TY - JOUR

T1 - De sitter brane gravity

T2 - From close-up to panorama

AU - Parikh, Maulik K.

AU - Solodukhin, Sergey N.

N1 - Funding Information:
We thank Nima Arkani-Hamed, Andrey Barvinski, Gia Dvali, Andrey Neronov, and Ivo Sachs for helpful discussions. M.P. is supported by European Commission RTN Programme HPRN-CT-2000-00131. S.S. is supported by the DFG Priority Programme SPP-1096.

PY - 2001/3/29

Y1 - 2001/3/29

N2 - We find explicitly the induced graviton propagator on de Sitter branes embedded in various five-dimensional spacetimes; de Sitter branes in AdS and Minkowski space are particular cases. By studying the structure of the momentum-space propagator, we are able to extract interesting physics, much of which is qualitatively different from that of flat branes. We find that (1) there can be a set of graviton-like particles which mediate brane gravity at different scales; (2) localized gravity can exist even on de Sitter branes in Minkowski space; (3) Kaluza-Klein modes also contribute to conventional 4D gravity for de Sitter branes in AdS; and (4) Newton's constant can vary considerably with scale. We comment on the implications for the effective cosmological constant.

AB - We find explicitly the induced graviton propagator on de Sitter branes embedded in various five-dimensional spacetimes; de Sitter branes in AdS and Minkowski space are particular cases. By studying the structure of the momentum-space propagator, we are able to extract interesting physics, much of which is qualitatively different from that of flat branes. We find that (1) there can be a set of graviton-like particles which mediate brane gravity at different scales; (2) localized gravity can exist even on de Sitter branes in Minkowski space; (3) Kaluza-Klein modes also contribute to conventional 4D gravity for de Sitter branes in AdS; and (4) Newton's constant can vary considerably with scale. We comment on the implications for the effective cosmological constant.

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U2 - 10.1016/S0370-2693(01)00233-7

DO - 10.1016/S0370-2693(01)00233-7

M3 - Article

AN - SCOPUS:0035967230

SN - 0370-2693

VL - 503

SP - 384

EP - 393

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 3-4

ER -