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Off-Shell Interactions for Closed-String Tachyons.

DE2004826851

Publication Date	2004
Personal Author	Dabholkar, A.; Iqubal, A.; Raeymaekers, J.
Page Count	42
Abstract	Off-shell interactions for localized closed-string tachyons in C/Z(sub N) superstring backgrounds are analyzed and a conjecture for the effective height of the tachyon potential is elaborated. At large N, some of the relevant tachyons are nearly massless and their interactions can be deduced from the S-matrix. The cubic interactions between these tachyons and the massless fields are computed in a closed form using orbifold CFT techniques. The cubic interaction between nearly-massless tachyons with different charges is shown to vanish and thus condensation of one tachyon does not source the others. It is shown that to leading order in N, the quartic contact interaction vanishes and the massless exchanges completely account for the four point scattering amplitude.
Keywords	Tachyons Orbifolds Matrix Decays String theory Amplitudes Scattering Coupling Interactions Closed strings
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Stanford Linear Accelerator Center, CA.; Stanford Univ., CA. Dept. of Physics.; Tata Inst. of Fundamental Research, Bombay (India).; Department of Energy, Washington, DC.; Korea Advanced Inst. of Science and Technology, Seoul (Republic of
Supplemental Notes	Prepared in cooperation with Korea Advanced Inst. of Science and Technology, Seoul (Republic of Korea). School of Physics., Stanford Univ., CA. Dept. of Physics. and Tata Inst. of Fundamental Research, Bombay (India). Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200510

Off-Shell Interactions for Closed-String Tachyons.

Off-Shell Interactions for Closed-String Tachyons.
DE2004826851

Publication Date	2004
Personal Author	Dabholkar, A.; Iqubal, A.; Raeymaekers, J.
Page Count	42
Abstract	Off-shell interactions for localized closed-string tachyons in C/Z(sub N) superstring backgrounds are analyzed and a conjecture for the effective height of the tachyon potential is elaborated. At large N, some of the relevant tachyons are nearly massless and their interactions can be deduced from the S-matrix. The cubic interactions between these tachyons and the massless fields are computed in a closed form using orbifold CFT techniques. The cubic interaction between nearly-massless tachyons with different charges is shown to vanish and thus condensation of one tachyon does not source the others. It is shown that to leading order in N, the quartic contact interaction vanishes and the massless exchanges completely account for the four point scattering amplitude.
Keywords	Tachyons Orbifolds Matrix Decays String theory Amplitudes Scattering Coupling Interactions Closed strings
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Stanford Linear Accelerator Center, CA.; Stanford Univ., CA. Dept. of Physics.; Tata Inst. of Fundamental Research, Bombay (India).; Department of Energy, Washington, DC.; Korea Advanced Inst. of Science and Technology, Seoul (Republic of
Supplemental Notes	Prepared in cooperation with Korea Advanced Inst. of Science and Technology, Seoul (Republic of Korea). School of Physics., Stanford Univ., CA. Dept. of Physics. and Tata Inst. of Fundamental Research, Bombay (India). Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200510