Oscillating asymmetric dark matter
dc.contributor.author | Tulin, Sean | en_US |
dc.contributor.author | Yu, Hai-Bo | en_US |
dc.contributor.author | Zurek, Kathryn M. | en_US |
dc.date.accessioned | 2013-06-28T15:25:55Z | |
dc.date.available | 2013-06-28T15:25:55Z | |
dc.date.issued | 2012 | en_US |
dc.identifier.citation | Tulin, Sean; Yu, Hai-Bo; Zurek, Kathryn M. (2012). "Oscillating asymmetric dark matter." Journal of Cosmology and Astroparticle Physics 2012(5): 13. <http://hdl.handle.net/2027.42/98629> | en_US |
dc.identifier.uri | http://stacks.iop.org/1475-7516/2012/i=05/a=013 | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/98629 | |
dc.description.abstract | We study the dynamics of dark matter (DM) particle-antiparticle oscillations within the context of asymmetric DM. Oscillations arise due to small DM number-violating Majorana-type mass terms, and can lead to recoupling of annihilation after freeze-out and washout of the DM density. Asymmetric DM oscillations "interpolate" between symmetric and asymmetric DM freeze-out scenarios, and allow for a larger DM model-building parameter space. We derive the density matrix equations for DM oscillations and freeze-out from first principles using nonequilibrium field theory, and our results are qualitatively different than in previous studies. DM dynamics exhibits particle-vs-antiparticle "flavor" effects, depending on the interaction type, analogous to neutrino oscillations in a medium. "Flavor-sensitive" DM interactions include scattering or annihilation through a new vector boson, while "flavor-blind" interactions include scattering or s -channel annihilation through a new scalar boson. In particular, we find that flavor-sensitive annihilation does not recouple when coherent oscillations begin, and that flavor-blind scattering does not lead to decoherence. | en_US |
dc.publisher | IOP Publishing | en_US |
dc.title | Oscillating asymmetric dark matter | en_US |
dc.type | Article | en_US |
dc.subject.hlbsecondlevel | Physics | en_US |
dc.subject.hlbtoplevel | Science | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/98629/1/1475-7516_2012_05_013.pdf | |
dc.identifier.doi | 10.1088/1475-7516/2012/05/013 | en_US |
dc.identifier.source | Journal of Cosmology and Astroparticle Physics | en_US |
dc.owningcollname | Physics, Department of |
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