Probing Quadratically Coupled Ultralight Dark Matter with Pulsar Timing Arrays
Fuente:
arXiv
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| Autori principali: | , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866911722218979328 |
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| author | Gan, Xucheng Kim, Hyungjin Mitridate, Andrea |
| author_facet | Gan, Xucheng Kim, Hyungjin Mitridate, Andrea |
| contents | Ultralight dark matter may couple quadratically to Standard Model particles. Such quadratic interactions give rise to both coherent and stochastic signals in pulsar timing array (PTA) observations. In this work, we characterize these signals, including the effects of dark matter propagation in a finite-density medium, and assess the sensitivity of current and upcoming PTA observations to their detection. For coherent signals, we find that the sensitivity of current PTA observations competes with and sometimes exceeds that of other probes, such as equivalence principle tests and atomic clocks. For stochastic signals, we find that PTA sensitivities underperform equivalence principle constraints for both existing and upcoming PTA data sets. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_13945 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Probing Quadratically Coupled Ultralight Dark Matter with Pulsar Timing Arrays Gan, Xucheng Kim, Hyungjin Mitridate, Andrea High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics Ultralight dark matter may couple quadratically to Standard Model particles. Such quadratic interactions give rise to both coherent and stochastic signals in pulsar timing array (PTA) observations. In this work, we characterize these signals, including the effects of dark matter propagation in a finite-density medium, and assess the sensitivity of current and upcoming PTA observations to their detection. For coherent signals, we find that the sensitivity of current PTA observations competes with and sometimes exceeds that of other probes, such as equivalence principle tests and atomic clocks. For stochastic signals, we find that PTA sensitivities underperform equivalence principle constraints for both existing and upcoming PTA data sets. |
| title | Probing Quadratically Coupled Ultralight Dark Matter with Pulsar Timing Arrays |
| topic | High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2510.13945 |