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| Auteurs principaux: | , , |
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| Format: | Preprint |
| Publié: |
2024
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| Accès en ligne: | https://arxiv.org/abs/2409.08178 |
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| _version_ | 1866909313470038016 |
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| author | Allahverdi, Rouzbeh Thompson, Adrian Zakeri, Mohammadreza |
| author_facet | Allahverdi, Rouzbeh Thompson, Adrian Zakeri, Mohammadreza |
| contents | Rare processes in laboratory and within astrophysical environments can be highly sensitive probes of baryon-number violating interactions at the TeV scale. We demonstrate the power of neutron stars to constrain baryon number violation by considering a minimal extension of the standard model involving a TeV-mass scalar mediator and a GeV scale Majorana fermion $ψ$. We find that a $ΔB = 2$ mass-loss process in binary pulsar systems via $n \to γψ$ and the subsequent scattering $ψn \to π^- K^+$ places stringent constraints on the model parameter space. These limits will become much stronger, due to the possibility of $Λ\rightarrow γψ$ decays at the tree level, if the neutron star equation of state is hyperonic. We compare these constraints with ongoing and future collider experiments, $n-\bar{n}$ oscillations, and dinucleon decay searches at future large-scale neutrino experiments, finding that the binary pulsars bounds on couplings are significantly tighter for specific flavor combinations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_08178 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Insights from Binary Pulsars and Laboratories into Baryon Number Violation: Implications for GeV Dark Matter Allahverdi, Rouzbeh Thompson, Adrian Zakeri, Mohammadreza High Energy Physics - Phenomenology Rare processes in laboratory and within astrophysical environments can be highly sensitive probes of baryon-number violating interactions at the TeV scale. We demonstrate the power of neutron stars to constrain baryon number violation by considering a minimal extension of the standard model involving a TeV-mass scalar mediator and a GeV scale Majorana fermion $ψ$. We find that a $ΔB = 2$ mass-loss process in binary pulsar systems via $n \to γψ$ and the subsequent scattering $ψn \to π^- K^+$ places stringent constraints on the model parameter space. These limits will become much stronger, due to the possibility of $Λ\rightarrow γψ$ decays at the tree level, if the neutron star equation of state is hyperonic. We compare these constraints with ongoing and future collider experiments, $n-\bar{n}$ oscillations, and dinucleon decay searches at future large-scale neutrino experiments, finding that the binary pulsars bounds on couplings are significantly tighter for specific flavor combinations. |
| title | Insights from Binary Pulsars and Laboratories into Baryon Number Violation: Implications for GeV Dark Matter |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2409.08178 |