Comment on 4D Lorentz invariance violations in the brane-world | Zendy

Horace Stoica | Zendy

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Comment on 4D Lorentz invariance violations in the brane-world

Author(s) -

Horace Stoica

Publication year - 2002

Publication title -

journal of high energy physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.998

H-Index - 261

eISSN - 1126-6708

pISSN - 1029-8479

DOI - 10.1088/1126-6708/2002/07/060

Subject(s) - brane , physics , observer (physics) , lorentz covariance , redshift , horizon , universe , theoretical physics , gravitation , gravitational field , lorentz transformation , classical mechanics , astrophysics , quantum mechanics , astronomy , galaxy

The brane-world scenario offers the possibility for signals to travel outsideour visible universe and reenter it. We find the condition for a signal emittedfrom the brane to return to the brane. We study the propagation of such signalsand show that, as seen by a 4D observer, these signals arrive earlier thanlight traveling along the brane. We also study the horizon problem and findthat, while the bulk signals can travel far enough to homogenize the visibleuniverse, it is unlikely that they have a significant effect since they areredshifted in the gravitational field of the bulk black hole.Comment: 21 pages, 6 figures, REVTEX, New section adde

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