JHEP 1006:113 (2010)
Works out the early-universe cosmology of composite inelastic dark matter, including the synthesis of constituent quarks into dark mesons and baryons, finding qualitatively different configurations depending on the mass hierarchy of the hidden sector.
Phys. Rev. D 75:085006 (2007)
Shows that in a class of supersymmetric models with metastable vacua, the transition to a lower-energy state does not occur even for arbitrarily high reheating temperatures, contrary to naive expectations about thermal transitions between vacua.
JCAP 0808:003 (2008)
Shows that many axion fields in string compactifications can collectively drive chaotic inflation, with each field traversing a sub-Planckian distance while their combined effect produces the large-field behavior required by observations. A radiatively stable realization of inflation from string theory's natural particle content.
Phys. Rev. D 72 (2005) 075011
Derives an upper limit on scalar superpartner masses in split supersymmetry from big bang nucleosynthesis constraints on long-lived gluinos. A TeV-mass gluino must decay within 100 seconds, setting the SUSY breaking scale below 10^9 GeV.