Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1999-11-24
Phys.Rev. D62 (2000) 047503
Physics
High Energy Physics
High Energy Physics - Theory
some discussions and references are added, 10 pages, no figure, ReVTeX
Scientific paper
10.1103/PhysRevD.62.047503
We calculate the effect of noncommutative spacetime on the greybody factor on the supergravity side. For this purpose we introduce a system of D3-branes with a constant NS $B$-field along their world volume directions ($x_2, x_3$). Considering the propagation of minimally coupled scalar with non-zero momentum along($x_2, x_3$), we derive an exact form of the greybody factor in $B$ field. It turns out that $\sigma^{B\ne0}_l > \sigma^{B=0}_l$. This means that the presence of $B$-field (the noncommutativity) suppresses the potential barrier surrounding the black hole. As a result, it comes out the increase of greybody factor.
Kang Gungwon
Lee Hyun Woo
Myung Yun Soo
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