Cosmic Positron Signature from Dark Matter in the Littlest Higgs Model with T-parity

Abstract

We calculate the flux of cosmic positrons from the dark matter annihilation in the littlest Higgs model with T-parity. The dark matter annihilates mainly into weak gauge bosons in the halo, and high energy positrons are produced through leptonic and hadronic decays of the bosons. We investigate a possibility to detect the positron signal in upcoming experiments such as PAMELA and AMS-02. We found that the dark matter signal can be distinguished from the background in the PAMELA experiment when the dark matter mass is less than 120 GeV and the signal flux is enhanced due to a small scale clustering of dark matter. Furthermore, the signal from the dark matter annihilation can be detected in the AMS-02 experiment, even if such enhancement does not exist. We also discuss the invisible width of the Higgs boson in this model.

31 pages, 11 figures Added appendix on constraints from electroweak precision measurements

References in corpus (1)

• The Role of Antimatter Searches in the Hunt for Supersymmetric Dark Matter

Cited by in corpus (18)

• High Energy Cosmic Rays from the Decay of Gravitino Dark Matter
• Hunting for the Top Partner in the Littlest Higgs Model with T-parity at the LHC
• Launch of the Space experiment PAMELA
• Lepton flavour violation in The Little Higgs model
• Unparticle Dark Matter
• Missing energy look-alikes with 100 pb-1 at the LHC
• A Weakly Coupled Ultraviolet Completion of the Littlest Higgs with T-parity
• Indirect Detection of Little Higgs Dark Matter
• Testing the Littlest Higgs Model with T-parity at the Large Hadron Collider
• LHC signals of T-odd heavy quarks in the Littlest Higgs model
• Distinguishing the Littlest Higgs model with T-parity from supersymmetry at the LHC using trileptons
• Antimatter cosmic rays from dark matter annihilation: First results from an N-body experiment
• Top quark chromomagnetic dipole moment in the littlest Higgs model with T-parity
• Pair production of the heavy leptons in future high energy linear e^{+}e^{-} colliders
• A comparison between the detection of gamma rays and positrons from neutralino annihilation
• Little Higgs model effects at $\gamma \gamma$ collider
• The impossibility of heavy neutrino dark matter in the Littlest Higgs Model with T-parity: constraints from direct search
• Associated production of the scalars and new gauge bosons from a little Higgs model at the LHC