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Exploring supersymmetric model with very light gravitino at the LHC

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Abstract

The low-scale gauge mediation scenario of supersymmetry breaking predicts very light gravitino, which makes the next lightest supersymmetric particle (NLSP) quasi stable. We study the LHC phenomenology of the case that the NLSP is the stau. When the mass of the gravitino is of the order of 10 eV, the decay length of stau is about 0.1-1 mm, so that it decays before reaching the first layer of the inner silicon detector. We show, however, that, with utilizing the impact parameter of τ -jets from the stau decay, it is possible to determine the mass spectrum of sparticles precisely. It is also possible to estimate the lifetime of the stau by observing distribution of the impact parameter.

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Authors and Affiliations

  1. Institute for Theoretical Physics, University of Hamburg, Luruper Chausse 149, DE-22761, Hamburg, Germany

    Masaki Asano

  2. Department of Physics, University of Tokyo, Tokyo, 113-0033, Japan

    Masaki Asano, Takumi Ito & Takeo Moroi

  3. Department of Physics, Tohoku University, Sendai, 980-8578, Japan

    Takumi Ito

  4. IPMU, TODIAS, University of Tokyo, Kashiwa, 277-8583, Japan

    Shigeki Matsumoto & Takeo Moroi

Authors
  1. Masaki Asano
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  2. Takumi Ito
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  3. Shigeki Matsumoto
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  4. Takeo Moroi
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Correspondence to Masaki Asano.

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ArXiv ePrint: 1111.3725

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Asano, M., Ito, T., Matsumoto, S. et al. Exploring supersymmetric model with very light gravitino at the LHC. J. High Energ. Phys. 2012, 11 (2012). https://doi.org/10.1007/JHEP03(2012)011

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  • DOI: https://doi.org/10.1007/JHEP03(2012)011

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