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arXiv · hep-th/9911193

Greybody factor for D3-branes in B field

Y. S. Myung·Gungwon Kang·H. W. Lee
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Abstract

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 $σ^{B\ne0}_l > σ^{B=0}_l$. 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.

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Y. S. Myung, Gungwon Kang, H. W. Lee. 2000-02-19. Greybody factor for D3-branes in B field. https://doi.org/10.1103/physrevd.62.047503

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