0.5$ , $0.0005 \leq κ \leq 0.05$ , $- 0.8 \leq ε^{'} \leq 0.8$ , $- 40 \leq A_{κ} \leq 0 GeV$ , and $0.1 \leq μ \leq 1 TeV$ . (As an illustration, we assume soft squark masses of 1 TeV, slepton masses of 200 GeV, $A_{u, d, e}$ parameters of 750 GeV, and bino, wino, and gluino masses of 100, 200, and 660 GeV, respectively, for all numerical analyses in this Letter.) Light gray (green) points cover the whole scan range, gray (red) points correspond to $λ < 0.30$ , $κ / λ < 0.05$ , and $μ < 400 GeV$ , and dark gray (blue) points correspond to $λ < 0.15$ , $κ / λ < 0.03$ , and $μ < 250 GeV$ .Reuse & Permissions
Figure 2
Constraints from the decays $h_{2} \to h_{1} h_{1} \to 4 f$ (top) and from the decays $Υ \to γ h_{1} (h_{1} \to μ μ, π π, K K)$ (bottom). $σ_{4 μ} \equiv σ_{h_{2}} Br (h_{2} \to h_{1} h_{1} \to 4 μ)$ . To show the constraint from the $2 μ 2 τ$ channel on the same plot we convert it into an effective constraint on $4 μ$ by rescaling it with $Br (h_{1} \to μ μ) / Br (h_{1} \to τ τ)$ (a model-independent quantity). $λ_{d}$ is a tree-level coupling of the down-type interaction $- (λ_{d} m_{f_{d}} / \sqrt{2} v) h_{1} {\bar{f}}_{d} f_{d}$ . Light gray and dark gray (blue) points correspond to the gray and dark gray (blue) points in Fig. 3. Purple bands correspond to the points in the scan of Fig. 4.Reuse & Permissions
Figure 3
Cross section of SI direct detection for $χ_{1}$ . The scan is over all parameters, in the ranges $0.05 \leq λ \leq 0.15$ , $0.001 \leq κ \leq 0.005$ , $| ε^{'} | \leq 0.25$ , $- 40 \leq A_{κ} \leq 0 GeV$ , $5 \leq \tan β \leq 50$ and $100 \leq μ \leq 250 GeV$ . The dark gray (blue) points have a relic density $0.09 \leq Ω h^{2} \leq 0.13$ . The gray (red) contour is the CoGeNT favored region presented in 16 and the two gray (light blue) dashed circles are the most recent interpretations of fitting $CoGeNT + DAMA / LIBRA$ [13]. All contours assume a local density which may be sensitive to the relic density. The dark gray (purple) dotted and dashed, gray (brown), and black lines are the limits from CDMS [17], CoGeNT [16], and XENON100 [18], respectively. Most CoGeNT favored regions have a tension with the CDMS constraints. Consistency between the CoGeNT preferred regions and the XENON100 constraints can be achieved within the scintillation-efficiency uncertainties of liquid xenon [13].Reuse & Permissions
Figure 4
Contours of $σ_{SI}$ (top left), $Ω h^{2}$ (top right), $m_{h_{1}}$ (left bottom), and $δ_{v_{χ_{1}} \to 0}$ (right bottom) on the $μ - \tan β$ plane, with $λ = 0.12$ , $κ = 2.7 \times 10^{- 3}$ , $ε^{'} = 0.15$ , and $A_{κ} = - 24 GeV$ .Reuse & Permissions

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