TY - JOUR
T1 - Solving the hierarchy problem in two-brane cosmological models
AU - Kanti, Panagiota
AU - Olive, Keith A.
AU - Pospelov, Maxim
PY - 2000/12/15
Y1 - 2000/12/15
N2 - We analyze cosmological solutions in the class of two-brane models with arbitrary tensions which contain matter with general equations of state. We show that the mass hierarchy between the two branes is determined by the ratio of the lapse functions evaluated on the branes. This ratio can be sufficiently small without fine-tuning the brane separation, once the transverse dimension is stabilized. For suitably large interbrane separations, both brane tensions are positive. We also find that the cosmological evolution obeys the standard four-dimensional Friedmann equation up to small corrections.
AB - We analyze cosmological solutions in the class of two-brane models with arbitrary tensions which contain matter with general equations of state. We show that the mass hierarchy between the two branes is determined by the ratio of the lapse functions evaluated on the branes. This ratio can be sufficiently small without fine-tuning the brane separation, once the transverse dimension is stabilized. For suitably large interbrane separations, both brane tensions are positive. We also find that the cosmological evolution obeys the standard four-dimensional Friedmann equation up to small corrections.
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U2 - 10.1103/PhysRevD.62.126004
DO - 10.1103/PhysRevD.62.126004
M3 - Article
AN - SCOPUS:18144394741
SN - 0556-2821
VL - 62
SP - 1
EP - 10
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
IS - 12
M1 - 126004
ER -