Discovery of supersymmetry with degenerate mass spectrum

Kiyotomo Kawagoe, Mihoko M. Nojiri

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The discovery of supersymmetric (SUSY) particles at the Large Hadron Collider (LHC) has been studied for models where the squarks and gluino are much heavier than the lightest supersymmetric particle. In this paper, we investigate SUSY discovery in models with a degenerate mass spectrum up to mLSP 0.7mq∼. Such a mass spectrum is predicted in a certain parameter region of the mixed modulus anomaly mediation model. We find that the effective transverse mass of the signal for the degenerate parameters shows a distribution similar to that of the background. Experimental sensitivity to the SUSY particles at the LHC therefore depends on the uncertainty of the background in this class of model. We also find that the SUSY signal shows an interesting correlation between Meff and E T which may be used to better determine the signal region and enhance the S/N ratio even if the sparticle masses are rather degenerate. This correlation is universal for models with new heavy colored particles decaying into visible particles and a stable neutral dark matter.

元の言語英語
記事番号115011
ジャーナルPhysical Review D - Particles, Fields, Gravitation and Cosmology
74
発行部数11
DOI
出版物ステータス出版済み - 12 27 2006
外部発表Yes

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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