Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2006-10-09
Nucl.Phys.B766:269-283,2007
Physics
High Energy Physics
High Energy Physics - Theory
22 pages, 10 eps figures included in the text V2: mistyping is corrected in reference and text. one more reference is added. T
Scientific paper
10.1016/j.nuclphysb.2007.01.002
The emission spectra for the spin-1 photon fields are computed when the spacetime is a $(4+n)$-dimensional Schwarzschild phase. For the case of the bulk emission we compute the spectra for the vector mode and scalar mode separately. Although the emissivities for the scalar mode is larger than those for the vector mode when $n$ is small, the emissivities for the vector mode photon become dominant rapidly with increasing $n$. For the case of the brane emission the emission spectra are numerically computed by making use of the complex potential method. Comparision of the total bulk emissivities with total brane emissivities indicates that the effect of the field spin makes the bulk emission to be rapidly dominant with increasing $n$. However, the bulk-to-brane relative emissivity per degree of freedom always remains smaller than unity. The importance for the spin-2 graviton emission problem is discussed.
Jung Eylee
Park Dae Kil
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