An effective Z ′

Patrick J. Fox, Jia Liu, David Tucker-Smith, Neal Weiner

    Research output: Contribution to journalArticle

    Abstract

    We describe a method to couple Z gauge bosons to the standard model (SM), without charging the SM fields under the U(1) , but instead through effective higher-dimension operators. This method allows complete control over the tree-level couplings of the Z and does not require altering the structure of any of the SM couplings, nor does it contain anomalies or require introduction of fields in nonstandard SM representations. Moreover, such interactions arise from simple renormalizable extensions of the SM-the addition of vectorlike matter that mixes with SM fermions when the U(1) is broken. We apply effective Z models as explanations of various recent anomalies: the D0 same-sign dimuon asymmetry, the CDF W+di-jet excess and the CDF top forward-backward asymmetry. In the case of the W+di-jet excess we also discuss several complementary analyses that may shed light on the nature of the discrepancy. We consider the possibility of non-Abelian groups, and discuss implications for the phenomenology of dark matter as well.

    Original languageEnglish (US)
    Article number115006
    JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
    Volume84
    Issue number11
    DOIs
    StatePublished - Dec 6 2011

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    asymmetry
    anomalies
    phenomenology
    charging
    dark matter
    bosons
    fermions
    operators
    interactions

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics

    Cite this

    An effective Z ′ . / Fox, Patrick J.; Liu, Jia; Tucker-Smith, David; Weiner, Neal.

    In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 84, No. 11, 115006, 06.12.2011.

    Research output: Contribution to journalArticle

    Fox, Patrick J. ; Liu, Jia ; Tucker-Smith, David ; Weiner, Neal. / An effective Z ′ . In: Physical Review D - Particles, Fields, Gravitation and Cosmology. 2011 ; Vol. 84, No. 11.
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