Dark Matter with Density-dependent Interactions

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dc.contributor.authorBoddy, Kimberly K
dc.contributor.authorCarroll, Sean M
dc.contributor.authorTrodden, Mark
dc.date2023-05-17T07:40:49.000
dc.date.accessioned2023-05-23T00:24:12Z
dc.date.available2023-05-23T00:24:12Z
dc.date.issued2012-12-28
dc.date.submitted2013-01-31T08:27:42-08:00
dc.description.abstractThe decay and annihilation cross sections of dark matter particles may depend on the value of a chameleonic scalar field that both evolves cosmologically and takes different values depending on the local matter density. This possibility introduces a separation between the physics relevant for freeze-out and that responsible for dynamics and detection in the late universe. We investigate how such dark sector interactions might be implemented in a particle physics Lagrangian and consider how current and upcoming observations and experiments bound such dark matter candidates. A specific simple model allows for an increase in the annihilation cross section by a factor of 106 between freeze-out and today, while more complicated models should also allow for scattering cross sections near the astrophysical bounds.
dc.description.commentsBoddy, K. K., Carroll, S. M., & Trodden, M. (2012). Dark Matter with Density-dependent Interactions. Physical Review D, 86(12), 123529. doi: http://dx.doi.org/10.1103/PhysRevD.86.123529 © 2012 American Physical Society
dc.identifier.urihttps://repository.upenn.edu/handle/20.500.14332/42974
dc.legacy.articleid1267
dc.legacy.fieldstrue
dc.legacy.fulltexturlhttps://repository.upenn.edu/cgi/viewcontent.cgi?article=1267&context=physics_papers&unstamped=1
dc.source.issue272
dc.source.journalDepartment of Physics Papers
dc.source.peerreviewedtrue
dc.source.statuspublished
dc.subject.otherPhysical Sciences and Mathematics
dc.subject.otherPhysics
dc.titleDark Matter with Density-dependent Interactions
dc.typeArticle
digcom.contributor.authorBoddy, Kimberly K
digcom.contributor.authorCarroll, Sean M
digcom.contributor.authorisAuthorOfPublication|email:trodden@physics.upenn.edu|institution:University of Pennsylvania|Trodden, Mark
digcom.identifierphysics_papers/272
digcom.identifier.contextkey3631288
digcom.identifier.submissionpathphysics_papers/272
digcom.typearticle
dspace.entity.typePublication
relation.isAuthorOfPublicationa1932343-644c-45a5-83d0-8b7c2b56e1e1
relation.isAuthorOfPublicationa1932343-644c-45a5-83d0-8b7c2b56e1e1
relation.isAuthorOfPublication.latestForDiscoverya1932343-644c-45a5-83d0-8b7c2b56e1e1
upenn.schoolDepartmentCenterDepartment of Physics Papers
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