Asymptotic analysis of the Boltzmann equation for dark matter relics in the presence of a running dilaton and space-time defects

作者：Bender Carl M^*; Mavromatos Nick E; Sarkark Sarben

来源：Physical Review D - Particles, Fields, Gravitation and Cosmology, 2013, 87(5): 055021.

DOI：10.1103/PhysRevD.87.055021

The interplay of dilatonic effects in dilaton cosmology and stochastic quantum space-time defects within the framework of string/brane cosmologies is examined. The Boltzmann equation describes the physics of thermal dark-matter-relic abundances in the presence of rolling dilatons. These dilatons affect the coupling of stringy matter to D-particle defects, which are generic in string theory. This coupling leads to an additional source term in the Boltzmann equation. The techniques of asymptotic matching and boundary-layer theory, which were recently applied by two of the authors (Bender and Sarkar) to a Boltzmann equation, are used here to find the detailed asymptotic relic abundances for all ranges of the expectation value of the dilaton field. The phenomenological implications for the search for super-symmetric dark matter in current colliders, such as the LHC, are discussed.

• 出版日期2013-3-22