Quantization and high energy unitarity of 5D orbifold theories with brane kinetic terms

Alexander Mück, Lars Nilse, Apostolos Pilaftsis, Reinhold Rückl

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Five-dimensional field theories compactified on an S1/ ℤ2 orbifold naturally include local brane kinetic terms at the orbifold fixed points at the tree as well as the quantum level. We study the quantization of these theories before the Kaluza-Klein reduction and derive the relevant Ward and Slavnov-Taylor identities that result from the underlying gauge and Becchi-Rouet-Stora symmetries of the theory. With the help of these identities, we obtain a generalization of the equivalence theorem, where the known high-energy equivalence relation between the longitudinal Kaluza-Klein gauge modes and their respective would-be Goldstone bosons is extended to consistently include the energetically suppressed terms in the high-energy scatterings. Demanding perturbative unitarity, we compute upper limits on the number of the Kaluza-Klein modes. We find that these limits weakly depend on the size of the brane kinetic terms. © 2005 The American Physical Society.
    Original languageEnglish
    Pages (from-to)1-24
    Number of pages23
    JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
    Volume71
    Issue number6
    DOIs
    Publication statusPublished - 15 Mar 2005

    Keywords

    • Field theory (Kaluza-Klein theory; quantization and high energy unitarity of 5D orbifold theories with brane kinetic terms before Kaluza-Klein redn.); String theory (brane; quantization and high energy unitarity of 5D orbifold theories with brane kinetic terms); Quantization (quantization and high energy unitarity of 5D orbifold theories with brane kinetic terms)

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