Greybody factor for D3-branes in B field

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 ${\sigma }_l^{B\ne 0}>{\sigma }_l^{B=0}$. 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.

some discussions and references are added, 10 pages, no figure, ReVTeX

References in corpus (8)

• String Theory and Noncommutative Geometry
• Large N Limit of Non-Commutative Gauge Theories
• Non-Commutative Yang-Mills and the AdS/CFT Correspondence
• On the Thermodynamics of Large N Noncommutative Super Yang-Mills Theory
• On the Hierarchy Between Non-Commutative and Ordinary Supersymmetric Yang-Mills
• Closed Strings Interacting with Noncommutative D-branes
• Supergravity with Self-dual B fields and Instantons in Noncommutative Gauge Theory
• Scalar Absorption by Noncommutative D3-branes

Cited by in corpus (2)

• Graviton Scattering on D6 Branes with B Fields
• Scalar Absorption by Noncommutative D3-branes