Gravitational wave from dark sector with dark pion

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 WIM...

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Bibliographic Details
Published inJournal of cosmology and astroparticle physics Vol. 2017; no. 7; p. 44
Main Authors Tsumura, Koji, Yamada, Masatoshi, Yamaguchi, Yuya
Format Journal Article
LanguageEnglish
Published United States 25.07.2017
Subjects
ANNIHILATION
CHIRAL SYMMETRY
CHIRALITY
CROSS SECTIONS
DISTURBANCES
GRAVITATIONAL WAVES
NONLUMINOUS MATTER
PERTURBATION THEORY
PHASE TRANSFORMATIONS
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
PION-PION INTERACTIONS
PIONS
QUANTUM CHROMODYNAMICS
SCALE INVARIANCE
SPACE
SPECTRA
STANDARD MODEL
SYMMETRY BREAKING
WIMPS
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Summary: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.
ISSN:1475-7516
1475-7516
DOI:10.1088/1475-7516/2017/07/044