Stimulated Emission of Dark Matter via Thermal Scattering: Novel Limits for Freeze-In and eV Cold Dark Matter
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arXiv
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866929557394685952 |
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| author | Sakurai, Kodai Yin, Wen |
| author_facet | Sakurai, Kodai Yin, Wen |
| contents | Recently, one of the present authors noticed a stimulated emission process of bosonic dark matter via the two-body decay of a mother particle in a thermal plasma similar to the operation principle of a laser in 2301.08735. In this paper, we show that in a $2 \to 2$ process, including a bosonic final particle (e.g., an axion or dark photon), the stimulated emission occurs as well due to a small angle scattering of the thermal mother particles and thus the phenomenon is more universal. Two important conclusions follow: (1) Care must be taken when studying the freeze-in production of a bosonic dark matter, as the abundance and momentum distribution of dark matter can differ significantly due to this effect. (2) eV-mass-range bosonic dark matter is special and theoretically well-motivated because models for freeze-in or other thermal production of dark matter include the parameter region of cold eV dark matter. We also study the dark matter mass effect for the stimulated emission. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_18968 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Stimulated Emission of Dark Matter via Thermal Scattering: Novel Limits for Freeze-In and eV Cold Dark Matter Sakurai, Kodai Yin, Wen High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics Recently, one of the present authors noticed a stimulated emission process of bosonic dark matter via the two-body decay of a mother particle in a thermal plasma similar to the operation principle of a laser in 2301.08735. In this paper, we show that in a $2 \to 2$ process, including a bosonic final particle (e.g., an axion or dark photon), the stimulated emission occurs as well due to a small angle scattering of the thermal mother particles and thus the phenomenon is more universal. Two important conclusions follow: (1) Care must be taken when studying the freeze-in production of a bosonic dark matter, as the abundance and momentum distribution of dark matter can differ significantly due to this effect. (2) eV-mass-range bosonic dark matter is special and theoretically well-motivated because models for freeze-in or other thermal production of dark matter include the parameter region of cold eV dark matter. We also study the dark matter mass effect for the stimulated emission. |
| title | Stimulated Emission of Dark Matter via Thermal Scattering: Novel Limits for Freeze-In and eV Cold Dark Matter |
| topic | High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2410.18968 |