The Tachyon Potential in Superstring Field Theory

Smet, Pieter-Jan De

doi:10.1002/1521-3978(200105)49:4/6<469::aid-prop469>3.0.co;2-v

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2018

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“…Hence, we impose an identity internal CP matrix to all massless fields including gauge (scalar) and RR fields in zero picture. It is discussed in [ 21 ] that a Picture Changing Operator (PCO) carries a CP matrix . It is explained in [ 22 ] that the tachyon in zero and the ( ) picture carries and CP factors.…”

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confidence: 99%

On non-BPS effective actions of string theory

Hatefi

2018

Eur. Phys. J. C

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We discuss some physical prospective of the non-BPS effective actions of type IIA and IIB superstring theories. By dealing with all complete three and four point functions, including a closed Ramond-Ramond string (in terms of both its field strength and its potential), gauge (scalar) fields as well as a real tachyon and under symmetry structures, we find various restricted world volume and bulk Bianchi identities. The complete forms of the non-BPS scattering amplitudes including their Chan-Paton factors are elaborated. All the singularity structures of the non-BPS amplitudes, their all order α higher-derivative corrections, their contact terms and various modified Bianchi identities are derived. Finally, we show that scattering amplitudes computed in different super-ghost pictures are compatible when suitable Bianchi identities are imposed on the Ramond-Ramond fields. Moreover, we argue that the higher-derivative expansion in powers of the momenta of the tachyon is universal.

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