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    National Tsing Hua University Institutional Repository > 理學院 > 物理系 > 期刊論文 >  Very narrow shadow extra Z boson at colliders

    Please use this identifier to cite or link to this item: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/55455

    Title: Very narrow shadow extra Z boson at colliders
    Authors: We-Fu Chang;Ng, J.N.;Wu, J.M.S.
    教師: 張維甫
    Date: 2006
    Publisher: American Physical Society
    Relation: PHYSICAL REVIEW D, American Physical Society, Volume 74, 2006
    Keywords: shadow sector
    Abstract: We consider the phenomenological consequences of a hidden Higgs sector extending the standard model (SM), in which the "shadow Higgs" are uncharged under the SM gauge groups. We consider a simple U(1) model with one Higgs singlet. One mechanism which sheds light on the shadow sector is the mixing between the neutral gauge boson of the SM and the additional U(1) gauge group. The mixing happens through the usual mass mixing and also kinetic mixing, and is the only way the "shadow Z" couples to the SM. We study in detail modifications that the presence of such shadow sector would bring to the electroweak precision tests, which in turn provide constraints on the kinetic-mixing parameter, sε, left free in our model. The shadow Z production rate at the CERN LHC and the International Linear Collider depends on sε. We find that the observable event rate at both facilities is possible for a reasonable range of sε allowed by electroweak precision tests
    URI: http://www.aps.org/
    Appears in Collections:[物理系] 期刊論文

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