Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2000-11-27
Phys.Rev.D63:126006,2001
Physics
High Energy Physics
High Energy Physics - Theory
11 pages, 3 figures; v2. a reference added, typos corrected
Scientific paper
10.1103/PhysRevD.63.126006
The generalized *-products, or the $*_N$-products, appear both in the one-loop effective action of noncommutative Yang-Mills theories and in the coupling of a closed string to N open strings on a disk when the D-brane world-volume is noncommutative. Factorization of the string amplitudes provides a uniform understanding of the $*_N$-products and a hint to obtain a simple, explicit formula (in the momentum space) for arbitrary N in the non-Abelian case. Possible extension to a more general ${}_M *_{N}$-product in the M-loop context is discussed.
Kiem Youngjai
Lee Sangmin
Park Dong Hyun
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