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Title: 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.

Authors:
; ;  [1];  [2];  [1]
  1. Theory Group, KEK, Oho 1-1 Tsukuba, 305-0801 (Japan)
  2. (Sokendai), Oho 1-1 Tsukuba, 305-0801 (Japan)
Publication Date:
OSTI Identifier:
21020130
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 75; Journal Issue: 6; Other Information: DOI: 10.1103/PhysRevD.75.063506; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ANNIHILATION; COSMIC POSITRONS; GEV RANGE; HADRONIC PARTICLE DECAY; HIGGS BOSONS; HIGGS MODEL; LEPTONIC DECAY; NONLUMINOUS MATTER; PARITY; PARTICLE IDENTIFICATION; PARTICLE WIDTHS; REST MASS

Citation Formats

Asano, Masaki, Okada, Nobuchika, Okada, Yasuhiro, The Graduate University for Advanced Studies, and Matsumoto, Shigeki. Cosmic positron signature from dark matter in the littlest Higgs model with T parity. United States: N. p., 2007. Web. doi:10.1103/PHYSREVD.75.063506.
Asano, Masaki, Okada, Nobuchika, Okada, Yasuhiro, The Graduate University for Advanced Studies, & Matsumoto, Shigeki. Cosmic positron signature from dark matter in the littlest Higgs model with T parity. United States. doi:10.1103/PHYSREVD.75.063506.
Asano, Masaki, Okada, Nobuchika, Okada, Yasuhiro, The Graduate University for Advanced Studies, and Matsumoto, Shigeki. Thu . "Cosmic positron signature from dark matter in the littlest Higgs model with T parity". United States. doi:10.1103/PHYSREVD.75.063506.
@article{osti_21020130,
title = {Cosmic positron signature from dark matter in the littlest Higgs model with T parity},
author = {Asano, Masaki and Okada, Nobuchika and Okada, Yasuhiro and The Graduate University for Advanced Studies and Matsumoto, Shigeki},
abstractNote = {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.},
doi = {10.1103/PHYSREVD.75.063506},
journal = {Physical Review. D, Particles Fields},
number = 6,
volume = 75,
place = {United States},
year = {Thu Mar 15 00:00:00 EDT 2007},
month = {Thu Mar 15 00:00:00 EDT 2007}
}