Sample interview questions: How do you approach the problem of dark matter candidates within the framework of string theory?
Sample answer:
Approaching Dark Matter Candidates in String Theory
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Identify Candidate Particles: String theory predicts a vast spectrum of particles, including stable, neutral particles that could potentially constitute dark matter. Candidate particles include axions, moduli, and Kaluza-Klein excitations.
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Impose Constraints: Experimental observations and theoretical requirements provide constraints on potential dark matter candidates. For example, candidates must have the correct mass range, interact weakly with ordinary matter, and not overproduce certain decay products.
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Model Building: String theory allows for the construction of explicit models that describe the properties of dark matter candidates. These models incorporate additional symmetries or auxiliary fields to generate the desired properties.
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Phenomenological Studies: The predicted properties of dark matter candidates can be compared to observational data from astrophysical phenomena, such as galaxy rotation curves, gravitational lensing, and cosmic microwave background measurements. This can help to rule out certain candidates or constrain their parameters.
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Collider Searches: Some dark matter candidates, such as axions, can potentially be detected in hi… Read full answer