Discovery and measurement of sleptons, binos, and winos with a Z′

Matthew Baumgart, Thomas Hartman, Can Kilic, Lian Tao Wang

Research output: Contribution to journalArticle

27 Scopus citations

Abstract

Extensions of the MSSM could significantly alter its phenomenology at the LHC. We study the case in which the MSSM is extended by an additional U(1) gauge symmetry, which is spontaneously broken at a few TeV. The production cross-section of sleptons is enhanced over that of the MSSM by the process ppZ′*, so the discovery potential for sleptons is greatly increased. The flavor and charge information in the resulting decay, ℓ+LSP, provides a useful handle on the identity of the LSP. With the help of the additional kinematical constraint of an on-shell Z′, we implement a novel method to measure all of the superpartner masses involved in this channel. For certain final states with two invisible particles, one can construct kinematic observables bounded above by parent particle masses. We demonstrate how output from one such observable, m T2, can become input to a second, increasing the number of measurements one can make with a single decay chain. The method presented here represents a new class of observables which could have a much wider range of applicability.

Original languageEnglish (US)
Article number084
JournalJournal of High Energy Physics
Volume2007
Issue number11
DOIs
StatePublished - Nov 1 2007
Externally publishedYes

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Keywords

  • Beyond standard model
  • Supersymmetric standard model

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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