Leptogenesis driven by majoron
Fuente:
arXiv
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| Autori principali: | , |
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| Natura: | Preprint |
| Pubblicazione: |
2023
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| _version_ | 1866913332507705344 |
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| author | Chun, Eung Jin Jung, Tae Hyun |
| author_facet | Chun, Eung Jin Jung, Tae Hyun |
| contents | We propose a leptogenesis scenario where baryon asymmetry generation is assisted by the kinetic motion of the majoron, $J$, in the process of lepton-number violating inverse decays of a right-handed neutrino, $N$. We investigate two distinct scenarios depending on the sources of majoron kinetic motion: 1) the misalignment mechanism, and 2) the kinetic misalignment mechanism. The former case can naturally generate the observed baryon asymmetry for the majoron mass $m_J \gtrsim \,{\rm TeV}$ and the right-handed neutrino's mass $M_{N} \gtrsim 10^{11}\,{\rm GeV}$. However, an additional decay channel of the majoron is required to avoid the overclosure problem of the majoron oscillation. The later scenario works successfully for $m_J \lesssim 100\,{\rm keV}$, and $M_{N} \lesssim 10^9\,{\rm GeV}$ while $M_N$ can be even far below the temperature of the electroweak phase transition as long as sufficiently large kinetic misalignment is provided. We also find that a sub-$100\,{\rm keV}$ majoron is a viable candidate for dark matter. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2311_09005 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Leptogenesis driven by majoron Chun, Eung Jin Jung, Tae Hyun High Energy Physics - Phenomenology We propose a leptogenesis scenario where baryon asymmetry generation is assisted by the kinetic motion of the majoron, $J$, in the process of lepton-number violating inverse decays of a right-handed neutrino, $N$. We investigate two distinct scenarios depending on the sources of majoron kinetic motion: 1) the misalignment mechanism, and 2) the kinetic misalignment mechanism. The former case can naturally generate the observed baryon asymmetry for the majoron mass $m_J \gtrsim \,{\rm TeV}$ and the right-handed neutrino's mass $M_{N} \gtrsim 10^{11}\,{\rm GeV}$. However, an additional decay channel of the majoron is required to avoid the overclosure problem of the majoron oscillation. The later scenario works successfully for $m_J \lesssim 100\,{\rm keV}$, and $M_{N} \lesssim 10^9\,{\rm GeV}$ while $M_N$ can be even far below the temperature of the electroweak phase transition as long as sufficiently large kinetic misalignment is provided. We also find that a sub-$100\,{\rm keV}$ majoron is a viable candidate for dark matter. |
| title | Leptogenesis driven by majoron |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2311.09005 |