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| Paper IPM / P / 11302 |
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| Abstract: | |
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We calculate in details ,the disk level S-matrix element of one Ramond-Ramond and three gauge field vertex operators in the world volume of BPS branes ,to find four gauge field couplings to all order of α′ up to on-shell ambiguity .Then using these infinite couplings we find that the massless pole of the field theory amplitude is exactly equal to the massless pole S-matrix element of this amplitude for p=n case to all order of α′.Finally we show that the infinite massless poles and the contact terms of this amplitude for p=n+2 case can be reproduced by symmetric action DBI and the WZ actions, and by their higher derivative corrections.
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