String photini at the LHC

Asimina Arvanitaki, Nathaniel Craig, Savas Dimopoulos, Sergei Dubovsky, John March-Russell

    Research output: Contribution to journalArticle

    Abstract

    String theories with topologically complex compactification manifolds suggest the simultaneous presence of many unbroken U(1)'s without any light matter charged under them. The gauge bosons associated with these U(1)'s do not have direct observational consequences. However, in the presence of low energy supersymmetry the gauge fermions associated with these U(1)'s, the "photini," mix with the bino and extend the minimal supersymmetric standard model neutralino sector. This leads to novel signatures at the LHC. The lightest ordinary supersymmetric particle (LOSP) can decay to any one of these photini. In turn, photini may transition into each other, leading to high lepton and jet multiplicities. Both the LOSP decays and interphotini transitions can lead to displaced vertices. When the interphotini decays happen outside the detector, the cascades can result in different photini escaping the detector, leading to multiple reconstructed masses for the invisible particle. If the LOSP is charged, it stops in the detector and decays out of time to photini, with the possibility that the produced final photini vary from event to event. Observation of a plenitude of photini at the LHC would be evidence that we live in a string vacuum with a topologically rich compactification manifold.

    Original languageEnglish (US)
    Article number075018
    JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
    Volume81
    Issue number7
    DOIs
    StatePublished - Apr 22 2010

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    strings
    detectors
    decay
    particle decay
    string theory
    supersymmetry
    leptons
    cascades
    charged particles
    apexes
    sectors
    bosons
    fermions
    signatures
    vacuum
    energy

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics

    Cite this

    Arvanitaki, A., Craig, N., Dimopoulos, S., Dubovsky, S., & March-Russell, J. (2010). String photini at the LHC. Physical Review D - Particles, Fields, Gravitation and Cosmology, 81(7), [075018]. https://doi.org/10.1103/PhysRevD.81.075018

    String photini at the LHC. / Arvanitaki, Asimina; Craig, Nathaniel; Dimopoulos, Savas; Dubovsky, Sergei; March-Russell, John.

    In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 81, No. 7, 075018, 22.04.2010.

    Research output: Contribution to journalArticle

    Arvanitaki, A, Craig, N, Dimopoulos, S, Dubovsky, S & March-Russell, J 2010, 'String photini at the LHC', Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 81, no. 7, 075018. https://doi.org/10.1103/PhysRevD.81.075018
    Arvanitaki A, Craig N, Dimopoulos S, Dubovsky S, March-Russell J. String photini at the LHC. Physical Review D - Particles, Fields, Gravitation and Cosmology. 2010 Apr 22;81(7). 075018. https://doi.org/10.1103/PhysRevD.81.075018
    Arvanitaki, Asimina ; Craig, Nathaniel ; Dimopoulos, Savas ; Dubovsky, Sergei ; March-Russell, John. / String photini at the LHC. In: Physical Review D - Particles, Fields, Gravitation and Cosmology. 2010 ; Vol. 81, No. 7.
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