Scalar absorption by noncommutative D3-branes

The classical cross section for low energy absorption of the RR-scalar by a stack of noncommutative D3-branes in the large NS B-field limit is calcula ted. In the spirit of AdS/CFT correspondence, this cross section is related to two point function of a certain operator in noncommutative Yang-Mills t heory. Compared at the same gauge coupling, the result agrees with that of obtained from ordinary D3-branes. This is consistent with the expectation t hat ordinary and noncommutative Yang-Mills theories are equivalent below th e noncommutativity scale, but it is a nontrivial prediction above this scal e.