Scalar Dark Matter in light of LEP and ILC Experiments

Abstract

In this work we study a scalar field dark matter model with mass of the order of 100 MeV. We assume dark matter is produced in the process $e^{-}+e^{+}\to \varphi +{\varphi }^{\ast }+\gamma$, that, in fact, could be a background for the standard process $e^{-}+e^{+}\to \nu +\bar{\nu }+\gamma$ extensively studied at LEP. We constrain the chiral couplings, $C_L$ and $C_R$, of the dark matter with electrons through an intermediate fermion of mass $m_F=100$ GeV and obtain $C_L=0.1(0.25)$ and $C_R=0.25(0.1)$ for the best fit point of our ${\chi }^2$ analysis. We also analyze the potential of ILC to detect this scalar dark matter for two configurations: (i) center of mass energy $\sqrt{s}=500$ GeV and luminosity $\mathcal{L}=250$ fb${}^{-1}$, and (ii) center of mass energy $\sqrt{s}=1$ TeV and luminosity $\mathcal{L}=500$ fb${}^{-1}$. The differences of polarized beams are also explored to better study the chiral couplings.

15 pages, 6 figures and 1 table. New references added and improvements in the text. Conclusions unchanged

References in corpus (13)

• Dark Matter Results from 225 Live Days of XENON100 Data
• Gauge Singlet Scalars as Cold Dark Matter
• New results from DAMA/LIBRA
• Results from a Low-Energy Analysis of the CDMS II Germanium Data
• LEP Shines Light on Dark Matter
• Constraints on WIMP Dark Matter from the High Energy PAMELA $\bar{p}/p$ data
• The moment of truth for WIMP Dark Matter
• Dark Matter Complementarity and the Z${}^{\prime }$ Portal
• Direct Detection of Non-Chiral Dark Matter
• Illuminating Dark Matter at the ILC
• Lepton-Flavored Scalar Dark Matter with Minimal Flavor Violation
• Searching for Dark Matter at Hadron Colliders
• Discovering the Higgs Bosons of Minimal Supersymmetry with Tau Leptons and a Bottom Quark

Cited by in corpus (2)

• Scalar Dark Matter Candidates -- Revisited
• Is it possible to discover a dark matter particle with an accelerator?