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Abstract:
It is important to understand the implications of current observational constraints and potential signatureson the thermal historyof darkmatter. In this work, we build the connection between the present-dayvelocitiesandtheproductionmechanism ofdarkmatterandfindthatthecurrentobservationon structure formationcanbe imposed toconstrain the decoupling temperatures and the phase-space distributionof darkmatter.We further explore the potential ofdistinguishingdifferentpossible thermal histories of dark matter with hypothetical future observationaldata.Usingthefreeze-in/-outscenarios as templates,wefindthat futureprecisiondatamay uniquely identify the allowedparameter spaces for freeze-inandfreeze-out,orevencompletelyruleout one of the scenarios. This method can be more generallyappliedtootherscenarios.
About the speaker:
Dr. Fei Huang is a postdoc at theWeizmann Institute of Science. He receivedhisPhDintheoreticalhighenergyphysicsfromtheUniversityof Arizonain2019.HethenworkedasapostdocintheInstituteofTheoretical Physics,ChineseAcademyof Science, and theUniversityofCalifornia, Irvine from 2019 to 2022. His research focuses on dark-matter phenomenologyandearly-universecosmology.