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SUMMARY:Derivative chameleons - Johannes Noller (Imperial College London)
DTSTART:20120430T120000Z
DTEND:20120430T130000Z
UID:TALK37734@talks.cam.ac.uk
CONTACT:Camille Bonvin
DESCRIPTION:With now Nobel-prize-winning observational evidence for the\na
 ccelerated expansion of the Universe\, we are still in search of a\nthorou
 gh theoretical understanding of its cause. One strong candidate\nin this e
 nterprise are chameleon theories\, where a new scalar degree\nof freedom m
 odifies GR on cosmological scales\, but is screened away in\ndense environ
 ments so as to comply with tight fifth force constraints.\nIn this talk I 
 will introduce and discuss generalized chameleon models\nwhere the conform
 al coupling between matter and gravitational\ngeometries is not only a fun
 ction of the chameleon field phi\, but also\nof its derivatives via higher
  order co-ordinate invariants.
LOCATION:CMS\, Pav.B\, CTC Common Room (B1.19)
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