Lorentz-violating dark matter

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dc.contributor.advisor Allen , Roland E . en_US
dc.contributor.committeeMember Arnowitt , Richard L . en_US
dc.creator Mondragon , Antonio Richard en_US
dc.date.accessioned 2010 -01 -14T23 :55 :31Z
dc.date.accessioned 2014 -02 -19T19 :38 :21Z
dc.date.available 2010 -01 -14T23 :55 :31Z
dc.date.available 2014 -02 -19T19 :38 :21Z
dc.date.created 2007 -05 en_US
dc.date.issued 2009 -05 -15 en_US
dc.identifier.uri http : / /hdl .handle .net /1969 .1 /ETD -TAMU -1672
dc.description.abstract Observations from the 1930s until the present have established the existence of dark matter with an abundance that is much larger than that of luminous matter . Because none of the known particles of nature have the correct properties to be identified as the dark matter , various exotic candidates have been proposed . The neutralino of supersymmetric theories is the most promising example . Such cold dark matter candidates , however , lead to a conflict between the standard simulations of the evolution of cosmic structure and observations . Simulations predict excessive structure formation on small scales , including density cusps at the centers of galaxies , that is not observed . This conflict still persists in early 2007 , and it has not yet been convincingly resolved by attempted explanations that invoke astrophysical phenomena , which would destroy or broaden all small scale structure . We have investigated another candidate that is perhaps more exotic : Lorentz -violating dark matter , which was originally motivated by an unconventional fundamental theory , but which in this dissertation is defined as matter which has a nonzero minimum velocity . Furthermore , the present investigation evolved into the broader goal of exploring the properties of Lorentz -violating matter and the astrophysical consequences ? a subject which to our knowledge has not been previously studied . Our preliminary investigations indicated that this form of matter might have less tendency to form small -scale structure . These preliminary calculations certainly established that Lorentz -violating matter which always moves at an appreciable fraction of the speed of light will bind less strongly . However , the much more thorough set of studies reported here lead to the conclusion that , although the binding energy is reduced , the small -scale structure problem is not solved by Lorentz -violating dark matter . On the other hand , when we compare the predictions of Lorentz -violating dynamics with those of classical special relativity and general relativity , we find that differences might be observable in the orbital motions of galaxies in a cluster . For example , galaxies ? which are composed almost entirely of dark matter ? observed to have enlarged orbits about the cluster center of mass may be an indication of Lorentz violation . en_US
dc.format.medium electronic en_US
dc.format.mimetype application /pdf en_US
dc.language.iso en _US en_US
dc.subject Lorentz Violation en_US
dc.title Lorentz -violating dark matter en_US
dc.type Book en
dc.type.genre Electronic Dissertation en_US
dc.type.material text en_US
dc.format.digitalOrigin born digital en_US


Lorentz-violating dark matter. Available electronically from http : / /hdl .handle .net /1969 .1 /ETD -TAMU -1672 .

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