Gravitational wave from dark sector with dark pion

Koji Tsumura, Masatoshi Yamada, Yuya Yamaguchi

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

In this work, we investigate the spectra of gravitational waves produced by chiral symmetry breaking in dark quantum chromodynamics (dQCD) sector. The dark pion (π) can be a dark matter candidate as weakly interacting massive particle (WIMP) or strongly interacting massive particle (SIMP). For a WIMP scenario, we introduce the dQCD sector coupled to the standard model (SM) sector with classical scale invariance and investigate the annihilation process of the dark pion via the 2π 2 SM process. For a SIMP scenario, we investigate the 3π 2π annihilation process of the dark pion as a SIMP using chiral perturbation theory. We find that in the WIMP scenario the gravitational wave background spectra can be observed by future space gravitational wave antennas. On the other hand, when the dark pion is the SIMP dark matter with the constraints for the chiral perturbative limit and pion-pion scattering cross section, the chiral phase transition becomes crossover and then the gravitational waves are not produced.

Original languageEnglish
Article number044
JournalJournal of Cosmology and Astroparticle Physics
Volume2017
Issue number7
DOIs
Publication statusPublished - Jan 1 2017

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gravitational waves
pions
sectors
weakly interacting massive particles
dark matter
quantum chromodynamics
gravitational wave antennas
scattering cross sections
invariance
broken symmetry
crossovers
perturbation theory

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics

Cite this

Gravitational wave from dark sector with dark pion. / Tsumura, Koji; Yamada, Masatoshi; Yamaguchi, Yuya.

In: Journal of Cosmology and Astroparticle Physics, Vol. 2017, No. 7, 044, 01.01.2017.

Research output: Contribution to journalArticle

Tsumura, Koji ; Yamada, Masatoshi ; Yamaguchi, Yuya. / Gravitational wave from dark sector with dark pion. In: Journal of Cosmology and Astroparticle Physics. 2017 ; Vol. 2017, No. 7.
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