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Supersymmetric Discovery Potential And Benchmarks For Early Runs At √S=7 Tev At The Lhc, Baris Altunkaynak, Michael Holmes, Pran Nath, Brent D. Nelson, Gregory Peim
Supersymmetric Discovery Potential And Benchmarks For Early Runs At √S=7 Tev At The Lhc, Baris Altunkaynak, Michael Holmes, Pran Nath, Brent D. Nelson, Gregory Peim
Brent Nelson
We carry out an analysis of the potential of the Large Hadron Collider (LHC) to discover supersymmetry in runs at √s=7 TeV with an accumulated luminosity of (0.1–2) fb⁻1 of data. The analysis is done with both minimal supergravity and supergravity models with nonuniversal soft breaking. Benchmarks for early discovery with (0.1–2) fb⁻1 of data are given. We provide an update of b-tagging efficiencies in PGS 4 appropriate for LHC analyses. A large number of signature channels are analyzed, and it is shown that each of the models exhibited are discoverable at the 5σ level or more above the standard …
Explaining Pamela And Wmap Data Through Coannihilations In Extended Sugra With Collider Implications, Daniel Feldman, Zuowei Liu, Pran Nath, Brent D. Nelson
Explaining Pamela And Wmap Data Through Coannihilations In Extended Sugra With Collider Implications, Daniel Feldman, Zuowei Liu, Pran Nath, Brent D. Nelson
Brent Nelson
The PAMELA positron excess is analyzed within the framework of nonuniversal supergravity (SUGRA) models with an extended U(1)n gauge symmetry in the hidden sector leading to neutralino dark matter with either a mixed Higgsino-wino lightest R-parity odd supersymmetric particle (LSP) or an essentially pure wino-dominated LSP. The Higgsino-wino LSP can produce the observed PAMELA positron excess and satisfy relic density constraints in the extended class of models due to a near degeneracy of the mass spectrum of the extended neutralino sector with the LSP mass. The simultaneous satisfaction of the WMAP relic density data and the PAMELA data is accomplished …
Predictive Signatures Of Supersymmetry: Measuring The Dark Matter Mass And Gluino Mass With Early Lhc Data, Daniel Feldman, Katherine Freese, Pran Nath, Brent D. Nelson, Gregory Peim
Predictive Signatures Of Supersymmetry: Measuring The Dark Matter Mass And Gluino Mass With Early Lhc Data, Daniel Feldman, Katherine Freese, Pran Nath, Brent D. Nelson, Gregory Peim
Brent Nelson
We present a focused study of a predictive unified model whose measurable consequences are immediately relevant to early discovery prospects of supersymmetry at the LHC. ATLAS and CMS have released their analysis with 35 pb-1 of data and the model class we discuss is consistent with this data. It is shown that with an increase in luminosity, the LSP dark matter mass and the gluino mass can be inferred from simple observables such as kinematic edges in leptonic channels and peak values in effective mass distributions. Specifically, we consider cases in which the neutralino is of low mass and where …