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• W3100291933 endingPage "1741005" @default.
• W3100291933 startingPage "1741005" @default.
• W3100291933 abstract "We review a nonstandard Big-Bang Nucleosynthesis (BBN) scenario within the minimal supersymmetric standard model, and propose an idea to solve both the [Formula: see text] and [Formula: see text] problems. Each problem is a discrepancy between the predicted abundance in the standard BBN and observed one. We focus on the stau, a supersymmetric partner of tau lepton, which is a long-lived charged particle when it is the next lightest supersymmetric particle and is degenerate in mass with the lightest supersymmetric particle. The long-lived stau forms a bound state with a nucleus, and provides nonstandard nuclear reactions. One of those, the internal conversion process, accelerates the destruction of [Formula: see text] and [Formula: see text], and leads to a solution to the [Formula: see text] problem. On the other hand, the bound state of the stau and [Formula: see text] enhances productions of n, D, T and [Formula: see text]. The over-production of [Formula: see text] could solve the [Formula: see text] problem; while the over-productions of D and T could conflict with observations, and hence the relevant parameter space of the stau is strictly constrained. We therefore need to carefully investigate the stau–[Formula: see text] bound state to find a condition of solving the [Formula: see text] problem. The scenario of the long-lived stau simultaneously and successfully fits the abundances of light elements (D, T, [Formula: see text], [Formula: see text], [Formula: see text] and [Formula: see text]) and the neutralino dark matter to the observed ones. Consequently, the parameter space both of the stau and the neutralino is determined with excellent accuracy." @default.
• W3100291933 created "2020-11-23" @default.
• W3100291933 creator A5007686843 @default.
• W3100291933 creator A5012773705 @default.
• W3100291933 creator A5050094286 @default.
• W3100291933 date "2017-08-01" @default.
• W3100291933 modified "2023-10-02" @default.
• W3100291933 title "A solution to lithium problem by long-lived stau" @default.
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• W3100291933 doi "https://doi.org/10.1142/s0218301317410051" @default.
• W3100291933 hasPublicationYear "2017" @default.
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