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Lorentz violation and red shift of gravitational waves in brane-worlds |
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| Authors: | F Ahmadi J Khodagholizadeh H R Sepangi |
| Institution: | 1. Department of Physics, Shahid Rajaee Teacher Training University, Lavizan, Tehran, 16788, Iran 2. Department of Physics, Tarbiat Modares University, Tehran, 14115-398, Iran 3. Department of Physics, Shahid Beheshti University, G. C., Evin, Tehran, 19839, Iran |
| Abstract: | In this paper we study the speed of gravitational waves in a brane world scenario and show that if the extra dimension is space-like, the speed of the propagation of such waves is greater in the bulk than that on the brane. Therefore, the 4D Lorentz invariance is broken in the gravitational sector. A comparison is also made between the red shift of such waves and those of the electromagnetic waves on the brane. Such a comparison is essential for extracting the signature of the extra dimension and thus clarifying the question of maximal velocity of gravitational waves in the bulk. |
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